ams Datasheet Page 1
[v1-07] 2016-Sep-09 Document Feedback
AS5601
12-Bit Programmable Contactless
Encoder
The AS5601 is an easy-to-program magnetic rotary position
sensor with incremental quadrature (A/B) and 12-bit digital
outputs. Additionally, the PUSH output indicates fast airgap
changes between the AS5601 and magnet which can be used
to implement a contactless pushbutton function in which the
knob can be pressed to move the magnet toward the AS5601.
This AS5601 is designed for contactless encoder applications,
and its robust design rejects the influence of any homogenous
external stray magnetic fields.
Based on planar Hall sensor technology, this device measures
the orthogonal component of the flux density (Bz) from an
external magnet.
The industry-standard I²C interface supports user
programming of non-volatile parameters in the AS5601 without
requiring a dedicated programmer.
The AS5601 also provides a smart low-power mode which
automatically reduces power consumption
Ordering Information and Content Guide appear at end of
datasheet.
Key Benefits & Features
The benefits and features of AS5601, 12-bit Programmable
Contactless Encoder are listed below:
Figure 1:
Added Value of Using AS5601
Benefits Features
Highest reliability and durability Contactless angle measurement insensitive to dust and dirt
Simple programming Simple user-programmable zero position and device
configuration
Flexible choice of the number of A/B
pulses per revolution Quadrature output configurable from 8 up to 2048 positions
Contactless pushbutton functionality Pushbutton output by detecting sudden airgap changes
Low power consumption Automatic entry into low-power mode
Easy setup Automatic magnet detection
Small form factor SOIC-8 package
Robust environmental tolerance Wide temperature range: -40°C to 125°C
General Description
Page 2 ams Datasheet
Document Feedback [v1-07] 2016-Sep-09
AS5601 − General Description
Applications
The AS5601 is ideally suited for:
Encoder replacement
Contactless rotary knobs with push buttons
Other angular position measurement solutions
Block Diagram
The functional blocks of this device are shown below:
Figure 2:
AS5601 Block Diagram
AFE
Automatic
Gain Control
(AGC)
12-bit A/D
Register Setting
One-Time
Programmable
(OTP) Memory
I²C
Low-Dropout
(LDO) Regulator
(internal load only)
AS5601
A
VDD5V
VDD3V3
GND
SDA
SCL
A/B Quadrature
Output Encoder B
ATAN
(CORDIC)
Dynamic
Magnitude
Monitoring PUSH
Magnetic Core
Hall Sensors Analog
Front-End
ams Datasheet Page 3
[v1-07] 2016-Sep-09 Document Feedback
AS5601 − Pin Assignments
Figure 3:
SOIC-8 Pin-Out
Pin Description
Figure 4:
Pin Description
Pin Number Name Type Description
1 VDD5V Supply Positive voltage supply in 5V mode
2 VDD3V3 Supply
Positive voltage supply in 3.3V mode (requires
an external 1-μF decoupling capacitor in 5V
mode)
3 PUSH Digital output Contactless pushbutton function output
4GNDSupply Ground
5 B Digital output Quadrature incremental signal B
6 SDA Digital input/output I²C Data
7SCLDigital inputI²C Clock
8 A Digital output Quadrature incremental signal A
Pin Assignments
2
3
45
6
7
81
VDD3V3
PUSH
GND
VDD5V
B
SDA
SCL
A
AS5601
Page 4 ams Datasheet
Document Feedback [v1-07] 2016-Sep-09
AS5601 − Absolute Maximum R atings
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. These are stress
ratings only. Functional operation of the device at these or any
other conditions beyond those indicated under Operating
Conditions is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect device
reliability.
Figure 5:
Absolute Maximum Ratings
Symbol Parameter Min Max Units Comments
Electrical Parameters
VDD5V DC supply voltage at
VDD5V pin -0.3 6.1 V 5.0V operation mode
VDD3V3 DC supply voltage at
VDD3V3 pin -0.3 4.0 V 3.3V operation mode
VAIO Voltage at all digital or
analog pins -0.3 VDD + 0.3 V
ISCR Input current (latch-up
immunity) -100 100 mA JESD78
Continuous Power Dissipation (TA = 70°C)
PTContinuous power
dissipation 50 mW
Electrostatic Discharge
ESDHBM Electrostatic discharge
HBM (human body model) ±1 kV MIL 883 E method 3015.7
Temperature Ranges and Storage Conditions
TSTRG Storage temperature range -55 125 °C
TBODY Package body temperature 260 °C
ICP/JEDEC J-STD-020
The reflow peak soldering
temperature (body
temperature) is specified
according to IPC/JEDEC
J-STD-020 “Moisture/Reflow
Sensitivity Classification for
Non-hermetic Solid State
Surface Mount Devices.” The
lead finish for Pb-free leaded
packages is “Matte Tin” (100%
Sn)
RHNC Relative humidity
(non-condensing) 585 %
MSL Moisture sensitivity level 3 ICP/JEDEC J-STD-033
Absolute Maximum Ratings
ams Datasheet Page 5
[v1-07] 2016-Sep-09 Document Feedback
AS5601 − Electrical Characteristics
All limits are guaranteed. The parameters with min and max
values are guaranteed with production tests or SQC (Statistical
Quality Control) methods.
Operating Conditions
Figure 6:
System Electrical Characteristics and Temperature Range
Note(s):
