Dual die motion sensing IC for
Safety Critical Applications
AS5263
Fail-Safe Automotive Rotary Encoder
12-bit, Single wire interface per device
Programmable Output
5V
clamping
high
T2y
Output Voltage
Set point high
T1y
clamping
low
0V
Set point low
0°
T1
Angle Range
T2
27V overvoltage protection
-18V reverse polarity
Intelligent short circuit protection
-40°C to +150°C temperature range
360°
Meets toughest
automotive requirements
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S
www.austriamicrosystems.com
products@austriamicrosystems.com
© 11/2009 by austriamicrosystems AG
Subject to change without notice
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Die 2
Spacer / Isolation
Headquarters
austriamicrosystems AG
Tobelbader Strasse 30, 8141 Unterpremstaetten, Austria
Phone +43 3136 500-0 · Fax +43 3136 525-01
Die 1
General Description
Key Features
Benefits
The AS5263 is a contactless, dual die 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. The AS5263 includes two AS5163 in one
QFN package and is because of that a fully redundant
encoder system.
It is a system-on-chip, combining integrated Hall elements, analog front end, digital signal processing
with best in class automotive protection features.
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 14-bit
programmable 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 as a 12-bit PWM signal or a 12-bit ratiometric
analog output.
The AS5263 operates at a supply voltage of 5 V and
the supply and output pins are protected against overvoltage up to +27 V. In addition, the supply pins
are protected against reverse polarity up to – 18 V.
Furthermore, a continuous short circuit monitoring is
included to protect the IC. Programmability over the
two output pins reduces the number of pins on the
application connector.
- 360° contactless high resolution angular
position encoding
- User programmable starting and end point of
the application region
- User programmable clamping levels and
programming of the transition point
- 12-bit PWM or powerful analog output
· fully short circuit protected
· high driving capability for resistive and
capacitive loads
- Continuous short circuit monitoring
- 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
- Wide temperature range: -40°C to +150°C
- Small Pb-free package: TSSOP-14
- Thin QFN 32 (7x7) package
- Fully AEC-Q100 grade 0 qualified
-
VDD5
VDD
Fail-safe complete on system
Best protections for automotive applications
Insensitive to external magnetic stray fields
Flexible 1-wire interface per device
Unique fully differential patented solution
Easy to program
Ideal for applications in harsh environments
due to contactless position sensing
- Robust system, tolerant to magnet misalignment,
airgap variations, temperature variations
- No calibration required because of inherent accuracy
Applications
Safety critical applications in Automotive and Industry
- Gas pedal position sensing
- Steering position sensing
- Throttle and similar applications
- Medical robots
- etc.
VDD3
AS5263
High voltage/
Reverse polarity
protection
OTP
Register
Single pin
Interface
Zero Position
Hall Array
Sin
Frontend
Amplifier
Cos
ADC
OUT
CORDIC
14bit
12bit
PWM
Angle
Output
DSP
12
12bit
DAC
M
U
X
OUT
Driver
Note: Block diagram shows only one die!
GND
www.austriamicrosystems.com/AS5263
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