Preliminary Data Sheet
AS5165
A U TO M O T I V E A n g l e P o s i t i o n S e n s o r w i t h S E N T J 2 7 1 6
1 General Description
2 Key Features
The AS5165 is a contactless magnetic angle position sensor for
accurate angular measurement over a full turn of 360º. 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.
360º contactless high resolution angular position encoding
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.
Small Pb-free package: TSSOP 14
User programmable start and end point of the application region
User programmable clamping levels and programming of the
transition point
Wide temperature range: - 40ºC to + 150ºC
3 Applications
The absolute angle measurement provides instant indication of the
magnet’s angular position with a programmable resolution of 0.022º
= 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 the SENT J2716
interface.
The AS5165 is suitable for Automotive applications like throttle and
valve position sensing and several power train applications.
The AS5165 operates at a supply voltage of 5V and the supply and
output pins are protected against overvoltage up to +27V. In addition
the supply pins are protected against reverse polarity up to -18V.
Figure 1. AS5165 Block Diagram
VDD5 VDD3
VDD
High voltage /
Reverse polarity
protection
Hall Array
Frontend
Amplifier
AS5165
OTP
Register
Single pin
Interface
Sin
Cos
CORDIC
14bit
Angle
Output
DSP
12
SENT
J2716
OUT
Driver
OUT
ADC
GND
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AS5165
Preliminary Data Sheet - C o n t e n t s
Contents
1 General Description ..................................................................................................................................................................
1
2 Key Features.............................................................................................................................................................................
1
3 Applications...............................................................................................................................................................................
1
4 Pin Assignments .......................................................................................................................................................................
3
4.1 Pin Descriptions....................................................................................................................................................................................
3
5 Absolute Maximum Ratings ......................................................................................................................................................
4
6 Electrical Characteristics...........................................................................................................................................................
5
6.1 Operating Conditions............................................................................................................................................................................
5
6.2 Magnetic Input Specification.................................................................................................................................................................
5
6.3 Electrical System Specifications...........................................................................................................................................................
6
6.4 Timing Characteristics ..........................................................................................................................................................................
7
7 Detailed Description..................................................................................................................................................................
8
7.1 Operation..............................................................................................................................................................................................
9
7.1.1 VDD Voltage Monitor ................................................................................................................................................................... 9
7.2
Output Characteristic ........................................................................................................................................................................
7.2.1
7.2.2
7.2.3
7.2.4
7.2.5
7.2.6
Programming Parameters..........................................................................................................................................................
Application Specific Angular Range Programming ....................................................................................................................
Application Specific Programming of the Break Point ...............................................................................................................
Full Scale Mode .........................................................................................................................................................................
Resolution of the Parameters ....................................................................................................................................................
SENT Output Driver Parameters ...............................................................................................................................................
8 Application Information ...........................................................................................................................................................
8.1
9
10
10
11
11
12
12
13
Programming the AS5165...............................................................................................................................................................
13
8.1.1 Hardware Setup......................................................................................................................................................................... 13
8.1.2 Protocol Timing and Commands of Single Pin Interface ........................................................................................................... 14
8.2 OTP Programming Data .....................................................................................................................................................................
23
8.2.1 Read / Write User Data.............................................................................................................................................................. 27
8.2.2 Programming Procedure............................................................................................................................................................ 27
8.3
Choosing the Proper Magnet ..........................................................................................................................................................
28
8.3.1 Physical Placement of the Magnet ............................................................................................................................................ 29
8.3.2 Magnet Placement..................................................................................................................................................................... 29
9 Package Drawings and Markings ...........................................................................................................................................
30
10 Ordering Information.............................................................................................................................................................
32
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AS5165
Preliminary Data Sheet - P i n A s s i g n m e n t s
4 Pin Assignments
Figure 2. TSSOP-14 Pin Configuration
1
14
OUT
VDD5
2
13
NC
NC
3
12
GNDP
VDD3
4
11
NC
GNDA
5
10
NC
NC
6
9
NC
NC
7
8
GNDD
AS5165
VDD
4.1 Pin Descriptions
Table 1. TSSOP-14 Pin Descriptions
Pin Name
Pin Number
Pin Type
VDD
1
Supply pin
Positive supply pin. This pin is overvoltage protected.
VDD5
2
Supply pin
4.5V- Regulator output, internally regulated from VDD. This
pin needs an external ceramic capacitor of 2.2 µF
NC
3
Multi purpose pin
VDD3
4
Supply pin
3.45V- Regulator output, internally regulated from VDD5. This
pin needs an external ceramic capacitor of 2.2 µF
GNDA
5
Supply pin
Analog ground pin. Connected to ground in the application.
NC
6
Multi purpose pin
Test pins for fabrication. Connected to ground in the
application.
NC
7
Multi purpose pin
Test pins for fabrication. Open in the application.
GNDD
8
Supply pin
NC
9
Multi purpose pin
Test pins for fabrication. Connected to ground in the
application.
NC
10
Multi purpose pin
Test pins for fabrication. Connected to ground in the
application.
NC
11
NC
GNDP
12
Supply pin
NC
13
Multi purpose pin
Test pins for fabrication. Connected to ground in the
application.
OUT
14
Multi purpose pin
SENT output pin.
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Description
Test pins for fabrication. Connected to ground in the
application.
Digital ground pin. Connected to ground in the application.
Unconnected (not bonded)
Analog ground pin. Connected to ground in the application.
