AS5161-HSOM - AMS AG - Datasheet.Live

ams Datasheet Page 1

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AS5161

12-Bit Magnetic Angle Position Sensor

The AS5161 is a contactless magnetic angle position sensor for

accurate angular measurement over a full turn of 360°. A sub

range can be programmed to achieve the best resolution for

the application. It is a system-on-chip, combining integrated

Hall elements, analog front end, digital signal processing and

best in class automotive protection features in a single device.

To measure the angle, only a simple two-pole magnet, rotating

over the center of the chip, is required. The magnet may be

placed above or below the IC.

The absolute angle measurement provides instant indication of

the magnet’s angular position with a resolution of

0.022° = 16384 positions per revolution. According to this

resolution the adjustment of the application specific

mechanical positions are possible. The angular output data is

available over a 12 bit pulse width modulated (PWM) output.

The AS5161 operates at a supply voltage of 5V and the supply

and output pins are protected against overvoltage up to +20V.

In addition the supply pins are protected against reverse

polarity up to –20V.

Figure 1:

Typical Arrangement of AS5161 and Magnet

Ordering Information and Content Guide appear at end of

datasheet.

General Description

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AS5161 − General Description

Key Benefits & Features

The benefits and features of AS5161, 12-Bit Magnetic Angle

Position Sensor are listed below:

Figure 2:

Added Value of Using AS5161

Applications

The AS5161 is ideal for automotive applications like:

•Throttle and valve position sensing

•Gearbox position sensor

•Tumble flap

•Chassis height level

•Pedal position sensing

•Contactless potentiometers

Benefits Features

•Great flexibility on angular excursion •360º contactless high resolution angular position sensing

•Simple programming

•User programmable start and end point of the

application region

•Saw tooth mode 1-4 slopes per revolution

•Clamping levels

•Transition point

•Failure diagnostics •Broken GND and VDD detection for all external load cases

•High-resolution output signal •12-Bit pulse width modulated (PWM) output

•Ideal for applications in harsh

environments due to contactless

position sensing

•Wide temperature range: - 40°C to 150°C

ams Datasheet Page 3

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AS5161 − General Description

Block Diagram

The functional blocks of this device are shown below:

Figure 3:

AS5161 Block Diagram

OUT

VDD

VDD3V3

AS5161

OTP Register

(Programming

Parameters)

Sin

Cos

Hall Array

Frontend

Amplifier

ADC Controller

GND

High Voltage/

Reverse Polarity

Protection

LS Driver

DSP

CORDIC PWM

Single Pin

Interface

(UART)

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AS5161 − Pin Assignment

Figure 4:

SOIC-8 Pin Configuration

Figure 5:

Pin Description

Number

Name Pin Type Description

1 VDD Supply pin Positive supply pin. This pin is over voltage protected.

2TP1

DIO/AIO

multi purpose pin

Test pin for fabrication. Connected to ground in the

application board.

3 VDD3V3 AIO Output of the internal voltage regulator

4 GND Supply pin Ground pin. Connected to ground in the application.

5TP2

DIO/AIO

multi purpose pin

Test pin for fabrication. Connected to ground in the

application board.

6TP3

DIO/AIO

multi purpose pin Test pin for fabrication. Open in the application.

7SAIO Test pin for fabrication. Connected to OUT in the

application board.

8OUT

DIO/AIO

multi purpose pin

Digital PWM output pin. Over this pin the programming

is possible. Open drain configuration.

Pin Assignment

VDD

TP1

VDD3V3

GND TP2

TP3

OUT

AS5161

ams Datasheet Page 5

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AS5161 − Absolute Maximum Ratings

Stresses beyond those listed in Absolute Maximum Ratings may

cause permanent damage to the device. These are stress ratings

only, and functional operation of the device at these or any

other conditions beyond those indicated in Electrical

Characteristics is not implied. Exposure to absolute maximum

rating conditions for extended periods may affect device

reliability.

Figure 6:

Absolute Maximum Ratings

Symbol Parameter Min Max Units Comments

Electrical Parameters

VDD DC supply voltage at pin

VDD Overvoltage -20 20 V No operation

VOUT Output voltage OUT -0.3 20 V Permanent

Vdiff Voltage difference at pin

VDD and OUT -20 20 V

VDD3V3

DC supply voltage at pin

VDD3V3 -0.3 5 V

Iscr Input current

(latchup immunity) -100 100 mA Norm: AEC-Q100-004

Electrostatic Discharge

ESD Electrostatic discharge ±2 kV Norm: AEC-Q100-002

Temperature Ranges and Storage Conditions

Tstrg Storage temperature -55 150 ºC Min -67ºF; Max 302ºF

TBody Body temperature 260 ºC

The reflow peak soldering

temperature (body temperature)

specified is in accordance with

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 Represents a maximum floor life

time of 168h

Absolute Maximum Ratings

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AS5161 − Electrical Characteristics

Operating Conditions

In this specification, all the defined tolerances for external

components need to be assured over the whole operation

conditions range and also over lifetime.

Figure 7:

Operating Conditions

Magnetic Input Specification

TAMB = -40ºC to 150ºC, VDD = 4.5V to 5.5V (5V operation), unless

otherwise noted.

