AS5162
12-Bit Magnetic Angle Position Sensor
1 General Description
The AS5162 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 ratiometric analog
output.
The AS5162 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
AS5162
and magnet
2 Key Features
360º contactless high resolution angular position sensing
User programmable start and end point of the application region
+ linearization.
User programmable clamping levels and programming of the
transition point.
Powerful analog output
- Short circuit monitor
- High driving capability for resistive and capacitive loads
Wide temperature range: - 40°C to + 150°C
Small Pb-free package: SOIC 8.
Broken GND and VDD detection over a wide range of different
load conditions.
Saw tooth mode 1,2,3,4 slopes per revolution
3 Benefits
Unique fully differential patented solution
Best protections for automotive applications
Easy to program
Additional linearization points for output characteristic
Ideal for applications in harsh environments due to contactless
position sensing
Robust system, tolerant to magnet misalignment, air gap
variations, temperature variations and external magnetic fields
High inherent accuracy
High driving capability of analog output (including diagnostics)
Broken GND and VDD detection for all external load cases
4 Applications
The AS5162 is ideal for automotive applications like throttle and
valve position sensing, gearbox position sensor, tumble flap, chassis
height level, pedal position sensing and contactless potentiometers.
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AS5162
Datasheet - C o n t e n t s
Contents
1 General Description ..................................................................................................................................................................
2 Key Features.............................................................................................................................................................................
3 Benefits.....................................................................................................................................................................................
4 Applications...............................................................................................................................................................................
5 Pin Assignments .......................................................................................................................................................................
5.1 Pin Descriptions....................................................................................................................................................................................
1
1
1
1
4
4
6 Absolute Maximum Ratings ......................................................................................................................................................
7 Electrical Characteristics...........................................................................................................................................................
7.1 Operating Conditions............................................................................................................................................................................
7.2 Magnetic Input Specification.................................................................................................................................................................
7.3 Electrical System Specifications...........................................................................................................................................................
7.4 Timing Characteristics ..........................................................................................................................................................................
7.5 Power Management - Supply Monitor ..................................................................................................................................................
5
6
6
6
7
8
8
8 Detailed Description..................................................................................................................................................................
8.1 Operation..............................................................................................................................................................................................
8.2 Analog Output.......................................................................................................................................................................................
9
9
9
8.1.1 VDD Voltage Monitor ................................................................................................................................................................... 9
8.2.1 Programming Parameters .......................................................................................................................................................... 10
8.2.2 Application Specific Angular Range Programming .................................................................................................................... 10
8.2.3 Application Specific Programming of the Break Point ............................................................................................................... 11
8.2.4 Full Scale Mode ......................................................................................................................................................................... 11
8.2.5 Multiple Slope Output ................................................................................................................................................................ 12
8.2.6 Linearization of the Output ......................................................................................................................................................... 13
8.2.7 Resolution of Parameters .......................................................................................................................................................... 13
8.2.8 Analog Output Diagnostic Mode ................................................................................................................................................ 15
8.2.9 Analog Output Driver Parameters .............................................................................................................................................. 15
8.2.10 Noise Suppressor .................................................................................................................................................................... 16
8.2.11 Hysteresis Function ................................................................................................................................................................. 16
9 Application Information ...........................................................................................................................................................
9.1 Recommended Application Schematic...............................................................................................................................................
9.2 Programming the AS5162 ..................................................................................................................................................................
9.2.1
9.2.2
9.2.3
9.2.4
9.2.5
9.2.6
16
16
18
UART Interface for Programming .............................................................................................................................................. 18
Frame Organization ................................................................................................................................................................... 18
WRITE (Command Description) ................................................................................................................................................ 20
READ (Command Description) .................................................................................................................................................. 21
Baud-rate Automatic Detection .................................................................................................................................................. 21
Baud-rate Manual Setting (optional) .......................................................................................................................................... 21
23
27
28
30
31
9.3 OTP Programming Data .....................................................................................................................................................................
9.4 READ / WRITE Register Map.............................................................................................................................................................
9.5 READ Only Register Map...................................................................................................................................................................
9.6 Special Registers................................................................................................................................................................................
9.7 Programming Procedure ....................................................................................................................................................................
10 Package Drawings and Markings .........................................................................................................................................
11 Ordering Information .............................................................................................................................................................
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35
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AS5162
Datasheet - P i n A s s i g n m e n t s
5 Pin Assignments
Figure 3. SOIC-8 Pin Configuration
VDD
TP1
VDD3V3
GND
1
8
OUT
S
TP3
TP2
2
3
4
AS5162
7
6
5
5.1 Pin Descriptions
Table 1. SOIC-8 Pin Descriptions
Pin Number
1
2
3
4
5
6
7
8
Pin Name
VDD
TP1
VDD3V3
GND
TP2
TP3
S
OUT
Pin Type
Supply pin
DIO/AIO
multi purpose pin
AIO
Supply pin
DIO/AIO
multi purpose pin
DIO/AIO
multi purpose pin
AIO
DIO/AIO
multi purpose pin
Description
Positive supply pin.
This pin is over voltage protected.
Test pin for fabrication.
Connected to ground in the application board.
Output of the internal voltage regulator
Ground pin.
Connected to ground in the application.
Test pin for fabrication.
Connected to ground in the application board.
Test pin for fabrication.
Open in the application.
Test pin for fabrication.
Connected to OUT in the application board.
Output pin analog output.
Over this pin the programming is possible.
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