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Preliminary Data Sheet - A b s o l u t e M a x i m u m R a t i n g s
5 Absolute Maximum Ratings
Stresses beyond those listed in Table 2 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 on page 5 is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
Table 2. Absolute Maximum Ratings
Symbol
Parameter
Min
Max
Units
Comments
VDD
DC supply voltage at pin VDD
Overvoltage
-18
27
V
No operation
VOUT
Output voltage OUT
-0.3
27
V
permanent
VDD3
DC supply voltage at pin VDD3
-0.3
5.5
V
VDD5
DC supply voltage at pin VDD5
-0.3
7
V
ISCR
Input current (latchup immunity)
-100
100
mA
Norm: JEDEC 78
±4
kV
Norm: MIL 883 E method 3015
VDD, GND, OUT and KDOWN Pin.
All other pins ±2 kV
150
ºC
Min -67ºF; Max +257ºF
260
ºC
t=20 to 40s,
The reflow peak soldering temperature (body
temperature) specified is in accordance with
IPC/JEDEC J-STD-020C “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).
85
%
ESD
Electrostatic discharge
TStrg
Storage temperature
TBODY
Body temperature (Lead-free package)
H
Humidity non-condensing
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Preliminary Data Sheet - E l e c t r i c a l C h a r a c t e r i s t i c s
6 Electrical Characteristics
6.1 Operating Conditions
Table 3. Operating Conditions
Symbol
Parameter
Conditions
Min
TAMB
Ambient temperature
-40ºF…+302ºF
-40
ISUPP
Supply current
VDD
Supply voltage at pin VDD
VDD3
Voltage regulator output voltage at pin VDD3
VDD5
Voltage regulator output voltage at pin VDD5
5V Operation
Typ
Max
Units
+150
ºC
15
mA
4.5
5.0
5.5
3.3
3.45
3.6
V
Max
Units
4.5
6.2 Magnetic Input Specification
TAMB = -40 to +150ºC, VDD5 = 4.5-5.5V (5V operation) unless otherwise noted.
Two-pole cylindrical diametrically magnetized source:
Table 4. Magnetic Input Specification
Symbol
Parameter
Conditions
dmag
Diameter
tmag
Thickness
Recommended magnet: Ø 6mm x 2.5mm
for cylindrical magnets
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 1.1mm
Boff
Magnetic offset
Min
Typ
6
mm
2.5
mm
70
mT
Constant magnetic stray field
±10
mT
Field non-linearity
Including offset gradient
5
%
Disp
Displacement radius
Offset between defined device center and
magnet axis (see Figure 25). Dependant on
the selected magnet.
0.25
1
mm
Ecc
Eccentricity
Eccentricity of magnet center to rotational
axis
100
Recommended magnet material and
temperature drift
NdFeB (Neodymium Iron Boron)
-0.12
SmCo (Samarium Cobalt)
-0.035
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Preliminary Data Sheet - E l e c t r i c a l C h a r a c t e r i s t i c s
6.3 Electrical System Specifications
TAMB = -40 to +150ºC, VDD = 4.5-5.5V (5V operation) unless otherwise noted.
Table 5. Electrical System Specifications
Symbol
Parameter
RES
Resolution SENT Output
Max
Units
12
bit
Integral non-linearity (optimum) 360
degree full turn
Maximum error with respect to the best line
fit. Centered magnet without calibration,
TAMB =25ºC. This is specified over 360
degrees. A sub range may improve the nonlinearity.
±0.5
deg
Integral non-linearity (optimum) 360
degree full turn
Maximum error with respect to the best line
fit. Centered magnet without calibration,
TAMB = -40 to +150ºC. This is specified over
360 degrees. A sub range may improve the
non-linearity.
±0.9
deg
INL
Integral non-linearity 360 degree full
turn
Best line fit = (Errmax – Errmin) / 2
Over displacement tolerance with 6mm
diameter magnet, without calibration,
TAMB = -40 to +150ºC. This is specified over
360 degrees. A sub range may improve the
non-linearity
±1.4
deg
TN
Transition noise
1 sigma
VON
Power-on reset thresholds
On voltage; 300mV typical hysteresis
INLopt
INLtemp
VOFF
Power-on reset thresholds
Off voltage; 300mV typical hysteresis
tPwrUp
Power-up time
tdelay
System propagation delay
absolute output: delay of ADC, DSP
and absolute interface
Conditions
Min
Typ
Deg
RMS
0.06
1.37
2.2
2.9
1.08
1.9
2.6
DC supply voltage 3.3V (VDD3)
Fast mode, times 2 in slow mode
V
10
ms
100
µs
Note: The INL performance is specified over the full turn of 360 degrees. An operation in an angle segment increases the accuracy. A two
point linearization is recommended to achieve the best INL performance for the chosen angle segment.
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Preliminary Data Sheet - E l e c t r i c a l C h a r a c t e r i s t i c s
6.4 Timing Characteristics
Table 6. Timing Conditions
Symbol
Parameter
Conditions
Min
Typ
Max
Units
FRCOT
Internal Master Clock
±10%
4.05
4.5
4.95
MHz
TCLK
Interface Clock Time
TCLK = 1 / FRCOT
222.2
ns
T1
Bit first level
128
TCLK
T2
Bit second level
384
TCLK
TBIT
Bit Time
512
TCLK
START
Packet start
1
TBIT
PACKET
Packet
20
TBIT
IDLE
Idle Time
1
TBIT
TSW
Switch Time
10
TBIT
TDETWD
WatchDog error detection time
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Preliminary Data Sheet - D e t a i l e d D e s c r i p t i o n
7 Detailed Description
The AS5165 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 AS5165 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 (see Figure 24).