Two-Pole Cylindrical Diametrically Magnetized Source

Figure 8:

Magnetic Input Specification

Symbol Parameter Conditions Min Typ Max Units

TAMB Ambient temperature -40 150 ºC

Isupp Supply current 10 mA

VDD Supply voltage at pin VDD 4.5 5.0 5.5 V

Symbol Parameter Conditions Min Typ Max Units

Bpk Magnetic input field

amplitude

Required vertical component

of the magnetic field strength

on the die’s surface, measured

along a concentric circle with a

radius of 1.25 mm

30 70 mT

Bpkext

Magnetic input field

amplitude (extended)

default setting

Required vertical component

of the magnetic field strength

on the die’s surface, measured

along a concentric circle with a

radius of 1.25 mm. Increased

sensor output noise.

10 90 mT

Boff Magnetic offset Constant magnetic stray field ± 5 mT

Disp Displacement radius

Offset between defined device

center and magnet axis

including eccentricity.

Dependent on the selected

magnet.

1mm

Electrical Characteristics

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AS5161 − Electrical Characteristics

Electrical System Specifications

TAMB = -40ºC to 150ºC, VDD = 4.5V to 5.5V (5V operation),

Magnetic Input Specification, unless otherwise noted.

Figure 9:

Electrical System Specifications

Figure 10:

Power-Up Timing Diagram

Symbol Parameter Conditions Min Typ Max Units

RES Resolution PWM Output Range > 90º 12 bit

INLopt Integral non-linearity

(optimum)

Best aligned reference

magnet at 25ºC over full turn

360º

0.5 deg

INLtemp Integral non-linearity

(optimum)

Best aligned reference

magnet over temperature

-40º to 150º over full turn

360º

0.9 deg

INL Integral non-linearity

Best aligned reference

magnet over temperature

-40º to 150º over full turn

360º and displacement

1.4 deg

DNL Differential non-linearity Monolitic 0.05 deg

ON Output noise

(360º segment)

1 LSB after filter peak/peak

rms value 0.2 % DC

tPwrUp Power-up time 0-5V See Figure 10 10 ms

tdelay

System propagation delay

absolute output: delay of

ADC, DSP and absolute

interface

10kΩ, 100 μF RC filter 300 μs

OUT pin in HiZ First Valid Data on OUT pin

tPwrUp

4.5V

VDD

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AS5161 − Electrical Characteristics

Timing Characteristics

Figure 11:

Timing Conditions

Power Management - Supply Monitor

Figure 12:

Power Management - Supply Monitor Conditions

Symbol Parameter Conditions Min Typ Max Units

TDETWD WachDog error detection time 12 ms

Symbol Parameter Conditions Min Typ Max Units

VDDUVTH VDD undervoltage upper

threshold 3.5 4.0 4.5 V

VDDUVTL VDD undervoltage lower

threshold 3.0 3.5 4.0 V

VDDUVHYS VDD undervoltage hysteresis 300 500 900 mV

VDDUVDET VDD undervoltage detection

time 10 50 250 μs

VDDUVREC VDD undervoltage recovery

time 10 50 250 μs

VDDOVTH VDD overvoltage upper

threshold 6.0 6.5 7.0 V

VDDOVTL VDD overvoltage lower

threshold 5.5 6 6.5 V

VDDOVHYS VDD overvoltage hysteresis 300 500 900 mV

ANATOVDET VDD overvoltage detection

time (analog path) 10 50 250 μs

ANATOVREC VDD overvoltage recovery time

(analog path) 10 50 250 μs

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AS5161 − Detailed Description

The AS5161 is manufactured in a CMOS process and uses a

spinning current Hall technology for sensing the magnetic field

distribution across the surface of the chip.

The integrated Hall elements are placed around the center of

the device and deliver a voltage representation of the magnetic

field at the surface of the IC.

Through Sigma-Delta Analog / Digital Conversion and Digital

Signal-Processing (DSP) algorithms, the AS5161 provides

accurate high-resolution absolute angular position

information. For this purpose a Coordinate Rotation Digital

Computer (CORDIC) calculates the angle and the magnitude of

the Hall array signals.

The DSP is also used to provide digital information at the

outputs that indicate movements of the used magnet towards

or away from the device’s surface.

A small low cost diametrically magnetized (two-pole) standard

magnet provides the angular position information.

The AS5161 senses the orientation of the magnetic field and

calculates a 14-bit binary code. This code is mapped to a

programmable output characteristic in a PWM duty cycle

format. This signal is available at the pin (OUT).

The application angular region can be programmed in a user

friendly way. The start angle position T1 and the end point T2

can be set and programmed according the mechanical range

of the application with a resolution of 14 bits. In addition the

T1Y and T2Y parameter can be set and programmed according

the application. The transition point 0 to 360 degree can be

shifted using the break point parameter BP. The voltage for

clamping level low CLL and clamping level high CLH can be

programmed with a resolution of 9 bits. Both levels are

individually adjustable.

The output parameters can be programmed in an OTP register.

No additional voltage is required to program the AS5161. The

setting may be overwritten at any time and will be reset to

default when power is cycled. To make the setting permanent,

the OTP register must be programmed by using a lock bit the

content could be frozen for ever.

The AS5161 is tolerant to magnet misalignment and unwanted

external magnetic fields due to differential measurement

technique and Hall sensor conditioning circuitry.

Detailed Description

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AS5161 − Detailed Description

Operation

VDD Voltage Monitor

VDD Over Voltage Management. If the supply voltage at pin

VDD exceeds the over-voltage upper threshold for longer than

the detection time the output is turned off. When the over

voltage event has passed and the voltage applied to pin VDD

falls below the over-voltage lower threshold for longer than the

recovery time the device enters the normal mode and the

output is enabled.