1. For typical magnetic field (60 mT) excluding current delivered to the external load and tolerance on polling times.
2. For OTP burn procedure the supply line source resistance should not exceed 1Ohm.
Symbol Parameter Conditions Min Typ Max Units
VDD5V Positive supply voltage in
5.0V mode
5.0V operation mode
4.5 5.0 5.5 V
During OTP burn procedure(2)
VDD3V3 Positive supply voltage in
3.3V mode
3.3V operation mode 3.0 3.3 3.6 V
During OTP burn procedure(2) 3.3 3.4 3.5 V
IDD Supply current in NOM (1) PM = 00 Always on 6.5 mA
lDD_LPM1 Supply current in LPM1 (1) PM = 01
Polling time = 5 ms 3.4 mA
lDD_ LPM2 Supply current in LPM2 (1) PM = 10
Polling time = 20 ms 1.8 mA
lDD_ LPM3 Supply current in LPM3 (1) PM = 11
Polling time = 100 ms 1.5 mA
IDD_BURN Supply current per bit for
burn procedure
Initial peak, 1 μs 100 mA
Steady burning, <30 μs 40 mA
TAOperating temperature -40 125 °C
TPProgramming
temperature 20 30 °C
Electrical Characteristics
Page 6 ams Datasheet
Document Feedback [v1-07] 2016-Sep-09
AS5601 − Electrical Characteristics
Digital Inputs and Outputs
Figure 7:
Digital Inputs and Outputs
Timing Characteristics
Figure 8:
Timing Conditions
Symbol Parameter Conditions Min Typ Max Units
V_IH High-level input
voltage 0.7 × VDD V
V_IL Low-level input
voltage 0.3 × VDD V
V_OH High-level output
voltage VDD - 0.5 V
V_OL Low-level output
voltage 0.4 V
I_O Output current
for A, B, and PUSH -2 2 mA
C_L Capacitive load
for A, B, and PUSH 50 pF
I_LKG Leakage current ±1 μA
Symbol Parameter Conditions Min Typ Max Units
T_DETWD Watchdog
detection time WD = 1 57 60 63 seconds
T_PU Power-up time 10 ms
F_S Sampling rate 150 μs
T_SETTL1 Settling time SF = 00 2.2 ms
T_SETTL2 Settling time SF = 01 1.1 ms
T_SETTL3 Settling time SF = 10 0.55 ms
T_SETTL4 Settling time SF = 11 0.286 ms
ams Datasheet Page 7
[v1-07] 2016-Sep-09 Document Feedback
AS5601 − Electrical Characteristics
Magnetic Characteristics
Figure 9:
Magnetic Characteristics
System Characteristics
Figure 10:
System Characteristics
Note(s):
1. An infinite fast change <180deg results in angle output with maximum configured update frequency.
2. An infinite fast change >= 180deg results in angle output to the shortest next absolute position with maximum configured update
frequency. e.g. A change from 0 to 270deg will be indicated as angle output from 0 to -90deg.
Symbol Parameter Conditions Min Typ Max Units
Bz
Orthogonal magnetic field
strength, regular output
noise ON_SLOW and
ON_FAST
Required orthogonal component
of the magnetic field strength
measured at the die's surface
along a circle of 1 mm
30 60 90 mT
Bz_ERROR
Minimum required
orthogonal magnetic field
strength, magnet
detection level
8mT
Symbol Parameter Conditions Min Typ Max Units
RES Core Resolution 12 bit
RES_AB A/B output resolution 8 2048 positions
VMAX_AB
Maximum rotation
speed for
incremental output
Continuous Rotation ≥ 360deg (1), (2) 456 rpm
INL_BL System INL
Deviation from best line fit; 360°
maximum angle, no magnet
displacement, no
zero-programming performed
±1 degree
ON_SLOW RMS output noise
(1 sigma)
Orthogonal component for the
magnetic field within the specified
range Bz, after 2.2 ms; SF = 00
0.015 degree
ON_FAST RMS output noise
(1 sigma)
Orthogonal component for the
magnetic field within the specified
range Bz, after 286 μs; SF = 11
0.043 degree
Page 8 ams Datasheet
Document Feedback [v1-07] 2016-Sep-09
AS5601 − Detailed Description
The AS5601 is a Hall-based rotary magnetic position encoder
that converts the magnetic field component perpendicular to
the surface of the chip into voltages which are used to produce
incremental A/B outputs and absolute position indication in
registers that can be read over an industry-standard I²C bus.
The analog signals from the Hall sensors are first amplified and
filtered before being converted by the analog-to-digital
converter (ADC) into binary data. The output of the ADC is
processed by the hardwired CORDIC block (Coordinate Rotation
Digital Computer) to compute the angle and magnitude of the
magnetic field vector. The intensity of the magnetic field is used
by the automatic gain control (AGC) to adjust the amplification
level to compensate for temperature and magnetic field
variations.
The angle value provided by the CORDIC algorithm is used by
the internal logic to generate the incremental quadrature
signals A and B. The magnitude and AGC value is dynamically
monitored and generates the PUSH output for fast changes of
the airgap between the magnet and the AS5601. Very slow
changes are suppressed to provide a robust and reliable
pushbutton output that tolerates temperature variation and
magnet degradation.
The AS5601 is programmed through an industry-standard I²C
interface to write an on-chip one-time programmable (OTP)
memory. This interface can be used to program a zero angle
and to configure the chip.
Power Management
The AS5601 is powered from a 5.0V supply using the on-chip
LDO regulator, or it can be powered directly from a 3.3V supply.
The internal LDO is not intended to power other external ICs
and needs a 1μF capacitor to ground, as shown in Figure 11.
In 3.3V operation, the VDD5V and VDD3V3 pins must be tied
together. VDD is the voltage level present at the VDD5V pin.
Detailed Description
ams Datasheet Page 9
[v1-07] 2016-Sep-09 Document Feedback
AS5601 − Detailed Description
Figure 11:
5.0V and 3.3V Power Supply Options
fifi
Page 10 ams Datasheet
Document Feedback [v1-07] 2016-Sep-09
AS5601 − Detailed Description
I²C Interface
The AS5601 supports the 2-wire Fast-mode Plus I²C-slave
protocol in device mode, in compliance with the NXP
Semiconductors (formerly Philips Semiconductors)
specification UM10204. A device that sends data onto the bus
is a transmitter and a device receiving data is a receiver. The
device that controls the message is called a master. The devices
that are controlled by the master are called slaves. A master
device generates the serial clock (SCL), controls the bus access,
and generates the START and STOP conditions that control the
bus. The AS5601 always operates as a slave on the I²C bus.
Connections to the bus are made through the open-drain I/O
lines SDA and the input SCL. Clock stretching is not included.
The host MCU (master) initiates data transfers. The 7-bit slave
address of the AS5601 is 0x36 (0110110 in binary).
Supported Modes
Random/Sequential read
Byte/Page write
Automatic increment (ANGLE register)
Standard-mode
Fast-mode
Fastmode Plus
The SDA signal is the bidirectional data line. The SCL signal is
the clock generated by the I²C bus master to synchronize
sampling data from SDA. The maximum SCL frequency is 1 MHz.
Data is sampled on the rising edge of SCL.
I²C Interface Operation
Figure 12:
I²C Electrical Specifications
SDA
SCL
StartStop
tbuf
tLOW tR
tHD.STA
tHIGH
tF
tSU.DAT tSU.STA
tHD.STA
tSU.STO
Repeated
Start
tHD.DAT
ams Datasheet Page 11
[v1-07] 2016-Sep-09 Document Feedback
AS5601 − Detailed Description
I²C Electrical Specification
Figure 13:
I²C Electrical Specifications
Note(s):
1. In Fast-mode Plus, fall time is specified the same for both output stage and bus timing. If series resistors are used this has to be
considered for bus timing.
2. Input filters on the SDA and SCL inputs suppress noise spikes of less than 50 ns.
3. I/O pins of Fast-mode and Fast-mode Plus devices must not load or drive the SDA and SCL lines if VDD is switched OFF.
4. Special-purpose devices such as multiplexers and switches may exceed this capacitance because they connect multiple paths
together.