The AS5165 senses the orientation of the magnetic field and calculates a 14-bit binary code. This code is mapped to a programmable output
characteristic. A 12-bit output data and diagnostic bits are transmitted by the SENT J2716 output. This signal is available at the pin 14 (OUT).
The SENT output can be configured in many ways. 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 to the application. The transition point 0 to 360 degree can be
shifted using the break point parameter BP. This point is programmable with a high resolution of 14 bits of 360 degrees. The voltage for clamping
level low CLL and clamping level high CLH can be programmed with a resolution of 8 bits. Both levels are individually adjustable.
The AS5165 is configured by default in the single secure sensor format described in Appendix (Section A.3) of SAE-J2716 definition. It is
possible to program the device to implement the Single Sensor format described in Appendix (Section A.4) of the SAE-J2716. This selection is
programmed by the RollCnt user bit.
The output parameters can be programmed in an OTP register. No additional voltage is required to program the AS5165. 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 and the content could be frozen for ever.
The AS5165 is tolerant to magnet misalignment and unwanted external magnetic fields due to differential measurement technique and Hall
sensor conditioning circuitry.
Figure 3. Typical Arrangement of AS5165 and Magnet
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Preliminary Data Sheet - D e t a i l e d D e s c r i p t i o n
7.1 Operation
The AS5165 operates at 5V ±10%, using two internal Low-Dropout (LDO) voltage regulators. For operation, the 5V supply is connected to pin
VDD. While VDD3 and VDD5 (LDO outputs) must be buffered by 2.2µF capacitors, the VDD requires a 1µF capacitor. All capacitors (low ESR
ceramic) are supposed to be placed close to the supply pins (see Figure 4).
The VDD3 and VDD5 outputs are intended for internal use only. It must not be loaded with an external load.
Figure 4. Connections for 5V Supply Voltages
5V Operation
2.2µF
2.2µF
VDD5
VDD3
1µF
VDD
LDO
LDO
Internal
VDD4.5V
Internal
VDD3.45V
4.5 - 5.5V
GND
Note: The pins VDD3 and VDD5 must always be buffered by a capacitor. It must not be left floating, as this may cause instable internal
supply voltages which may lead to larger output jitter of the measured angle.
The supply pins are overvoltage protected up to 27V. In addition, the device has a reverse polarity protection.
7.1.1
VDD Voltage Monitor
VDD Overvoltage Management. If the voltage applied to the VDD pin exceeds the overvoltage upper threshold for longer than the detection
time, then the device enters a low power mode reducing the power consumption. When the overvoltage event has passed and the voltage
applied to the VDD pin falls below the overvoltage lower threshold for longer than the recovery time, then the device enters the normal mode.
VDD5 Undervoltage Management. When the voltage applied to the VDD5 pin falls below the undervoltage lower threshold for longer than
the VDD5_detection time, then the device stops the clock of the digital part and the output drivers are turned off to reduce the power
consumption. When the voltage applied to the VDD5 pin exceeds the VDD5 undervoltage upper threshold for longer than the VDD5_recovery
time, then the clock is restarted and the output drivers are turned on.
7.2 Output Characteristic
The pin OUT provides the SENT output format with a push/pull output driver.
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.
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Preliminary Data Sheet - D e t a i l e d D e s c r i p t i o n
7.2.1
Programming Parameters
The analog output voltage modes are programmable by OTP. Depending on the application, the analog output can be adjusted. The user can
program the following application specific parameters:
T1
Mechanical angle start point
T2
Mechanical angle end point
T1C
Output code at the T1 position
T2C
Output code at the T2 position
CLL
Clamping Level Low
CLH
Clamping Level High
BP
Break point (transition point 0 to 360 degree)
These parameters are input parameters. The parameters are converted over the provided programming software and programmer and finally
written into the AS5165 128 bit OTP memory.
7.2.2
Application Specific Angular Range Programming
The application range can be selected by programming T1 with a related T1C and T2 with a related T2C into the AS5165. The internal gain
factor is calculated automatically. The clamping levels CLL and CLH can be programmed independent from the T1 and T2 position and both
levels can be separately adjusted.
Figure 5. Programming of an Individual Application Range
90 degree
Application range
electrical range
T2
mechanical range
T1
100%
clamping range
high
CLH
CLL
0 degree
T2C
180 degree
CLH
T1C
BP
CLL
0
270 degree
clamping range
low
T1
T2
Figure 5 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 output signal
has 12-bit, hence the level T1C and T2C 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. The minimum application range is 10 degrees. In addition, the BP parameter specifies the used sector. The BP
parameter must be set outside of the application range.
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AS5165
Preliminary Data Sheet - D e t a i l e d D e s c r i p t i o n
7.2.3
Application Specific Programming of the Break Point
The break point BP can be programmed as well with a resolution of 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. The function can be used also for an on-off indication.
Figure 6. Individual Programming of the Break Point BP
Application range
90 degree
electrical range
T2
mechanical range
T1
100%
CLH
clamping range
high
CLH
0 degree
T2C
180 degree
CLL
T1C
CLL
BP
0
270 degree
7.2.4
clamping range
low
T1
T2
clamping range
low
Full Scale Mode
Without programming the parameters T1 and T2, the AS5165 is in the full scale mode.
Figure 7. Full Scale Mode
Output Code
100 %
0
360
For simplification, Figure 7 describes a linear output format. Due to the digital output, a rail to rail operation is possible. (as indicated Figure 7).