VDD Under Voltage Management. When the voltage applied

to the VDD pin falls below the under-voltage lower threshold

for longer than the detection time the output is turned off.

When the voltage applied to the VDD pin exceeds the

under-voltage upper threshold for longer than the detection

time the device enters the normal mode and the output is

enabled.

PWM Output

By default (after programmed CUST_LOCK OTP bit) the PWM

output mode is selected. The pin OUT provides a modulated

signal that is proportional to the angle of the rotating magnet.

Due to an intelligent approach a permanent short circuit will

not damage the device. This is also feasible in a high voltage

condition up to 20 V and at the highest specified ambient

temperature.

After the digital signal processing (DSP) a PWM engine provides

the output signal.

The DSP maps the application range to the output

characteristic. An inversion of the slope is also programmable

to allow inversion of the rotation direction.

An on-chip diagnostic feature handles the error state at the

output. Depending on the failure the output is in HiZ condition

or indicates a PWM signal within the failure bands of 4 –96%

duty cycle (see Figure 20).

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AS5161 − Detailed Description

Programming Parameters

The PWM output characteristic is programmable by OTP.

Depending on the application, the output can be adjusted. The

user can program the following application specific

parameters.

Figure 13:

Programming Parameters

These parameters are input parameters. Using the available

programming software and programmer these parameters are

converted and finally written into the AS5161 128 bit OTP

memory.

Parameter Description

T1 Mechanical angle start point

T2 Mechanical angle end point

T1Y % duty cycle level at the T1 position

T2Y % duty cycle level at the T2 position

CLL Clamping Level Low

CLH Clamping Level High

BP Break point (transition point 0 to 360º)

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AS5161 − Detailed Description

Application Specific Angular Range Programming

The application range can be selected by programming T1 with

a related T1Y and T2 with a related T2Y into the AS5161. The

clamping levels CLL and CLH can be programmed independent

from the T1 and T2 position and both levels can be separately

adjusted.

Figure 14:

Programming of an Individual Application Range

Figure 14 shows a simple example of the selection of the range.

The mechanical starting point T1 and the mechanical end point

T2 are defining the mechanical range. A sub range of the

internal CORDIC output range is used and mapped to the

needed output characteristic. The PWM output signal has 12

bit, hence the level T1Y and T2Y can be adjusted with this

resolution. As a result of this level and the calculated slope the

clamping region low is defined. The break point BP defines the

transition between CLL and CLH. In this example the BP is set

to 0 degree. The BP is also the end point of the clamping level

high CLH. This range is defined by the level CLH and the

calculated slope. Both clamping levels can be set

independently form each other.

CLL

CLH

T1 T2

100%DC

Application range

T1Y

T2Y

CLL

CLH

mechanical range

electrical range

clamping range

low

clamping range

high

270 degree

0 degree

180 degree

90 degree

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AS5161 − Detailed Description

Application Specific Programming of the Break Point

The break point BP can be programmed as well with 14 bits.

This is important when the default transition point is inside the

application range. In such a case the default transition point

must be shifted out of the application range. The parameter BP

defines the new position.

Figure 15:

Individual Programming of the Break Point BP

CLL

CLH

T1 T2

100%DC

Application range

T1Y

T2Y

CLL

CLH

mechanical range

electrical range

clamping range

low

clamping range

high

270 degree

0 degree

180 degree

90 degree

clamping range

low

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AS5161 − Detailed Description

Multiple Slope Output

The AS5161 can be programmed to multiple slopes. Where one

programmed reference slope characteristic is copied to

multiple slopes. Two, three and four slopes are selectable by the

user OTP bits QUADEN (1:0). In addition to the steepness of the

slope the clamping levels can be programmed as well.

Figure 16:

Two Slope Mode

Figure 17:

Four Slope Mode

Duty Cycle

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AS5161 − Detailed Description

Resolution of Parameters

The programming parameters have a wide resolution of up to

14 bits.

Figure 18:

Resolution of the Programming Parameters

Figure 19:

Overview of the Output Range

Figure 19 gives an overview of the different ranges. The failure

bands are used to indicate a wrong operation of the AS5161.

This can be caused due to a broken supply line. By using the

Symbol Parameter Resolution Note

T1 Mechanical angle start point 14 bits

T2 Mechanical angle stop point 14 bits

T1Y Mechanical start voltage level 12 bits

T2Y Mechanical stop voltage level 12 bits

CLL Clamping level low 9 bits

CLH Clamping level high 9 bits

BP Break point 14 bits

Clamping Region Low

Failure Band Low

CLL

CLH

100

Duty Cycle

Failure Band High

Application Region

Clamping Region High

T2Y

T1Y

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AS5161 − Detailed Description

specified load resistors, the output level will remain in these

bands during a fail. It is recommended to set the clamping level

CLL above the lower failure band and the clamping level CLH

below the higher failure band.

Figure 20:

Different Failure Cases of AS5161

For efficient use of diagnostics, it is recommended to program

to clamping levels CLL and CLH.

Type Failure Mode Symbol Failure Band Note

Internal alarms

(failures)

Out of magnetic range

(too less or too high

magnetic input)

MAGRng High/Low Programmable by OTP bit

DIAG_HIGH

CORDIC overflow COF High/Low Programmable by OTP bit

DIAG_HIGH

Offset compensation

finished OCF High/Low Programmable by OTP bit

DIAG_HIGH

Watchdog fail WDF High/Low Programmable by OTP bit

DIAG_HIGH

Oscillator fail OF High/Low Programmable by OTP bit

DIAG_HIGH

Application

related failures

Overvoltage condition OV

High

Dependant on the load

resistor

Pull up → failure band high

Broken VDD BVDD

Broken VSS BVSS

Short circuit output SCO High Switch off → short circuit

dependent

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AS5161 − Detailed Description

PWM Output Driver Parameters

The output stage is configured in a open drain output.