Symbol Parameter Conditions Min Max Units
VIL Logic low input voltage -0.3 0.3 x VDD V
VIH Logic high input voltage 0.7 x VDD VDD + 0.3 V
VHYS Hysteresis of Schmitt
trigger inputs VDD > 2.5V 0.05 x VDD V
VOL
Logic low output voltage
(open-drain or
open-collector) at 3 mA
sink current
VDD > 2.5V 0.4 V
IOL Logic low output current VOL = 0.4V 20 mA
tOF Output fall time from
VIHmax to VILmax 10 120 (1) ns
tSP
Pulse width of spikes that
must be suppressed by
the input filter
50 (2) ns
IIInput current at each I/O
Pin
Input voltage
between 0.1 x VDD
and 0.9 x VDD
-10 +10 (3) μA
CBTotal capacitive load for
each bus line 550 pF
CI/O
I/O capacitance (SDA,
SCL) (4) 10 pF
Page 12 ams Datasheet
Document Feedback [v1-07] 2016-Sep-09
AS5601 − Detailed Description
I²C Timing
Figure 14:
I²C Timing
Note(s):
1. After this time, the first clock is generated.
2. A device must internally provide a minimum hold time of 120 ns (Fast-mode Plus) for the SDA signal (referred to the VIHmin of SCL)
to bridge the undefined region of the falling edge of SCL.
3. A Fast-mode device can be used in a standard-mode system, but the requirement tSU;DAT = 250 ns must be met. This is automatic if
the device does not stretch the low phase of SCL. If such a device does stretch the low phase of SCL, it must drive the next data bit
on SDA (tRmax + tSU;DAT = 1000 + 250 = 1250 ns) before SCL is released.
4. In Fast-mode Plus, fall time is specified the same for both output stage and bus timing. If series resistors are used, this has to be
considered for bus timing.
Symbol Parameter Conditions Min Max Units
fSCLK SCL clock frequency 1.0 MHz
tBUF
Bus free time (time
between the STOP and
START conditions)
0.5 μs
tHD;STA
Hold time; (Repeated)
START condition (1) 0.26 μs
tLOW Low phase of SCL clock 0.5 μs
tHIGH High phase of SCL clock 0.26 μs
tSU;STA
Setup time for a
Repeated START
condition
0.26 μs
tHD;DAT Data hold time (2) 0.45 μs
tSU;DAT Data setup time (3) 50 ns
tRRise time of SDA and SCL
signals 120 ns
tFFall time of SDA and SCL
signals 10 120 (4) ns
tSU;STO Setup time for STOP
condition 0.26 μs
ams Datasheet Page 13
[v1-07] 2016-Sep-09 Document Feedback
AS5601 − Detailed Description
I²C Modes
Invalid Addresses
There are two addresses used to access an AS5601 register. The
first is the slave address used to select the AS5601. All I²C bus
transactions include a slave address. The slave address of the
AS5601 is 0x36 (0110110 in binary). The second address is a
word address sent in the first byte transferred in a write
transaction. The word address selects a register on the AS5601.
The word address is loaded into the address pointer on the
AS5601. During subsequent read transactions and subsequent
bytes in the write transaction, the address pointer provides the
address of the selected register. The address pointer is
incremented after each byte is transferred, except for certain
read transactions to special registers.
If the user sets the address pointer to an invalid word address,
the address byte is not acknowledged (the A bit is high).
Nevertheless, a read or write cycle is possible. The address
pointer is increased after each byte.
Reading
When reading from an invalid address, the AS5601 returns all
zeros in the data bytes. The address pointer is incremented after
each byte. Sequential reads over the whole address range are
possible including address overflow.
Automatic increment of the address pointer for ANGLE, RAW
ANGLE, and MAGNITUDE registers:
These are special registers which suppress the automatic
increment of the address pointer on reads, so a re-read of these
registers requires no I²C write command to reload the address
pointer. This special treatment of the pointer is effective only if
the address pointer is set to the high byte of the register.
Writing
A write to an invalid address is not acknowledged by the
AS5601, although the address pointer is incremented. When the
address pointer points to a valid address again, a successful
write accessed is acknowledged. Page write over the whole
address range is possible including address overflow.
Supported Bus Protocol
Data transfer may be initiated only when the bus is not busy.
During data transfer, the data line must remain stable whenever
SCL is high. Changes in the data line while SCL is high are
interpreted as START or STOP conditions.
Page 14 ams Datasheet
Document Feedback [v1-07] 2016-Sep-09
AS5601 − Detailed Description
Accordingly, the following bus conditions have been defined:
Bus Not Busy
Both SDA and SCL remain high.
Start Data Transfer
A change in the state of SDA from high to low while SCL is high
defines the START condition.
Stop Data Transfer
A change in the state of SDA from low to high while SCL is high
defines the STOP condition.
Data Valid
The state of the data line represents valid data when, after a
START condition, SDA is stable for the duration of the high
phase of SCL. The data on SDA must only be changed during
the low phase of SCL. There is one clock period per bit of data.
Each I²C bus transaction is initiated with a START condition and
terminated with a STOP condition. The number of data bytes
transferred between START and STOP conditions is not limited,
and is determined by the I²C bus master. The information is
transferred byte-wise and each receiver acknowledges with a
ninth bit.
Acknowledge
Each I²C slave device, when addressed, is obliged to generate
an acknowledge after the reception of each byte. The I²C bus
master device must generate an extra clock period for this
acknowledge bit.
A slave that acknowledges must pull down SDA during the
acknowledge clock period in such a way that SDA is stable low
during the high phase of the acknowledge clock period. Of
course, setup and hold times must be taken into account. A
master must signal an end of a read transaction by not
generating an acknowledge bit on the last byte that has been
clocked out of the slave. In this case, the slave must leave SDA
high to enable the master to generate the STOP condition.
'FUflfl/wxxwm
ams Datasheet Page 15
[v1-07] 2016-Sep-09 Document Feedback
AS5601 − Detailed Description
Figure 15:
Data Read
Depending on the state of the R/W bit, two types of data transfer
are possible:
Data Transfer from a Master Transmitter to a Slave Receiver
The first byte transmitted by the master is the slave address,
followed by R/W = 0. Next follows a number of data bytes. The
slave returns an acknowledge bit after each received byte. If the
slave does not understand the command or data it sends a not
acknowledge (NACK). Data is transferred with the most
significant bit (MSB) first.
Data Transfer from a Slave Transmitter to a Master Receiver
The master transmits the first byte (the slave address). The slave
then returns an acknowledge bit, followed by the slave
transmitting a number of data bytes. The master returns an
acknowledge bit after all received bytes other than the last byte.