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Preliminary Data Sheet - D e t a i l e d D e s c r i p t i o n
7.2.5
Resolution of the Parameters
The programming parameters have a wide resolution up to 14 bits.
Table 7. Resolution of the Programming Parameters
Symbol
Parameter
Resolution
Note
T1
Mechanical angle start point
14 bits
000h – FFFh
T2
Mechanical angle stop point
14 bits
000h – FFFh
T1C
Output Code at mechanical start point
12 bits
000h – 3FFh
T2C
Output Code at mechanical end point
12 bits
000h – 3FFh
CLL
Clamping level low
8 bits
4080 LSBs is the maximum level
CLH
Clamping level high
8 bits
15 LSBs is the minimum level
BP
Break point
14 bits
000h – FFFh
Figure 8. Overview of the Angular Output Voltage
100
Clamping Region High
Output Code in percent
CLH
T2C
Application Region
T1C
CLL
Clamping Region Low
0
Figure 8 gives an overview of the different ranges.
7.2.6
SENT Output Driver Parameters
The output stage is configured in a push-pull output. Therefore it is possible to sink and source currents.
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Preliminary Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
8 Application Information
The benefits of AS5165 are as follows:
Unique fully differential patented solution
Insensitive to external magnetic stray fields
Best protections for automotive applications
Easy to program
Ideal for applications in harsh environments due to contactless position sensing
Robust system, tolerant to magnet misalignment, air gap variations, temperature variations
No calibration required because of inherent accuracy
8.1 Programming the AS5165
The AS5165 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, the factory settings are stored in the OTP memory.
Both regions are independently lockable by built-in lock bits.
A single OTP cell can be programmed only once. By 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 AS5165 automatically starts up in the functional operation mode. No communication of the specific protocol is
possible after this.
8.1.1
Hardware Setup
For OTP memory access, the pin OUT and the supply connection is required. Without the programmed Mem_Lock_USER OTP bit, the device
will start up in the communication mode and will remain into an IDLE operation mode. The pull up resistor RCommunication is required during
startup.
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AS5165
Preliminary Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
Figure 9. Programming Schematic of the AS5165
SENSOR PCB
VDD
VDD
1uF
AS5165
2.2uF
(low ESR)
2.2uF
(low ESR)
0.3 O
VDD5
VDD3
VDD
Programmer
RComunication
OUT
DIO
GNDA GNDD GNDP
GND
8.1.2
GND
Protocol Timing and Commands of Single Pin Interface
During the communication mode, the output level is defined by the external pull up resistor RCommunication. The output driver of the device is in tristate. The bit coding (shown in Figure 10) has been chosen in order to allow the continuous synchronization during the communication, which
can be required due to the tolerance of the internal clock frequency. Figure 10 shows how the different logic states '0' and '1' are defined. The
period of the clock TCLK is defined with 222.2 ns.
The voltage levels VH and VL are CMOS typical.
Each frame is composed by 20 bits. The 4 MSB (CMD) of the frame specifies the type of command that is passed to the AS5165. 16 data bits
contain the communication data. There will be no operation in case of the usage of a not specified CMD. The sequence is oriented in a way that
the LSB of the data is coming first followed by the command. Depending on the command the number of frames is different. The single pin
programming interface block of the AS5165 can operate in slave communication or master communication mode. In the slave communication
mode, the AS5165 receives the data organized in frames. The programming tool is the driver of the single communication line and can pull down
the level. In case of the master communication mode, the AS5165 transmits data in the frame format. The single communication line can be
pulled down by the AS5165.
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Preliminary Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
Figure 10. Bit Coding of the Single Pin Programming Interface
Bit “0“
Bit “1“
VH
VH
VL
VL
T1
T2
T1
T2
T1 = 128*TCLK
TBIT = T1 + T2 =512*TCLK
T2 = 384*TCLK
Figure 11. Protocol Definition
IDLE START
PACKET
DATA
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IDLE START
COMMAND
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Preliminary Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
Table 8. OTP Commands and Communication Interface Modes
Possible Interface
Commands
Description
AS5165
Communication
Mode
Command
CMD
Number of
Frames
UNBLOCK
Resets the interface
SLAVE
0x0
1
WRITE128
Writes 128 bits (user+ factory settings) into the device
SLAVE
0x9
(0x1)
8
READ128
Read 128 bits (user+ factory settings) from the device
SLAVE and MASTER
0xA
9
UPLOAD
Transfers the register content into the OTP memory
SLAVE
0x6
1
DOWNLOAD
Transfers the OTP content to the register content
SLAVE
0x5
1
FUSE
Command for permanent programming
SLAVE
0x4
1
PASS2FUNC
Change operation mode from communication to
operation
SLAVE
0x7
1
READ
Read related to address the user data
SLAVE and MASTER
0xB
2
WRITE
Write related to address the user data
SLAVE
0xC
1
Note: The command CMD 0x2 is reserved for AMS test purpose.
When single pin programming interface bus is in high impedance state, the logical level of the bus is held by the pull up resistor RCommunication.
Each communication begins by a condition of the bus level which is called START. This is done by forcing the bus in logical low level (done by
the programmer or AS5165 depending on the communication mode). Afterwards the bit information of the command is transmitted as shown in
Figure 12.