The PWM duty cycle represents the angular output data. All

programming features are available for the PWM mode as well.

The PWM period is programmable in four steps and can be

programmed by PWMF<2:0>.

CLOAD≤ 33 nF, RPU= 1kΩ to 10kΩ

Figure 21:

PWM Parameters Output Driver

Hysteresis Function

AS5161 device includes a hysteresis function to avoid sudden

jumps from CLH to CLL and vice versa caused by noise in the

full turn configuration.

The hysteresis amplitude can be selected via the OTP bits

HYSTSEL<1:0>.

Symbol Parameter Conditions Min Typ Max Units

PWMF1 PWM frequency 7 PWMF<2:0>=111 109.86 122 134.28 Hz

PWMF2 PWM frequency 6 PWMF<2:0>=110 179.78 200 219.73 Hz

PWMF3 PWM frequency 5 PWMF<2:0>=101 219.73 244 268.55 Hz

PWMF4 PWM frequency 4 PWMF<2:0>=100 329.59 366 402.83 Hz

PWMF5 PWM frequency 3 PWMF<2:0>=011 494.38 549 604.25 Hz

PWMF6 PWM frequency 2 PWMF<2:0>=010 659.18 732 805.66 Hz

PWMF7 PWM frequency 1 PWMF<2:0>=001 988.77 1100 1208.50 Hz

PWMF8 PWM frequency 0PWMF<2:0>=000 1977.54 2197 2416.2 Hz

PWMDC PWM duty cycle range info parameter 4 96 %

PWMVOL Output voltage low IOUT=5mA 0 0.4 V

PWMSRF PWM slew rate

(falling edge)

Between 75% and 25%

RPUOUT=4KΩ;

CLOUT=1nF

VDD=5V

124V / μs

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AS5161 − Application Information

Recommended Application Schematic

Figure 22 shows the recommended schematic in the

application. All components marked with (*) are optional and

can be used to further increase the EMC.

Figure 22:

Recommended Schematic of Pull-Up Configuration

Figure 23:

External Components

Symbol Parameter Min Typ Max Units Note

C1VDD buffer capacitor 0.8 1 1.2 μF Low ESR 0.3 Ω

C2VDD3V3 regulator capacitor 0.8 1 1.2 μF Low ESR 0.3 Ω

C3OUT load capacitor

(sensor PCB) 04.7nF

C4*VDD capacitor (optional) 4.7 nF

Do not increase due to

programming over

output.

R1*VDD serial resistor (optional) 10 Ω

CLOUT load capacitor (ECU) 0 33 nF

RLPU OUT pull-up resistance 1 10 kΩ

Application Information

AS5161

VDD

TP1

VDD3V3

GND TP2

TP3

OUT

Sensor PCB

Electric Control Unit

C4*

R1*RLPU

VDD

GND

OUT

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AS5161 − Application Information

Programming the AS5161

The AS5161 programming is a one-time-programming (OTP)

method, based on polysilicon fuses. The advantage of this

method is that no additional programming voltage is needed.

The internal LDO provides the current for programming.

The OTP consists of 128 bits; several bits are available for user

programming. In addition factory settings are stored in the OTP

memory. Both regions are independently lockable by build in

lock bits.

A single OTP cell can be programmed only once. Per default,

the cell is “0”; a programmed cell will contain a “1”. While it is

not possible to reset a programmed bit from “1” to “0”, multiple

OTP writes are possible, as long as only unprogrammed “0”-bits

are programmed to “1”.

Independent of the OTP programming, it is possible to

overwrite the OTP register temporarily with an OTP write

command. This is possible only if the user lock bit is not

programmed.

Due to the programming over the output pin the device will

initially start in the communication mode. In this mode the

digital angle value can be read with a specific protocol format.

It is a bidirectional communication possible. Parameters can be

written into the device. A programming of the device is

triggered by a specific command. With another command

(pass2func) the device can be switched into operation mode.

In case of a programmed user lock bit the AS5161 automatically

starts up in the functional operation mode. No communication

of the specific protocol is possible after this.

A standard half duplex UART protocol is used to exchange data

with the device in the communication mode.

UART Interface for Programming

The AS5161 uses a standard UART interface with an address

byte and two data bytes. The read or write mode is selected

with bit R/Wn in the first byte. The timing (baudrate) is selected

by the AS5161 over a synchronization frame. The baud rate

is used for synchronization.

A time out function detects not complete commands and resets

the AS5161 UART after the timeout period.

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AS5161 − Application Information

Frame Organization

Each frame is composed by 24 bits. The first byte of the frame

specifies the read/write operation with the register address. 16

data bits contains the communication data. There will be no

operation in case of the usage of a not specified CMD. The UART

programming interface block of the AS5161 can operate in

slave communication or master communication mode. In the

slave communication mode the AS5161 receives the data. The

programming tool is the driver of the single communication

line. In case of the master communication mode the AS5161

transmits data in the frame format. The single communication

line can be pulled down by the AS5161.

The UART frame consists of 1 start bit (low level), 8 data bit, 1

even-parity bit and 1 stop bit (high level). Data are transferred

from LSB to MSB.