At the end of the last received byte, a NACK is returned. The
master generates all of the SCL clock periods and the START and
STOP conditions. A transfer is ended with a STOP condition or
with a repeated START condition. Because a repeated START
condition is also the beginning of the next serial transfer, the
bus is not released. Data is transferred with the most significant
bit (MSB) first.
1...19876...2 987
SDA
SCL
Start
Condition
Stop Condition or
Repeated Start Condition
MSB R/W ACKLSB ACK
Slave Address Repeated if more Bytes are transferred
Page 16 ams Datasheet
Document Feedback [v1-07] 2016-Sep-09
AS5601 − Detailed Description
AS5601 Slave Modes
Slave Receiver Mode (Write Mode)
Serial data and clock are received through SDA and SCL. Each
byte is followed by an acknowledge bit or by a NACK depending
on whether the address pointer selects a valid address. START
and STOP conditions are recognized as the beginning and end
of a bus transaction. The slave address byte is in the first byte
received after the START condition. The 7-bit AS5601 address is
0x36 (0110110 in binary).
The 7-bit slave address is followed by the direction bit (R/W),
which, for a write, is 0 (low). After receiving and decoding the
slave address byte, the slave device drives an acknowledge on
SDA. After the AS5601 acknowledges the slave address and
write bit, the master transmits a register address (word address)
to the AS5601. This is loaded into the address pointer on the
AS5601. If the address is a valid readable address, the AS5601
answers by sending an acknowledge (A bit low). If the address
pointer selects an invalid address, a NACK is sent (A bit high).
The master may then transmit zero or more bytes of data. If the
address pointer selects an invalid address, the received data are
not stored. The address pointer will increment after each byte
transferred whether or not the address is valid. If the address
pointer reaches a valid position again, the AS5601 answers with
an acknowledge and stores the data. The master generates a
STOP condition to terminate the write transaction.
Figure 16:
Data Write (Slave Receiver Mode)
S0110110 0 A XXXXXXXX AXXXXXXXX AXXXXXXXX A
S – Start
A – Acknowledge (ACK) Data transferred: X+1 Bytes + Acknowledge
P – Stop
P
<Slave address> <Word address (n)> <Data(n)> <Data(n+X)>
<RW>
XXXXXXXX A
<Data(n+1)>
ams Datasheet Page 17
[v1-07] 2016-Sep-09 Document Feedback
AS5601 − Detailed Description
Slave Transmitter Mode (Read Mode)
The first byte is received and handled as in the slave receiver
mode. However, in this mode, the direction bit indicates that
the AS5601 will drive data on SDA. START and STOP conditions
are recognized as the beginning and end of a bus transaction.
The slave address byte is the first byte received after the master
generates a START condition. The slave address byte contains
the 7-bit AS5601 address. The 7-bit slave address is followed by
the direction bit (R/W), which, for a read, is 1 (high). After
receiving and decoding the slave address byte, the slave device
drives an acknowledge on the SDA line. The AS5601 then begins
to transmit data starting with the register address pointed to
by the address pointer. If the address pointer is not written
before the initiation of a read transaction, the first address that
is read is the last one stored in the address pointer. The AS5601
must receive a not acknowledge (NACK) to end a read
transaction.
Figure 17:
Data Read (Slave Transmitter Mode)
S0110110 1 A XXXXXXXX AXXXXXXXX AXXXXXXXX NA
S – Start
A – Acknowledge (ACK) Data transferred: X+1 Bytes + Acknowledge
NA – Not Acknowledge (NACK) Note: Last data byte is followed by NACK
P – Stop
P
<Slave address> <Data(n)> <Data(n+1)> <Data(n+X)>
<RW>
XXXXXXXX A
<Data(n+2)>
Page 18 ams Datasheet
Document Feedback [v1-07] 2016-Sep-09
AS5601 − Detailed Description
Figure 18:
Data Read with Address Pointer Reload (Slave Transmitter Mode)
SDA and SCL Input Filters
Input filters for SDA and SCL inputs are included to suppress
noise spikes of less than 50 ns.
S0110110 0 A XXXXXXXX A0110110 1XXXXXXXXA
S – Start
Sr – Repeated Start
A – Acknowledge (ACK) Data transferred: X+1 Bytes + Acknowledge
NA – Not Acknowledge (NACK) Note: Last data byte is followed by NACK
P – Stop
P
<Slave address> <Word Address (n)> <Slave Address> <Data(n+1)>
<RW>
XXXXXXXXA
<Data(n)>
Sr
<RW>
AXXXXXXXX NA
<Data(n+X)>
Register Description
ams Datasheet Page 19
[v1-07] 2016-Sep-09 Document Feedback
AS5601 − Register Description
The following registers are accessible over the serial I²C
interface. The 7-bit device address of the AS5601 is 0x36
(0110110 in binary). To permanently program a configuration,
a non-volatile memory (OTP) is provided.
Figure 19:
Register Map
Note(s):
1. To change a configuration, read out the register, modify only the desired bits and write the new configuration. Blank fields may
contain factory settings.
2. During power-up, configuration registers are reset to the permanently programmed value. Not programmed bits are zero.
Address Name R/W Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Configuration Registers (1), (2)
0x00 ZMCO R ZMCO(1:0)
0x01
ZPOS R/W/P
ZPOS(11:8)
0x02 ZPOS(7:0)
0x07
CONF R/W/P
WD FTH(2:0) SF(1:0)
0x08 HYST(1:0) PM(1:0)
0x09 ABN R/W/P ABN(3:0)
0x0A PUSHTHR R/W/P PUSHTHR(7:0)
Output Registers
0x0C
RAW ANGLE
RRAW ANGLE(11:8)
0x0D R RAW ANGLE(7:0)
0x0E
ANGLE
R ANGLE(11:8)
0x0F R ANGLE(7:0)
Status Registers
0x0B STATUS RMDMLMH
0x1A AGC RAGC(7:0)
0x1B
MAGNITUDE
RMAGNITUDE (11:8)
0x1C R MAGNITUDE(7:0)
Burn Command
0xFF BURN W Burn_Angle = 0x80; Burn_Setting = 0x40
Register Description
Page 20 ams Datasheet
Document Feedback [v1-07] 2016-Sep-09
AS5601 − Register Description
ZPOS Registers
These registers are used to configure the zero position (ZPOS).
This register is used to align the electric grid of the incremental
output with the mechanical grid of an encoder switch.
CONF Register
The CONF register supports customizing the AS5601. Figure 20
shows the mapping of the CONF register.