DATA14
MSB
LSB
DATA2
1 0 0 1
MSB
MSB
LSB
LSB
DATA3
MSB
LSB
DATA0
MSB
MSB
LSB
DATA1
LSB
LSB
START
IDLE
MSB
Figure 12. Bus Timing for the WRITE128 Command
1 0 0 0
1 0 0 0
20*TBIT
0 1 0 1
IDLE
0 0 0 P
DATA3
DATA14
MSB
LSB
DATA0
MSB
DATA1
MSB
LSB
LSB
MSB
DO NOT
CARE
MSB
LSB
DO NOT
CARE
MSB
LSB
START
IDLE
LSB
Figure 13. Bus Timing for the READ128 Command
0 0 0 P
20*TBIT
Slave Communication Mode
Master Communication Mode
TSW
In case of READ or READ128 command (Figure 13) the idle phase between the command and the answer is 10 TBIT (TSW).
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AS5165
Preliminary Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
DATA0
MSB
DATA1
MSB
LSB
LSB
ADDR1
MSB
MSB
LSB
ADDR2
MSB
LSB
START
IDLE
LSB
Figure 14. Bus Timing for the READ Commands
IDLE
0 1 0 1
0 0 0 P
20*TBIT
Slave Communication Mode
TSW
Master Communication Mode
In case of a WRITE command, the device stays in slave communication mode and will not switch to master communication mode.
When using other commands like DOWNLOAD, UPLOAD, etc. instead of READ or WRITE, it does not matter what is written in the address
fields (ADDR1, ADDR2).
Unblock. The Unblock command can be used to reset only the one-wire interface of the AS5165 in order to recover the possibility to
communicate again without the need of a POR after a stacking event due to noise on the bus line or misalignment with the AS5165 protocol.
The command is composed by a not idle phase of at least 6 TBIT followed by a packet with all 20 bits at zero (see Figure 15).
Figure 15. Unblock Sequence
VH
VL
NOT IDLE
= 6 * TBIT => 3072* TCLK
IDLE
START
PACKET[19:0] = 0x00000
IDLE
20*TBIT => 10240*TCLK
= 512*TCLK
= 512*TCLK = 512*TCLK
COMMAND FROM EXT MASTER
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Revision 0.1
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AS5165
Preliminary Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
WRITE128. Figure 16 shows the format of the frame and the command.
Figure 16. Frame Organization of the WRITE128 Command
DATA1
DATA0
MSB
LSB
LSB
CMD
MSB
LSB
1
DATA3
DATA2
MSB
LSB
LSB
DATA4
MSB
LSB
DATA6
LSB
LSB
DATA8
MSB
LSB
DATA10
MSB
LSB
DATA12
MSB
LSB
DATA14
MSB
LSB
MSB
0
0
0
MSB
0
0
LSB
1
LSB
0
0
CMD
MSB
DATA15
0
LSB
1
LSB
0
CMD
MSB
DATA13
0
MSB
LSB
1
LSB
0
CMD
MSB
DATA11
0
MSB
0
LSB
1
LSB
0
CMD
MSB
DATA9
MSB
0
LSB
1
MSB
1
CMD
MSB
DATA7
0
LSB
1
LSB
0
CMD
MSB
DATA5
MSB
MSB
0
0
0
CMD
MSB
LSB
1
MSB
0
0
0
The command contains 8 frames. With this command the AS5165 is only receiving frames. This command will transfer the data in the special
function registers (SFRs) of the device. The data is not permanent programmed using this command.
Table 9 describes the organization of the OTP data bits.
The access is performed with CMD field set to 0x9. The next 7 frames with CMD field set to 0x1. The 2 bytes of the first command will be written
at address 0 and 1 of the SFRs, the 2 bytes of the second at address 2 and 3 and so on in order to cover all the 16 bytes of the 128 SFRs.
Note: It is important to always complete the command. All 8 frames are needed. In case of a wrong command or a communication error a
power on reset must be performed.
The device will be delivered with the programmed Mem_Lock_AMS OTP bit. This bit locks the content of the factory settings. It is impossible to
overwrite this particular region. The written information will be ignored.
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AS5165
Preliminary Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
READ128. Figure 17 shows the format of the frame and the command.
Figure 17. Frame Organization of the READ128 Command
DO NOT CARE
DO NOT CARE
MSB
LSB
LSB
CMD
MSB
LSB
0
DATA1
DATA0
MSB
LSB
LSB
DATA2
LSB
DATA4
LSB
LSB
DATA8
LSB
LSB
LSB
P
0
0
P
0
0
P
MSB
DATA15
DATA14
MSB
0
CMD DUMMY
DATA12
0
LSB
0
MSB
DATA13
MSB
P
CMD DUMMY
DATA10
0
LSB
0
MSB
DATA11
MSB
0
CMD DUMMY
0
LSB
P
MSB
DATA9
MSB
0
CMD DUMMY
DATA6
0
LSB
0
MSB
DATA7
MSB
P
CMD DUMMY
0
LSB
0
MSB
DATA5
MSB
0
CMD DUMMY
0
LSB
1
MSB
DATA3
MSB
0
CMD DUMMY
0
LSB
MSB
1
LSB
0
0
P
CMD DUMMY
MSB
0
0
0
P
The command is composed by a first frame transmitted to the AS5165. The device is in slave communication mode. The device remains for the
time TSWITCH in IDLE mode before changing into the master communication mode. The AS5165 starts to send 8 frames. This command will
read the SFRs. The numbering of the data bytes correlates with the address of the related SFR.
An even parity bit is used to guarantee a correct data transmission. Each parity (P) is related to the frame data content of the 16 bit word. The
MSB of the CMD dummy (P) is reserved for the parity information.