Figure 24:

General UART Frame

Figure 25:

Bit Timing

Symbol Parameter Min Typ Max Unit Note

START Start bit 1 TBIT

Dx Data bit 1 TBIT

PAR Parity bit 1 TBIT

STOP Stop bit 1 TBIT

TSW Slave/Master Switch Time 7 TBIT

D0 D1 D2 D3 D4 D5 D6 D7 parstart stop

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AS5161 − Application Information

Each communication starts with the reception of a request from

the external controller. The request consists of two frames: one

synchronization frame and the command frame.

The synchronization frame contains the data 0x55 and allows

the UART to measure the external controller baud rate.

Figure 26:

Synchronization Frame

The second frame contains the command Read/ Write (1 bit)

and the address (7 bits).

Figure 27:

Address and Command Frame

Only two commands are possible. In case of read command the

idle phase between the command and the answer is the time

TSW. In case of parity error command is not executed.

Figure 28:

Possible Commands

Note(s) and/or Footnote(s):

1. In case of Write command the request is followed by the frames containing the data to write.

2. In case of Read command the communication direction will change and the AS5161 will answer with the frames containing the

requested data.

Possible Interface

Commands Description AS5X63

Communication Mode

Command

CMD

WRITE Write data to the OTP memory or

Registers SLAVE 0

READ Read data to the OTP memory or

Registers SLAVE & MASTER 1

start stopD0 D1 D2 D3 D4 D5 D6 D7 par

6R/Wn parstart stop

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AS5161 − Application Information

WRITE (Command Description)

Figure 29:

Full Write Command

•Writing the AS5161 KEY in the fuse register (address 0x41)

triggers the transfer of the data from the OTP RAM into

the Poly Fuse cell.

•Writing the AS5161 KEY in the Pass2Func Register (address

0x60) forces the device into normal mode.

AD0 AD1 AD2 AD3 AD4 parstart stop

AD5 AD6 R/

Write command frame

parstart stop

D00 D01 D02 D03 D05 D06 D07

Data1 frame (data to write on address AD<6:0>+1)

D04

parstart stop

D00 D01 D02 D03 D05 D06 D07

Data0 frame (data to write on address AD<6:0>)

D04

start stopD0 D1 D2 D3 D4 D5 D6 D7 par

Synchronization frame

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AS5161 − Application Information

READ (Command Description)

Figure 30:

Full Read Command

Baud-Rate Automatic Detection

The UART includes a built-in baud-rate monitor that uses the

synchronization frame to detect the external controller

baud-rate. This baud-rate is used after the synchronization byte

to decode the following frame and to transmit the answer and

it is stored in the BAUDREG register.

Baud-Rate Manual Setting (Optional)

The BAUDREG register can be read and over-written for a

possible manual setting of the baud-rate: in case the register is

overwritten with a value different from 0, this value will be used

for the following UART communications and the

synchronization frame must be removed from the request.

start stopD0 D1 D2 D3 D4 D5 D6 D7 par

Synchronization frame:

AD0 AD1 AD2 AD3 AD4 parstart stop

AD5 AD6 R/Wn

Read command frame:

parstart stop

D00 D01 D02 D03 D05 D06 D07

Data0 frame (data read from address AD<6:0>) (MASTER):

D04

parstart stop

D00 D01 D02 D03 D05 D06 D07

Data1 frame (data read from address AD<6:0>+1) (MASTER):

D04

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AS5161 − Application Information

Figure 31:

Manual Baud-Rate Setting

Figure 32:

Simple Read and Write

MSB

LSB

WR BAUDREG

Address

Start

R/n

Stop

S 0 01 10 10 1

MSB

LSB

High Byte

Start

Stop

S 0 00 00 00 0

MSB

LSB

Low Byte

Start

Stop

S P

AS5161 in Receiving Mode (Write Access)

Even Parity

01 01 01 01 0

MSB

LSB

IDLE

synch frame

Start

R/n

Stop

Even Parity

IDLE IDLE IDLE IDLE

MSB

LSB

IDLE

Reg. Address

Start

R/Wn

Stop

MSB

LSB

High Byte

Start

Stop

MSB

LSB

Low Byte

Start

Stop

IDLES P

AS5161 in Receiving

Mode AS5161 in transmitting mode (Read Access)

Even Parity

IDLE IDLE

MSB

LSB

IDLE

Reg. Address

Start

R/n

Stop

MSB

LSB

High Byte

Start

Stop

MSB

LSB

Low Byte

Start

Stop

IDLES P

AS5161 in Receiving

Mode AS5161 in Receiving Mode (Write Access)

Even Parity

IDLE IDLE

ams Datasheet Page 25

[v1-04] 2015-Dec-07 Document Feedback

AS5161 − Application Information

OTP Programming Data

Figure 33:

OTP Memory Map

Data Byte Bit

Number Symbol Default Description

DATA15 (0x0F)

Factory

Settings

ams (reserved)

Factory Settings

DATA14 (0x0E)

DATA13 (0x0D)

Page 26 ams Datasheet

Document Feedback [v1-04] 2015-Dec-07

AS5161 − Application Information

DATA13 (0x0D)

2CUSTID<0>0

Customer Identifier

Customer Settings

3CUSTID<1>0

4CUSTID<2>0

5CUSTID<3>0

6CUSTID<4>0

7CUSTID<5>0

DATA12 (0x0C) 0 CUSTID<6> 0

DATA11 (0x0B) 7CLH<0>0

Clamping Level High

DATA10 (0x0A)