PUSHTHR Register
This register is used to set-up the contactless pushbutton
function. This register must be adjusted according to the airgap
and magnet configuration. The swing of the pushbutton
function can be found by subtracting the AGC value of the
pressed button from the AGC value of the released button. The
threshold value for the contactless pushbutton should be half
of the swing.
Figure 20:
CONF and ABN Mapping
Note(s):
1. Forced in Low Power Mode (LPM)
Name Bit Position Description
CONF Mapping
PM(1:0) 1:0 Power Mode
00 = NOM, 01 = LPM1, 10 = LPM2, 11 = LPM3
HYST(1:0) 3:2 Hysteresis
00 = OFF, 01 = 1 LSB, 10 = 2 LSBs, 11 = 3 LSBs
SF(1:0) 9:8 Slow Filter
00 = 16x (1); 01 = 8x; 10 = 4x; 11 = 2x
FTH(2:0) 12:10
Fast Filter Threshold
000 = slow filter only, 001 = 6 LSBs, 010 = 7 LSBs, 011 = 9 LSBs,100 = 18
LSBs, 101 = 21 LSBs, 110 = 24 LSBs, 111 = 10 LSBs
WD 13 Watchdog Timer
0 = OFF, 1 = ON (automatic entry into LPM3 low-power mode enabled)
ABN Mapping
ABN(3:0) 3:0
Output Positions and Update Rate
0000 : 8 (61 Hz)
0001 : 16 (122 Hz)
0010 : 32 (244 Hz)
0011 : 64 (488 Hz)
0100 : 128 (976 Hz)
0101 : 256 (1.9 kHz)
0110 : 512 (3.9 kHz)
0111 : 1024 (7.8 kHz)
others : 2048 (15.6 kHz))
ams Datasheet Page 21
[v1-07] 2016-Sep-09 Document Feedback
AS5601 − Register Description
ANGLE/RAW ANGLE Register
The RAW ANGLE register contains the unscaled and unmodified
angle. The scaled output value is available in the ANGLE register.
Note(s): The ANGLE register has a 10-LSB hysteresis at the limit
of the 360 degree range to avoid discontinuity points or
toggling of the output within one rotation.
STATUS Register
The STATUS register provides bits that indicate the current state
of the AS5601.
Figure 21:
STATUS Register
AGC Register
The AS5601 uses automatic gain control (AGC) in a closed loop
to compensate for variations of the magnetic field strength due
to changes of temperature, airgap between IC and magnet, and
magnet degradation. The AGC register indicates the gain. For
the most robust performance, the gain value should be in the
center of its range. The airgap of the physical system can be
adjusted to achieve this value.
In 5V operation, the AGC range is 0-255 counts. The AGC range
is reduced to 0-128 counts in 3.3V mode.
MAGNITUDE Register
The MAGNITUDE register indicates the magnitude value of the
internal CORDIC output.
Non-Volatile Memory (OTP)
The non-volatile memory is used to permanently program the
configuration. To program the non-volatile memory, the I²C
interface is used. The programming can be either performed in
the 5V supply mode or in the 3.3V operation mode but using a
minimum supply voltage of 3.3V and a 10 μF capacitor at the
VDD3V3 pin to ground. This 10 μF capacitor is needed only
during the programming of the device. Two different
commands are used to permanently program the device:
Name State When Bit Is High
MH AGC minimum gain overflow, magnet too strong
ML AGC maximum gain overflow, magnet too weak
MD Magnet was detected
Page 22 ams Datasheet
Document Feedback [v1-07] 2016-Sep-09
AS5601 − Register Description
Burn_Angle Command (ZPOS)
The host microcontroller can perform a permanent
programming of ZPOS with a BURN_ANGLE command. To
perform a BURN_ANGLE command, write the value 0x80 into
register 0xFF. The BURN_ANGLE command can be executed up
to 3 times. ZMCO shows how many times ZPOS have been
permanently written.
This command may only be executed if the presence of the
magnet is detected (MD = 1).
Burn_Setting Command (CONF)
The host microcontroller can perform a permanent writing of
CONFIG with a BURN_SETTING command. To perform a
BURN_SETTING command, write the value 0x40 into register
0xFF.
The BURN_ SETTING command can be performed only one time.
Zero Position and Resolution Programming
A fundamental feature is to program the zero position (ZPOS)
of the magnetic position encoder. This is required to adjust the
A/B outputs to the mechanical pattern (grid) of a contactless
encoder by setting the count transitions (transition of A and or
B) between two adjacent mechanical positions. An example of
a 3-bit contactless encoder is shown in Figure 22.
The electrical positions represent the positions where an A or
B transition occurs. The zero position can be placed in
correspondence of one of the electrical positions (yellow).
A BURN_ANGLE command can be executed up to 3 times to
permanently program the zero position. It can only be executed
if the presence of the magnet is detected (MD = 1).
ams Datasheet Page 23
[v1-07] 2016-Sep-09 Document Feedback
AS5601 − Register Description
Figure 22:
Zero Position Setting of 3-Bit Encoder
Mechanical
position 1
Mechanical
position 2
Mechanical
position 8
Mechanical
position 3
Mechanical
position 4
Mechanical
position 6
Mechanical
position 5
Electrical
position 1
Electrical
position 2
Electrical
position 3
Electrical
position 4
Electrical
position 5
Electrical
position 6
Electrical
position 7
Electrical
position 8
Mechanical
position 7
Page 24 ams Datasheet
Document Feedback [v1-07] 2016-Sep-09
AS5601 − Register Description
The configuration procedure for a rotary encoder is shown
below in Figure 23.
Figure 23:
Zero Position and Resolution Programming Procedure
Note(s):
1. After each register command, the new setting is effective at the output at least 1 ms later.
2. It is highly recommended to perform a functional test after this procedure.
3. At least 1 ms after each register command the new setting is effective at the output.
4. The BURN_ANGLE command can be executed up to 3 times and only if the presence of the magnet is detected (MD = 1).
Use the correct hardware configuration as shown in Figure 34
Step 1 Power up the AS5601.
Step 2 Configure the desired number of positions using ABN(3:0).
Step 3
The mechanical configuration snapped into the grid.
Read out the actual RAW ANGLE.
Calculate the compensation value to adjust the mechanical grid and the encoder angle.
Refer to Figure 22 and Figure 24. Write the compensation value into ZPOS.
Wait at least 1ms.
Step 4 Write the required setting into the configuration register CONF and PUSHTHR.
Wait at least 1 ms.
Proceed with Step 5 to permanently program the configuration.
Step 5 Perform a BURN_ANGLE command to permanently program the zero position.
Wait at least 1 ms.
Step 6 Perform a Burn_Setting command to permanently program the configuration.
Wait at least 1 ms.
Step 7
Verify the BURN commands:
Write the commands 0x01, 0x11 and 0x10 sequentially into the register 0xFF to load the
actual OTP content.