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AS5165
Preliminary Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
DOWNLOAD. Figure 18 shows the format of the frame.
Figure 18. Frame Organization of the DOWNLOAD Command
DO NOT CARE
DO NOT CARE
MSB
LSB
LSB
CMD
MSB
LSB
1
MSB
0
1
0
The command consists of one frame received by the AS5165 (slave communication mode). The OTP cell fuse content will be downloaded into
the SFRs.
The access is performed with CMD field set to 0x5.
UPLOAD. Figure 19 shows the format of the frame.
Figure 19. Frame Organization of the UPLOAD Command
DO NOT CARE
DO NOT CARE
MSB
LSB
LSB
CMD
MSB
LSB
0
MSB
1
1
0
The command consists of one frame received by the AS5165 (slave communication mode) and transfers the data from the SFRs into the OTP
fuse cells. The OTP fuses are not permanent programmed using this command.
The access is performed with CMD field set to 0x6.
FUSE. Figure 20 shows the format of the frame.
Figure 20. Frame Organization of the FUSE Command
DO NOT CARE
LSB
DO NOT CARE
MSB
LSB
CMD
MSB
LSB
0
MSB
0
1
0
The command consists of one frame received by the AS5165 (slave communication mode) and it is giving the trigger to permanent program the
non volatile fuse elements.
The access is performed with CMD field set to 0x4.
Note: After this command, the device automatically starts to program the built-in programming procedure. It is not allowed to send other
commands during this programming time. This time is specified to 4ms after the last CMD bit.
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AS5165
Preliminary Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
PASS2FUNC. Figure 21 shows the format of the frame.
Figure 21. Frame Organization of the PASS2FUNC Command
DO NOT CARE
DO NOT CARE
MSB
LSB
LSB
CMD
MSB
LSB
1
MSB
1
1
0
The command consists of one frame received by the AS5165 (slave communication mode). This command stops the communication receiving
mode, releases the reset of the DSP of the AS5165 device and starts to work in functional mode with the values of the SFR currently written.
The access is performed with CMD field set to 0x7.
READ. Figure 22 shows the format of the frame.
Figure 22. Frame Organization of the READ Command
ADDR2
ADDR1
MSB
LSB
LSB
CMD
MSB
LSB
1
DATA2
LSB
DATA1
MSB
LSB
MSB
1
0
1
CMD DUMMY
MSB
0
0
0
P
The command is composed by a first frame sent to the AS5165. The device is in slave communication mode. The device remains for the time
TSWITCH in IDLE mode before changing into the master communication mode. The AS5165 starts to send the second frame transmitted by the
AS5165.
The access is performed with CMD field set to 0xB.
When the AS5165 has received the first frame, it sends a frame with data value of the address specified in the field of the first frame.
Table 10 shows the possible readable data information for the AS5165 device.
An even parity bit is used to guarantee a correct data transmission. The parity bit (P) is generated by the 16 data bits. The MSB of the CMD
dummy (P) is reserved for the parity information.
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AS5165
Preliminary Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
WRITE. Figure 23 shows the format of the frame.
Figure 23. Frame Organization of the WRITE Command
DATA
LSB
ADDR
MSB
LSB
CMD
MSB
LSB
0
MSB
0
1
1
The command consists of one frame received by the AS5165 (slave communication mode). The data byte will be written to the address. The
access is performed with CMD field set to 0xC.
Table 10 shows the possible write data information for the AS5165 device.
Note: It is not recommended to access OTP memory addresses using this command.
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AS5165
Preliminary Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
8.2 OTP Programming Data
Table 9. OTP Data Organization
Data Byte
DATA14 (0x0E)
DATA13 (0x0D)
DATA11 (0x0B)
Default
0
AMS_Test
FS
1
AMS_Test
FS
2
AMS_Test
FS
3
AMS_Test
FS
4
AMS_Test
FS
5
AMS_Test
FS
6
AMS_Test
FS
7
AMS_Test
FS
0
AMS_Test
FS
1
AMS_Test
FS
2
AMS_Test
FS
3
AMS_Test
FS
4
ChipID
FS
5
ChipID
FS
6
ChipID
FS
7
ChipID
FS
0
ChipID
FS
1
ChipID
FS
2
ChipID
FS
3
ChipID
FS
4
ChipID
FS
5
ChipID
FS
6
ChipID
FS
7
ChipID
FS
0
ChipID
FS
1
ChipID
FS
2
ChipID
FS
3
ChipID
FS
4
ChipID
FS
5
ChipID
FS
6
ChipID
FS
7
ChipID
FS
0
ChipID
FS
1
MemLock_AMS
1
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Revision 0.1
Description
AMS Test area
Chip ID
Customer Settings
DATA12 (0x0C)
Symbol
Factory Settings
DATA15 (0x0F)
Bit Number
Lock of the Factory Setting Area
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AS5165
Preliminary Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
Table 9. OTP Data Organization
Data Byte
DATA10 (0x0A)
DATA8 (0x08)
DATA7 (0x07)
Symbol
Default
2
KD
0
3
KD
0
4
KD
0
5
KD
0
6
KD
0
7
KD
0
0
ClampLow
0
1
ClampLow
0
2
ClampLow
0
3
ClampLow
0
4
ClampLow
0
5
ClampLow