0CLH<1>0

1CLH<2>0

2CLH<3>0

3CLH<4>0

4CLH<5>0

5CLH<6>0

6CLH<7>0

7CLH<8>0

Data Byte Bit

Number Symbol Default Description

ams Datasheet Page 27

[v1-04] 2015-Dec-07 Document Feedback

AS5161 − Application Information

DATA9 (0x09)

0CLL<0>0

Clamping Level Low

Customer Settings

1CLL<1>0

2CLL<2>0

3CLL<3>0

4CLL<4>0

5CLL<5>0

6CLL<6>0

7CLL<7>0

DATA8 (0x08)

0CLL<8>0

1 OFFSET<0> 0

Offset

2 OFFSET<1> 0

3 OFFSET<2> 0

4 OFFSET<3> 0

5 OFFSET<4> 0

6 OFFSET<5> 0

7 OFFSET<6> 0

DATA7 (0x07)

0 OFFSET<7> 0

1 OFFSET<8> 0

2 OFFSET<9> 0

3 OFFSET<10> 0

4 OFFSET<11> 0

5 OFFSET<12> 0

6 OFFSET<13> 0

7 OFFSET<14> 0

Data Byte Bit

Number Symbol Default Description

Page 28 ams Datasheet

Document Feedback [v1-04] 2015-Dec-07

AS5161 − Application Information

DATA6 (0x06)

0 OFFSET<15> 0

Offset

Customer Settings

1 OFFSET<16> 0

2 OFFSET<17> 0

3 OFFSET<18> 0

4 OFFSET<19> 0

5GAIN<0>0

Scale Factor

6GAIN<1>0

7GAIN<2>0

DATA5 (0x05)

0GAIN<3>0

1GAIN<4>0

2GAIN<5>0

3GAIN<6>0

4GAIN<7>0

5GAIN<8>0

6GAIN<9>0

7GAIN<10>0

DATA4 (0x04)

0GAIN<11>0

1GAIN<12>0

2GAIN<13>0

3GAIN<14>0

4GAIN<15>0

5GAIN<16>0

6BP<0>0

Break Point

7BP<1>0

Data Byte Bit

Number Symbol Default Description

ams Datasheet Page 29

[v1-04] 2015-Dec-07 Document Feedback

AS5161 − Application Information

DATA3 (0x003)

0BP<2>0

Break Point

Customer Settings

1BP<3>0

2BP<4>0

3BP<5>0

4BP<6>0

5BP<7>0

6BP<8>0

7BP<9>0

DATA2 (0x02)

0BP<10>0

1BP<11>0

2BP<12>0

3BP<13>0

4ANGLERNG0

Sector selection

0=Angular Sector≥22.5

degrees;

1=Angular Sector<22.5

degrees

5 DIAG_HIGH 0

Failure Band Selection

0=Failure Band Low

1=Failure Band High

6 QUADEN<0> 0 Quadrant Mode Enable

00=1quadrant;

01=2quadrants;

10=3 quadrants;

11=4 quadrants

7QUADEN<1>0

Data Byte Bit

Number Symbol Default Description

Page 30 ams Datasheet

Document Feedback [v1-04] 2015-Dec-07

AS5161 − Application Information

DATA1 (0x01)

0 AIRGAPSEL 0

Magnetic input range

extension

0:extended range;

1=normal range

Customer Settings

1 HYSTSEL<0> 0 Hysteresis selection

00=no hysteresis;

01: 56LSB;

10=91LSB;

11=137LSB

2HYSTSEL<1>0

3Not used0

4Not used0

5Not used0

6Not used0

7Not used0

DATA0 (0x00)

0 RED_ADD<0> 0

Redundancy Address

Identify the address of the

byte containing the bit to

be changed

1 RED_ADD<1> 0

2 RED_ADD<2> 0

3 RED_ADD<3> 0

4 RED_BIT<0> 0 Redundancy Bit

Identify the position of the

bit to be changed in the

byte at the address

RED_ADD<3:0>

5 RED_BIT<1> 0

6 RED_BIT<2> 0

7 CUST_LOCK 0 Lock bit for Customer Area

Data Byte Bit

Number Symbol Default Description

ams Datasheet Page 31

[v1-04] 2015-Dec-07 Document Feedback

AS5161 − Application Information

READ / WRITE Register Map

Figure 34:

Read/Write Registers

Data Byte Bit

Number Symbol Default Description

DATA0 (0x20)

0BAUDREG<0>0

UART Baud Rate Register

Read/Write Area

1BAUDREG<1>0

2BAUDREG<2>0

3BAUDREG<3>0

4BAUDREG<4>0

5BAUDREG<5>0

6BAUDREG<6>0

7BAUDREG<7>0

DATA1 (0x21)

0BAUDREG<8>0

1Not used0

A read command returns all

data bits at 0

2Not used0

3Not used0

4Not used0

5Not used0

6Not used0

7Not used0

DATA2 (0x22)

0Not used0

1Not used0

2Not used0

3Not used0

4Not used0

5 R1K10K<0> 0 Selection of the reference

resistance used for OTP

download

6 R1K10K<1> 0

7DSPRN0

Resetn of the Digital Signal

Processing circuit

Page 32 ams Datasheet

Document Feedback [v1-04] 2015-Dec-07

AS5161 − Application Information

READ Only Register Map

Figure 35:

Read Only Registers

Data Byte Bit

Number Symbol Default Description

DATA0 (0x28)