Read and verify the permanently programmed registers to verify that the
BURN_SETTINGS and BURN_ANGLE command was successful.
Step 8 Read and verify the permanently programmed registers again after a new power-up cycle.
>4 >< )4="">
ams Datasheet Page 25
[v1-07] 2016-Sep-09 Document Feedback
AS5601 − Register Description
Quadrature Encoder Output
With the setting ABN(3:0) it is possible to configure the number
of positions of the quadrature output. An example for a
configuration with 8 positions is shown below.
Figure 24:
Example Quadrature Output for 8 Positions
A
B
Position 012345678N
N-1N-2
N-3
Period
12
N/4N/4-1
Page 26 ams Datasheet
Document Feedback [v1-07] 2016-Sep-09
AS5601 − Register Description
Absolute Position Feature for Quadrature
Output
The absolute angular position of the magnet is transmitted on
the quadrature output of the position sensor after startup. By
counting these pulses after startup, the absolute position
within one turn of an encoder knob is known without separate
initialization as shown in Figure 25.
Figure 25:
Example Quadrature Output for Position 8dec After Startup
time
Transmitting absolute
position „8 dec after startup
A
B
Position
012345678 16 17 18 19 20 21 22 23 24
Slower movement to
position „16 dec
Fast er move me nt t o
position „32 dec
25 26 27 28 29 30 31 3214 15910111213
Startup Position
Faster
Rotation
Slower
Rotation
NO
Rotation
Absolut
position
known
?
ams Datasheet Page 27
[v1-07] 2016-Sep-09 Document Feedback
AS5601 − Register Description
Pushbutton Detection
The AS5601 implements a pushbutton detection function
through a dynamic and relative measurement of the orthogonal
magnetic field strength. This pushbutton detection function
drives the PUSH output pin high when the AS5601 detects a
fast increase of the magnetic field (decrease of the airgap
between the magnet and the AS5601). After a fast decrease of
the magnetic field, the PUSH output is driven low.
Figure 26:
Pushbutton Detection Function Specifications
Symbol Parameter Conditions Min Max Unit
PUSHTHR Magnetic field threshold 0 255 LSB
tpu_slope Push slope time 500 ms
tpu_dur
Push duration time NOM,
LPM1 PM = 0X 10 10000 ms
Push duration time LPM2 PM = 10 40 10000 ms
Push duration time LPM3 PM = 11 150 10000 ms
tpu_relax
Time gap between two
consecutive pushes in
NOM, LPM1
PM = 0X 40 ms
Time gap between two
consecutive pushes in
LPM2
PM = 10 40 ms
Time gap between two
consecutive pushes in
LPM3
PM = 11 150 ms
tpu_min_pulse Minimum duration of the
PUSH pulse 40 50 ms
tpu_recovery Recovery time after a very
long pushbutton event 5000 ms
BTH_VAR Push amplitude variation -20 +20 %
Page 28 ams Datasheet
Document Feedback [v1-07] 2016-Sep-09
AS5601 − Register Description
Figure 27:
Pushbutton Detection Function
The AS5601 continuously measures the magnetic field
intensity. The programmable threshold (PUSHTHR) is applied to
a long time average of the magnetic field. A crossing of the
current magnetic field and the threshold within a specified time
(tpu_slope) drives the PUSH output high.
Slow changes of the magnetic field, due for example to
temperature variations, magnet drift mechanical tolerances,
etc. do not generate any pushbutton detection events. The
push detection threshold follows the drifts over the time as
shown in Figure 28.
PUSHTHR
tpu_slope tpu_dur tpu_slope tpu_relax time
Measured magnetic
field
Present measured
magnetic field
(button released)
Present measured
magnetic field
(button pressed)
PUSH
time
Push detection treshold
(long time averaged)
PUSHTHR Lang ‘ime averaged magne‘ic field
ams Datasheet Page 29
[v1-07] 2016-Sep-09 Document Feedback
AS5601 − Register Description
Figure 28:
Magnetic Field Threshold Over Time
Step Response and Filter Settings
The AS5601 has a digital post-processing programmable filter
which can be set in fast or slow modes. The fast filter mode can
be enabled by setting a fast filter threshold in the FTH bits of
the CONF register.
If the fast filter is OFF, the step output response is controlled by
the slow linear filter as shown in Figure 30. The step response
of the slow filter is programmable with the SF bits in the CONF
register. Figure 29 shows the tradeoff between delay and noise
for the different SF bit settings.
Figure 29:
Step Response Delay vs. Noise Band
SF Step Response
Delay (ms)
Max. RMS Output Noise
(1 Sigma) (Degree)
00 2.2 0.015
01 1.1 0.021
10 0.55 0.030
11 0.286 0.043
PUSHTHR
time
Long time averaged
magnetic field
Long time averaged
magnetic field
Push detection
treshold
Page 30 ams Datasheet
Document Feedback [v1-07] 2016-Sep-09
AS5601 − Register Description
Figure 30:
Step Response (fast filter OFF)
For a fast step response and low noise after settling, the fast
filter can be enabled. The fast filter works only if the input
variation is greater than the fast filter threshold, otherwise the
output response is determined only by the slow filter. The fast
filter threshold is programmed with the FTH bits in the CONF
register. As shown in Figure 32, the fast filter (corresponds with
SF=11) kicks in and takes care of a fast settling. The larger noise
band of the fast filter is reduced again after the slow filter
(depicted is setting SF=00) has taken over. The different noise
bands are shown in Figure 29.
Figure 31:
Fast Filter Threshold
FTH
Fast Filter Threshold (LSB)
Slow-to-Fast Filter Fast-to-Slow Filter
000 Slow Filter Only
001 6 1
010 7 1
011 9 1
100 18 2
101 21 2
110 24 2
111 10 4
Input
Output
response
Sampling
Frequency Settling Time
according slow filter setting
Noise
ams Datasheet Page 31
[v1-07] 2016-Sep-09 Document Feedback
AS5601 − Register Description
Figure 32:
Step Response (fast filter ON)
Hysteresis
To suppress spurious toggling of the output when the magnet
is not moving, a 1 to 3 LSB hysteresis of the 12-bit resolution
can be enabled with the HYST bits in the CONF register.
Magnet Detection
As a safety and diagnostic feature, the AS5601 indicates the
absence of the magnet. If the measured magnet field strength
goes below the minimum specified level (Bz_ERROR),
quadrature output is not updated and the MD bit in the STATUS
register is 0.
