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Datasheet
AS5263
12-Bit Redundant Automotive Angle Position Sensor
1 General Description
The AS5263 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. The AS5263 includes two AS5163 in one QFN package.
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 0.087º = 4096 positions per revolution. The start and end point of the sub segment will be programmed with a resolution of 14-bit (0.022º= 16384 steps 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 PWM signal or 12-bit ratiometric analog output.
An internal voltage regulator with over voltage protection and reverse polarity protection allows the AS5263 to operate in automotive application up to a voltage to 27V. Programmability over the output pin reduces the number of pins on the application connector. The AS5263 is the ideal solution for safety critical applications due to the redundant approach.
Figure 1. AS5263 Block Diagram
2 Key Features
360º contactless high resolution angular position encoding
User programmable start and end point of the application region
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: -40ºC to +150ºC
Small Pb-free package: 32-pin QFN (7x7mm)
Broken GND and VDD detection over a wide range of different load conditions
Simplified programming due to provided programming hardware and software
Failure detection mode for magnet placement monitoring and loss of power supply
Indication of high voltage condition
3 Applications
The AS5263 is ideal for automotive applications like transmission gearbox position sensor, headlight position control, torque sensing, valve position sensing, pedal position sensing, throttle position sensing, and non-contact potentiometers.
VDD_T VDD_B
VDD5_B VDD3_B VDD5_T VDD3_T
High voltage/ Reverse polarity
protection
OTP Single pin Register Interface
AS5263
Hall Array
Frontend Amplifier
Sin Cos
CORDIC 14-bit
Angle
ADC
Zero Position
Output DSP
12
Full Turn Output
12-bit M PWM U
12-bit X
DAC Programmable
Angle
OUT Driver
GND_T GND_B
Top Silicon Die Bottom Silicon Die
_T …… Pin of the Top Device _B …… Pin of the Bottom Device
OUT_T OUT_B
KDOWN_T KDOWN_B
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Technical coantmesntAsGtill valid
AS5263
Datasheet - Contents
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 ...................................................................................................................................................... 5 6 Electrical Characteristics........................................................................................................................................................... 6
6.1 Operating Conditions............................................................................................................................................................................ 6 6.2 Magnetic Input Specification................................................................................................................................................................. 6 6.3 Electrical System Specifications........................................................................................................................................................... 7 6.4 Timin.