0 Not used 0 A read command returns 0

Read Area

1 OFFSETFINISHED 0 Offset compensation

finished

2 AGCFINISHED 0 AGC loop compensation

finished

3 CORDICOVF 0 Overflow of the CORDIC

4 AGCALARML 0 AGC loop saturation

because of B field too strong

5 AGCALARMH 0 AGC loop saturation

because of B field too weak

6OTP_RES0

0=1K resistance selected for

OTP download;

1=10K resistance selected

for OTP download

7 PARITY_ERR 0 UART parity error flag

DATA1 (0x29)

0CORDICOUT<0>0

CORDIC Output

1CORDICOUT<1>0

2CORDICOUT<2>0

3CORDICOUT<3>0

4CORDICOUT<4>0

5CORDICOUT<5>0

6CORDICOUT<6>0

7CORDICOUT<7>0

ams Datasheet Page 33

[v1-04] 2015-Dec-07 Document Feedback

AS5161 − Application Information

DATA2 (0x2A)

0CORDICOUT<8>0

CORDIC Output

Read Area

1CORDICOUT<9>0

2CORDICOUT<10>0

3CORDICOUT<11>0

4CORDICOUT<12>0

5CORDICOUT<13>0

6Not used0

A read command returns all

data bits at 0

7Not used0

DATA3 (0x2B)

0DSPOUT<0>0

DSP Output

1DSPOUT<1>0

2DSPOUT<2>0

3DSPOUT<3>0

4DSPOUT<4>0

5DSPOUT<5>0

6DSPOUT<6>0

7DSPOUT<7>0

DATA4 (0x2C)

0DSPOUT<8>0

1DSPOUT<9>0

2DSPOUT<10>0

3DSPOUT<11>0

4Not used0

A read command returns all

data bits at 0

5Not used0

6Not used0

7Not used0

Data Byte Bit

Number Symbol Default Description

Page 34 ams Datasheet

Document Feedback [v1-04] 2015-Dec-07

AS5161 − Application Information

DATA5 (0x2D)

0AGCVALUE<0>0

AGC Value

Read Area

1AGCVALUE<1>0

2AGCVALUE<2>0

3AGCVALUE<3>0

4AGCVALUE<4>0

5AGCVALUE<5>0

6AGCVALUE<6>0

7AGCVALUE<7>0

DATA6 (0x2E)

0MAG<0>0

Magnitude of magnetic field

1MAG<1>0

2MAG<2>0

3MAG<3>0

4MAG<4>0

5MAG<5>0

6MAG<6>0

7MAG<7>0

DATA7 (0x2F)

0Not used0

A read command returns all

data bits at 0

1Not used0

2Not used0

3Not used0

4Not used0

5Not used0

6Not used0

7Not used0

Data Byte Bit

Number Symbol Default Description

ams Datasheet Page 35

[v1-04] 2015-Dec-07 Document Feedback

AS5161 − Application Information

Special Registers

Figure 36:

Special Registers

Data Byte Bit

Number Symbol Default Description

DATA0 (0x41)

0 AS5161KEY<0> 0

AS5161 KEY<15:0>=0101

0001 0110 0010

A write command with data

different from AS5161 KEY is

not executed

A read command returns all

data bits at 0

Fuse Register

1 AS5161KEY<1> 0

2 AS5161KEY<2> 0

3 AS5161KEY<3> 0

4 AS5161KEY<4> 0

5 AS5161KEY<5> 0

6 AS5161KEY<6> 0

7 AS5161KEY<7> 0

DATA1 (0x42)

0 AS5161KEY<8> 0

1 AS5161KEY<9> 0

2 AS5161KEY<10> 0

3 AS5161KEY<11> 0

4 AS5161KEY<12> 0

5 AS5161KEY<13> 0

6 AS5161KEY<14> 0

7 AS5161KEY<15> 0

Page 36 ams Datasheet

Document Feedback [v1-04] 2015-Dec-07

AS5161 − Application Information

DATA0 (0x60)

0 AS5161KEY<0> 0

AS5161 KEY<15:0>=0101

0001 0110 0010

A write command with data

different from AS5161 KEY is

not executed

A read command returns all

data bits at 0

Pass2Func Register

1 AS5161KEY<1> 0

2 AS5161KEY<2> 0

3 AS5161KEY<3> 0

4 AS5161KEY<4> 0

5 AS5161KEY<5> 0

6 AS5161KEY<6> 0

7 AS5161KEY<7> 0

DATA1 (0x61)

0 AS5161KEY<8> 0

1 AS5161KEY<9> 0

2 AS5161KEY<10> 0

3 AS5161KEY<11> 0

4 AS5161KEY<12> 0

5 AS5161KEY<13> 0

6 AS5161KEY<14> 0

7 AS5161KEY<15> 0

Data Byte Bit

Number Symbol Default Description

ams Datasheet Page 37

[v1-04] 2015-Dec-07 Document Feedback

AS5161 − Application Information

Programming Procedure

•Pull-Up on out pin

•VDD=5V

•Wait 10ms (after the startup time device enters

communication mode)

•Write command: Trimming bits are written in the OTP RAM

•Read command: All the trimming bits are read back to

check the correctness of the writing procedure.

•Write AS5161KEY in the Fuse register: The OTP RAM

content is permanently transferred into the Poly Fuse

cells.

•Wait 10 ms (fuse time)

•Write command, R1K_10K<1:0>=(11)b: Poly Fuse cells are

downloaded into the RAM memory using a 10K resistance

as reference.

•Wait 5 ms (download time)

•Read R1K_10K register, the expected value is 00b

•Write command, R1K_10K<1:0>=(11)b

•Read R1K_10K register, the expected value is (11)b.