0
6
ClampLow
0
7
DITH_DISABLE
0
0
ClampHi
0
1
ClampHi
0
2
ClampHi
0
3
ClampHi
0
4
ClampHi
0
5
ClampHi
0
6
ClampHi
0
7
DIAG_HIGH
0
0
OffsetIn
0
1
OffsetIn
0
2
OffsetIn
0
3
OffsetIn
0
4
OffsetIn
0
5
OffsetIn
0
6
OffsetIn
0
7
OffsetIn
0
0
OffsetIn
0
1
OffsetIn
0
2
OffsetIn
0
3
OffsetIn
0
4
OffsetIn
0
5
OffsetIn
0
6
OP_Mode
0
7
OP_Mode
0
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Revision 0.1
Description
Kick Down Threshold
Clamping Level Low
DAC12/DAC10 Mode
Clamping Level High
Diagnostic Mode, default =0 for Failure
Band Low
Customer Settings
DATA9 (0x09)
Bit Number
Offset
Selection of Analog, PWM or Digital
Mode
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AS5165
Preliminary Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
Table 9. OTP Data Organization
Data Byte
DATA6 (0x06)
DATA5 (0x05)
DATA3 (0x003)
DATA2 (0x02)
Symbol
Default
0
OffsetOut
0
1
OffsetOut
0
2
OffsetOut
0
3
OffsetOut
0
4
OffsetOut
0
5
OffsetOut
0
6
OffsetOut
0
7
OffsetOut
0
0
OffsetOut
0
1
OffsetOut
0
2
OffsetOut
0
3
OffsetOut
0
4
KDHYS
0
5
KDHYS
0
6
PWM Frequency
0
7
PWM Frequency
0
0
BP
0
1
BP
0
2
BP
0
3
BP
0
4
BP
0
5
BP
0
6
BP
0
7
BP
0
0
BP
0
1
BP
0
2
BP
0
3
BP
0
4
BP
0
5
BP
0
6
FAST_SLOW
0
Output Data Rate
7
ALARM_DISABLE
0
Alarm Disable
0
Gain
0
1
Gain
0
2
Gain
0
3
Gain
0
4
Gain
0
5
Gain
0
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Revision 0.1
Description
Output Offset
Kick Down Hysteresis
select the PWM frequency (4
frequencies)
Customer Settings
DATA4 (0x04)
Bit Number
Break Point
Gain
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AS5165
Preliminary Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
Table 9. OTP Data Organization
Data Byte
DATA1 (0x01)
Symbol
Default
Description
6
Gain
0
7
Gain
0
0
Gain
0
1
Gain
0
2
Gain
0
3
Gain
0
4
Gain
0
5
Gain
0
6
Invert_slope
0
Clockwise/counterclockwise rotation
7
Lock_OTPCUST
0
Customer Memory Lock
0
redundancy
0
1
redundancy
0
2
redundancy
0
3
redundancy
0
4
redundancy
0
5
redundancy
0
6
redundancy
0
7
redundancy
0
Gain
Customer Settings
DATA0 (0x00)
Bit Number
Redundancy Bits
Note: Factory settings (FS) are used for testing and programming at AMS. These settings are locked (only read access possible).
Data Content:
Redundancy (7:0): For a better programming reliability, a redundancy is implemented. In case the programming of one bit fails, then this
function can be used. With an address (7:0) one bit can be selected and programmed.
Lock_OTPCUST = 1, locks the customer area in the OTP and the device is starting up from now on in operating mode.
Invert_Slope = 1, inverts the output characteristic in analog output mode.
Gain (7:0): With this value one can adjust the steepness of the output slope.
EXT_RANGE = 1, provides a wider z-Range of the magnet by turning off the alarm function.
FAST_SLOW = 1, improves the noise performance due to internal filtering.
BP (13:0): The breakpoint can be set with resolution of 14-bit.
OffsetOut (11:0): Output characteristic parameter
OffsetIn (13:0): Output characteristic parameter
DIAG_HIGH = 1: In case of an error, the signal goes into high failure-band.
ClampHI (6:0) sets the clamping level high with respect to VDD.
DITH_DISABLE disables filter at DAC.
ClampLow (6:0) sets the clamping level low with respect to VDD.
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AS5165
Preliminary Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
8.2.1
Read / Write User Data
Table 10. Read / Write Data
Address
Address
0x10
16
0x11
17
0
0
0x12
18
OCF
COF
0x17
23
R/W User Data
Area
Region
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
CORDIC_OUT[7:0]
CORDIC_OUT[13:8]
0
0
0
0
DSP_RE R1K_10K
S
AGC_VALUE[7:0]
Read only
Read and Write
Data Content:
Data only for read:
CORDIC_OUT(13:0): 14 bit absolute angular position data.
OCF (Offset Compensation Finished): logic high indicates the finished Offset Compensation Algorithm. As soon as this bit is set, the
AS5165 has completed the startup and the data is valid.
COF (Cordic Overflow): Logic high indicates an out of range error in the CORDIC part. When this bit is set, the CORDIC_OUT(13:0) data is
invalid. The absolute output maintains the last valid angular value. This alarm may be resolved by bringing the magnet within the X-Y-Z
tolerance limits.
AGC_VALUE (7:0): magnetic field indication
Data for write and read:
DSP_RES resets the DSP part of the AS5165 the default value is 0. This is active low. The interface is not affected by this reset.
R1K_10K defines the threshold level for the OTP fuses. This bit can be changed for verification purpose. A verification of the programming
of the fuses is possible. The verification is mandatory after programming.
8.2.2
Programming Procedure
Pull-up on out pin
VDD=5V
Wait startup time, device enters communication mode
Write128 command: The trimming bits are written in the SFR memory.
Read128 command: The trimming bits are read back.