Input
Sampling
Frequency Settling Time
according slow filter setting
Noise
Fast Filter Noise
slow filter
Output
response
Fast filter step response
Threshold
Page 32 ams Datasheet
Document Feedback [v1-07] 2016-Sep-09
AS5601 − Register Description
Low Power Modes
A digital state machine automatically manages the low power
modes to reduce the average current consumption. Three
low-power modes are available and can be enabled with the
PM bits in the CONF register.
In a low-power mode, the fast filter is automatically disabled,
because there is no need for a fast settling time if the output
refresh is as fast as the polling cycles.
Watchdog Timer
The watchdog timer allows saving power by switching into
LMP3 if the angle stays within the watchdog threshold of 4 LSB
for at least one minute, as shown in Figure 33. The watchdog
function can be enabled by setting the WD bit in the CONF
register.
Figure 33:
Watchdog Timer Function
1 minute
Watchdog
threshold
LPM3 NOM,LPM1,
LPM2
NOM,LPM1,
LPM2
Output Value
4 LSB
ams Datasheet Page 33
[v1-07] 2016-Sep-09 Document Feedback
AS5601 − Application Information
Schematic
All required external components are shown below for the
reference application diagram. To improve EMC and for remote
applications, consider additional protection circuitry.
Figure 34:
Application Diagram for Angle Readout and Programming
Figure 35:
Recommended External Components
Note(s):
1. Given parameter characteristics have to be fulfilled over operation temperature and product lifetime
Component Symbol Value Units Notes
VDD5V buffer capacitor C1 100 nF 20%
LDO regulator capacitor C2 1 μF 20%; < 100 mΩ; Low
ESR ceramic capacitor
Optional pull-up for I²C bus RPU 4.7 kΩrefer to UM10204 for
pull-up sizing
Application Information
A
To MCU
4.5-5.5V
GND
AS5601
1 VDD5V
2 VDD3V3
3 PUSH
4 GND
A 8
SCL 7
SDA 6
B 5
PUSH
R
PU
R
PU
C1 C2
5V Operation
3-3.6V*
3.3V Operation
A
To MCU
GND
AS5601
1 VDD5V
2 VDD3V3
3 PUSH
4 GND
A 8
SCL 7
SDA 6
B 5
PUSH
R
PU
R
PU
C1 C**
* Supply voltage for permanent programming is 3.3–3.5V
** 10µF Capacitor required during permanent programming
BB
Page 34 ams Datasheet
Document Feedback [v1-07] 2016-Sep-09
AS5601 − Application Information
Magnet Requirements
The AS5601 requires a minimum magnetic field component Bz
perpendicular to the sensitive area on the chip. The center of
the sensitive area is in the center of the package.
Along the circumference of the Hall element circle the magnetic
field Bz should be sine-shaped. The magnetic field gradient of
Bz along the radius of the circle should be in the linear range
of the magnet to eliminate displacement error by the
differential measurement principle.
Figure 36:
Magnetic Field Bz and Typical Airgap
The typical airgap is between 0.5 mm and 3 mm, and it depends
on the selected magnet. A larger and stronger magnet allows a
larger airgap. Using the AGC value as a guide, the optimal airgap
can be found by adjusting the distance between the magnet
and the AS5601 so that the AGC value is in the center of its
range. The maximum allowed displacement of the rotational
axis of the reference magnet from the center of the package is
0.25 mm when using a magnet with a diameter of 6mm.
0.5mm - 3mm typ.
; 0459:0100 «043520.100 JP ‘1.161:D‘150
ams Datasheet Page 35
[v1-07] 2016-Sep-09 Document Feedback
AS5601 − Application Information
Mechanical Data
The internal Hall elements are located in the center of the
package on a circle with a radius of 1 mm.
Figure 37:
Hall Element Positions
Note(s):
1. All dimensions in mm.
2. Die thickness 356μm nom.
DMII 2x “MI Ex Me TIPS we; k4 mm VIEW C SEE VIEW [2/ VIEW AiA h h / / D c F La I 5mm pLANE / SECTIDN BiB
Page 36 ams Datasheet
Document Feedback [v1-07] 2016-Sep-09
AS5601 − Package Drawings & Markings
Figure 38:
SOIC8 Package Outline Drawing
Note(s):
1. Dimensions & tolerancing confirm to ASME Y14.5M-1994.
2. All dimensions are in millimeters. Angles are in degrees.
Package Drawings & Markings
Symbol Min Nom Max
A--1.75
A1 0.10 - 0.25
A2 1.25 - -
b 0.31 - 0.51
c 0.17 - 0.25
D - 4.90 BSC -
E - 6.00 BSC -
E1 - 3.90 BSC -
e - 1.27 BSC -
L 0.40 - 1.27
L1 - 1.04 REF -
L2 - 0.25 BSC -
R0.07- -
R1 0.07 - -
h 0.25 - 0.50
Q0º-8º
Q1 - 15º
Q2 0º - -
aaa - 0.10 -
bbb - 0.20 -
ccc - 0.10 -
ddd - 0.25 -
eee - 0.10 -
fff - 0.15 -
ggg - 0.15 -
Green
RoHS
ams Datasheet Page 37
[v1-07] 2016-Sep-09 Document Feedback
AS5601 − Package Drawings & Markings
Figure 39:
Package Marking
Figure 40:
Packaging Code
YY WW RZZ @
Last two digits of the
manufacturing year Manufacturing week Plant identifier Free choice/traceability
code Sublot identifier
AS5601
YYWWRZZ
@
Page 38 ams Datasheet
Document Feedback [v1-07] 2016-Sep-09
AS5601 − Ordering & Contact Information
Figure 41:
Ordering Information
Buy our products or get free samples online at:
www.ams.com/ICdirect
Technical Support is available at:
www.ams.com/Technical-Support
Provide feedback about this document at:
www.ams.com/Document-Feedback
For further information and requests, e-mail us at:
ams_sales@ams.com
For sales offices, distributors and representatives, please visit:
www.ams.com/contact
Headquarters
ams AG
Tobelbader Strasse 30
8141 Premstaetten
Austria, Europe
Tel: +43 (0) 3136 500 0
Website: www.ams.com
Ordering Code Package Marking Delivery Form Delivery Quantity
AS5601-ASOT SOIC-8 AS5601 13” Tape & Reel in dry pack 2500 pcs
AS5601-ASOM SOIC-8 AS5601 7” Tape & Reel in dry pack 500 pcs
Ordering & Contact Information
ams Datasheet Page 39
[v1-07] 2016-Sep-09 Document Feedback
AS5601 − RoHS Compliant & ams Green Statement
RoHS: The term RoHS compliant means that ams AG products
fully comply with current RoHS directives. Our semiconductor
products do not contain any chemicals for all 6 substance
categories, including the requirement that lead not exceed
0.1% by weight in homogeneous materials. Where designed to
be soldered at high temperatures, RoHS compliant products are
suitable for use in specified lead-free processes.
ams Green (RoHS compliant and no Sb/Br): ams Green
defines that in addition to RoHS compliance, our products are
free of Bromine (Br) and Antimony (Sb) based flame retardants
(Br or Sb do not exceed 0.1% by weight in homogeneous
material).