NB: Step11 and Step12 have to be consecutive.

•Read command: all the fused bits downloaded with 10K

resistance are read back.

•Write command, R1K_10K=<1:0>=(10)b: Poly Fuse cells

are downloaded into the RAM memory using a 1K

resistance as reference.

•Wait 5 ms (download time)

•Read R1K_10K register, the expected value is (00)b

•Write command register, R1K_10K<1:0>=(10)b

•Read R1K_10K register, the expected value is (10)b

NB: Step18 and Step19 have to be consecutive.

•Read command: All the fused bits downloaded with 1K

resistance are read back.

•Check that read commands at Steps 5, 13 and 19 are

matching

•Write AS5161KEY in the Pass2Func register: Device enters

normal mode.

Page 38 ams Datasheet

Document Feedback [v1-04] 2015-Dec-07

AS5161 − Application Information

Mechanical Data

The internal Hall elements are placed in the center of the

package on a circle with a radius of 1.25mm.

Figure 37:

Hall Element Positions

Note(s) and/or Footnote(s):

1. All dimensions in mm.

2. Die thickness 356μm nom.

3. Adhesive thickness 2 0 ± 10μm.

4. Lead frame downest 200 ± 25μm.

5. Lead frame thickness 200 ± 8μm.

ams Datasheet Page 39

[v1-04] 2015-Dec-07 Document Feedback

AS5161 − Package Drawings & Markings

The device is available in a SOIC 8 - Lead 150 MIL Package.

Figure 38:

Package Drawings and Dimensions

Note(s) and/or Footnote(s):

1. Dimensions and tolerancing confirm to ASME Y14.5M-1994.

2. All dimensions are in miilimeters. Angles are in degrees.

Figure 39:

Package Marking: @YYWWMZZ

@YY WW MZZ

Sublot identifier Year Week Assembly plant identifier Assembly traceability code

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 -

Symbol Min Typ Max

R0.07- -

R1 0.07 - -

h0.25-0.50

Q0º- 8º

Θ15º - 15º

Θ20º - -

aaa - 0.10 -

bbb - 0.20 -

ccc - 0.10 -

ddd - 0.25 -

eee - 0.10 -

fff - 0.15 -

N-8-

Green

RoHS

Page 40 ams Datasheet

Document Feedback [v1-04] 2015-Dec-07

AS5161 − Ordering & Contact Information

The devices are available as the standard products shown in

Figure 40.

Figure 40:

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

Tobelbaderstrasse 30

8141 Unterpremstaetten

Austria, Europe

Tel: +43 (0) 3136 500 0

Website: www.ams.com

Ordering Code Description Package Delivery Form Delivery Quantity

AS5161-HSOP 12-Bit Programmable

Angle Position Sensor

with PWM output

SOIC - 8 Tape & Reel

2500 pcs/reel

AS5161-HSOM 500 pcs/reel

Ordering & Contact Information

ams Datasheet Page 41

[v1-04] 2015-Dec-07 Document Feedback

AS5161 − 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 42 ams Datasheet

Document Feedback [v1-04] 2015-Dec-07

AS5161 − Copyright s & Disclaimer

Unterpremstaetten, 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 43

[v1-04] 2015-Dec-07 Document Feedback

AS5161 − 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 44 ams Datasheet

Document Feedback [v1-04] 2015-Dec-07

AS5161 − Revision Information

Note(s) and/or Footnote(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 1.1 (2013-Oct-31) to current revision 1-04 (2015-Dec-07) Page

1.1 (2013-Oct-31) to 1-02 (2015-Aug-07)

Content was updated to the latest ams design

Noise Suppressor section was removed

Updated Key Benefits & Features 2

Updated Figure 34 25

Added Mechanical Data section 38

Updated Package Drawings & Markings section 39

Updated Figure 42 40

1-02 (2015-Aug-07) to 1-03 (2015-Nov-19)

Removed Linearization of the Output section

Updated text under Detailed Description 9

Updated Figure 13 11

Updated Figure 18 15

1-03 (2015-Nov-19) to 1-04 (2015-Dec-07)

Updated Figure 2 2

Updated Figure 33 [DATA11 (0x0B), DATA12 (0x0C)] 25

Updated Mechanical Data section 38

Revision Information

ams Datasheet  Page 45
[v1-04] 2015-Dec-07 Document Feedback
AS5161 − Content Guide
General Description
Key Benefits & Features
Applications
Block Diagram
Pin Assignment
5Absolute Maximum Ratings
Electrical Characteristics
Operating Conditions
Magnetic Input Specification
Electrical System Specifications
Timing Characteristics
Power Management - Supply Monitor
Detailed Description
Operation
VDD Voltage Monitor
PWM Output
Programming Parameters
Application Specific Angular Range Programming
Application Specific Programming of the Break Point
Multiple Slope Output
Resolution of Parameters
PWM Output Driver Parameters
Hysteresis Function
Application Information
Recommended Application Schematic
Programming the AS5161
UART Interface for Programming
Frame Organization
WRITE (Command Description)
READ (Command Description)
Baud-Rate Automatic Detection
Baud-Rate Manual Setting (Optional)
OTP Programming Data
READ / WRITE Register Map
READ Only Register Map
Special Registers
Programming Procedure
Mechanical Data
Package Drawings & Markings
Ordering & Contact Information
RoHS Compliant & ams Green Statement
Copyrights & Disclaimer
Document Status
Revision Information
Content Guide