Upload command: The SFR memory is transferred into the OTP RAM.
Fuse command: The OTP RAM is written in the Poly Fuse cells.
Wait fuse time (6 ms)
Write command (R1K_10K=1): Poly Fuse cells are transferred into the RAM cells compared with 10KΩ resistor.
Download command: The OTP RAM is transferred into the SFR memory.
Read128 command: The fused bits are read back.
Write command (R1K_10K=0): Poly Fuse cells are transferred into the RAM cells compared with 1KΩ resistor.
Download command: The OTP RAM is transferred into the SFR memory.
Read128 command: The fused bits are read back.
Pass2Func command: Go back in normal mode
For further information, please refer to Application Note AN_AS5165-10.
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AS5165
Preliminary Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
8.3 Choosing the Proper Magnet
The AS5165 works with a variety of different magnets in size and shape. A typical magnet could be 6mm in diameter and ≥2.5mm in height.
Magnetic materials such as rare earth AlNiCo/SmCo5 or NdFeB are recommended. The magnetic field strength perpendicular to the die surface
has to be in the range of ±30mT…±70mT (peak).
The magnet’s field strength should be verified using a gauss-meter. The magnetic field Bv at a given distance, along a concentric circle with a
radius of 1.1mm (R1), should be in the range of ±30mT…±70mT (see Figure 24).
Figure 24. Typical Magnet (6x3mm) and Magnetic Field Distribution
typ. 6mm diameter
N
S
Magnet axis
R1
Magnet axis
Vertical field
component
N
S
R1 concentric circle;
radius 1.1mm
Vertical field
component
Bv
(30…70mT)
0
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Revision 0.1
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AS5165
Preliminary Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
8.3.1
Physical Placement of the Magnet
The best linearity can be achieved by placing the center of the magnet exactly over the defined center of the chip as shown in Figure 25.
Figure 25. Defined Chip Center and Magnet Displacement Radius
3.2 mm
3.2 mm
1
2.5 mm
Defined
center
Rd
2.5 mm
8.3.2
Area of recommended maximum
magnet misalignment
Magnet Placement
The magnet’s center axis should be aligned within a displacement radius Rd of 0.25mm (larger magnets allow more displacement) from the
defined center of the IC.
The magnet may be placed below or above the device. The distance should be chosen such that the magnetic field on the die surface is within
the specified limits (see Figure 25). The typical distance “z” between the magnet and the package surface is 0.5mm to 1.5mm, provided the use
of the recommended magnet material and dimensions (6mm x 3mm). Larger distances are possible, as long as the required magnetic field
strength stays within the defined limits.
However, a magnetic field outside the specified range may still produce usable results, but the out-of-range condition will be indicated by an
alarm forcing the output into the failure band.
Figure 26. Vertical Placement of the Magnet
N
S
Package surface
Die surface
0.2299±0.100
0.2341±0.100
0.7701±0.150
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Revision 0.1
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AS5165
Preliminary Data Sheet - P a c k a g e D r a w i n g s a n d M a r k i n g s
9 Package Drawings and Markings
The device is available in a 14-Lead Thin Shrink Small Outline Package.
Figure 27. 14-pin TSSOP Drawings and Dimensions
b
A2
A
E1
AYWWIZZ
AS5165
A1
D
E
Symbol
A
A1
A2
b
D
E
E1
e
mm
Typ
Min
0.05
0.8
0.19
4.9
6.2
4.3
Max
1.2
0.15
1.05
0.30
5.1
6.6
4.48
0.10
1
5
6.4
4.4
0.65
inch
Typ
Min
.002
0.031
0.007
0.193
0.244
0.169
.004
0.039
0.197
0.252
0.173
.0256
Max
0.047
.006
0.041
0.012
0.201
0.260
0.176
Marking: AYWWIZZ.
A
Y
WW
I
ZZ
Pb-Free Identifier
Last Digit of
Manufacturing Year
Manufacturing Week
Plant Identifier
Traceability Code
JEDEC Package Outline Standard: MO - 153
Thermal Resistance Rth(j-a): 89 K/W in still air, soldered on PCB
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AS5165
Preliminary Data Sheet - R e v i s i o n H i s t o r y
Revision History
Revision
Date
Owner
Description
0.1
May 10, 2010
apg
Initial revision
Note: Typos may not be explicitly mentioned under revision history.
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AS5165
Preliminary Data Sheet - O r d e r i n g I n f o r m a t i o n
10 Ordering Information
The devices are available as the standard products shown in Table 11.
Table 11. Ordering Information
Ordering Code
Description
Delivery Form
Package
AS5165HTSU
14-Bit Programmable Magnetic Rotary Encoder
Tubes
TSSOP-14
Note: All products are RoHS compliant and Pb-free.
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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.
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Disclaimer
Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale.
austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding
the freedom of the described devices from patent infringement. austriamicrosystems 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 austriamicrosystems AG for
current information. This product is intended for use in normal 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 austriamicrosystems AG for each application. For shipments of less than 100
parts the manufacturing flow might show deviations from the standard production flow, such as test flow or test location.
The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems 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
austriamicrosystems AG rendering of technical or other services.
Contact Information
Headquarters
austriamicrosystems AG
Tobelbaderstrasse 30
A-8141 Unterpremstaetten, Austria
Tel: +43 (0) 3136 500 0
Fax: +43 (0) 3136 525 01
For Sales Offices, Distributors and Representatives, please visit:
http://www.austriamicrosystems.com/contact
www.austriamicrosystems.com/AS5165
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