Important Information: The information provided in this
statement represents ams AG knowledge and belief as of the
date that it is provided. ams AG bases its knowledge and belief
on information provided by third parties, and makes no
representation or warranty as to the accuracy of such
information. Efforts are underway to better integrate
information from third parties. ams AG has taken and continues
to take reasonable steps to provide representative and accurate
information but may not have conducted destructive testing or
chemical analysis on incoming materials and chemicals. ams AG
and ams AG suppliers consider certain information to be
proprietary, and thus CAS numbers and other limited
information may not be available for release.
RoHS Compliant & ams Green
Statement
Page 40 ams Datasheet
Document Feedback [v1-07] 2016-Sep-09
AS5601 − Copyright s & Disclaimer
Copyright ams AG, Tobelbader Strasse 30, 8141 Premstaetten,
Austria-Europe. Trademarks Registered. All rights reserved. The
material herein may not be reproduced, adapted, merged,
translated, stored, or used without the prior written consent of
the copyright owner.
Devices sold by ams AG are covered by the warranty and patent
indemnification provisions appearing in its General Terms of
Trade. ams AG makes no warranty, express, statutory, implied,
or by description regarding the information set forth herein.
ams AG reserves the right to change specifications and prices
at any time and without notice. Therefore, prior to designing
this product into a system, it is necessary to check with ams AG
for current information. This product is intended for use in
commercial applications. Applications requiring extended
temperature range, unusual environmental requirements, or
high reliability applications, such as military, medical
life-support or life-sustaining equipment are specifically not
recommended without additional processing by ams AG for
each application. This product is provided by ams AG “AS IS”
and any express or implied warranties, including, but not
limited to the implied warranties of merchantability and fitness
for a particular purpose are disclaimed.
ams AG shall not be liable to recipient or any third party for any
damages, including but not limited to personal injury, property
damage, loss of profits, loss of use, interruption of business or
indirect, special, incidental or consequential damages, of any
kind, in connection with or arising out of the furnishing,
performance or use of the technical data herein. No obligation
or liability to recipient or any third party shall arise or flow out
of ams AG rendering of technical or other services.
Copyrights & Disclaimer
ams Datasheet Page 41
[v1-07] 2016-Sep-09 Document Feedback
AS5601 − Document Status
Document Status Product Status Definition
Product Preview Pre-Development
Information in this datasheet is based on product ideas in
the planning phase of development. All specifications are
design goals without any warranty and are subject to
change without notice
Preliminary Datasheet Pre-Production
Information in this datasheet is based on products in the
design, validation or qualification phase of development.
The performance and parameters shown in this document
are preliminary without any warranty and are subject to
change without notice
Datasheet Production
Information in this datasheet is based on products in
ramp-up to full production or full production which
conform to specifications in accordance with the terms of
ams AG standard warranty as given in the General Terms of
Trade
Datasheet (discontinued) Discontinued
Information in this datasheet is based on products which
conform to specifications in accordance with the terms of
ams AG standard warranty as given in the General Terms of
Trade, but these products have been superseded and
should not be used for new designs
Document Status
Page 42 ams Datasheet
Document Feedback [v1-07] 2016-Sep-09
AS5601 − Revision Information
Note(s):
1. Page and figure numbers for the previous version may differ from page and figure numbers in the current revision.
2. Correction of typographical errors is not explicitly mentioned.
Changes from 1-06 (2016-Apr-22) to current revision 1-07 (2016-Sep-09) Page
Updated ANGLE/RAW ANGLE Register 21
Revision Information
ams Datasheet Page 43
[v1-07] 2016-Sep-09 Document Feedback
AS5601 − Content Guide
1 General Description
1 Key Benefits & Features
2 Applications
2 Block Diagram
3 Pin Assignments
3 Pin Description
4Absolute Maximum Ratings
5 Electrical Characteristics
5 Operating Conditions
6 Digital Inputs and Outputs
6 Timing Characteristics
7 Magnetic Characteristics
7 System Characteristics
8 Detailed Description
8Power Management
10 I²C Interface
10 I²C Interface Operation
11 I²C Electrical Specification
12 I²C Timing
13 I²C Modes
13 Invalid Addresses
13 Reading
13 Writing
13 Supported Bus Protocol
14 Bus Not Busy
14 Start Data Transfer
14 Stop Data Transfer
14 Data Valid
14 Acknowledge
16 AS5601 Slave Modes
16 Slave Receiver Mode (Write Mode)
17 Slave Transmitter Mode (Read Mode)
18 SDA and SCL Input Filters
19 Register Description
20 ZPOS Registers
20 CONF Register
20 PUSHTHR Register
21 ANGLE/RAW ANGLE Register
21 STATUS Register
21 AGC Register
21 MAGNITUDE Register
21 Non-Volatile Memory (OTP)
22 Burn_Angle Command (ZPOS)
22 Burn_Setting Command (CONF)
22 Zero Position and Resolution Programming
25 Quadrature Encoder Output
26 Absolute Position Feature for Quadrature Output
27 Pushbutton Detection
29 Step Response and Filter Settings
Content Guide
Page 44 ams Datasheet
Document Feedback [v1-07] 2016-Sep-09
AS5601 − Content Guide
31 Hysteresis
31 Magnet Detection
32 Low Power Modes
32 Watchdog Timer
33 Application Information
33 Schematic
34 Magnet Requirements
35 Mechanical Data
36 Package Drawings & Markings
38 Ordering & Contact Information
39 RoHS Compliant & ams Green Statement
40 Copyrights & Disclaimer
41 Document Status
42 Revision Information

Products related to this Datasheet

SENSOR ANGLE SMD
Available Quantity: 5,000
Unit Price: 1.85844
SENSOR ANGLE SMD
Available Quantity: 595
Unit Price: 3.06
SENSOR ANGLE SMD
Available Quantity: 5,416
Unit Price: 4.08
ADAPTER BOARD FOR AS5601
Available Quantity: 26
Unit Price: 16.76
EVAL BOARD FOR AS5601
Available Quantity: 7
Unit Price: 57.75
REF MODULE FOR AS5601
Available Quantity: 2
Unit Price: 164.06
SENSOR ANGLE SMD
Available Quantity: 0
Unit Price: 1.635
SENSOR ANGLE SMD
Available Quantity: 5,416
Unit Price: 4.08
SENSOR ANGLE SMD
Available Quantity: 595
Unit Price: 3.06