AS5040 8-bit Programmable Magnetic Rotary Encoder
Revision 1, April 2012
www.austriamicrosystems.com
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1
General Description
The AS5132 is a contactless magnetic rotary encoder for accurate
angular measurement over a full turn of 360 degrees. It is a
systemon-
chip, combining integrated Hall elements, analog frontend and
digital signal processing in a single device.
To measure the angle, only a simple two-pole magnet, rotating over
the center of the chip is required.
The absolute angle measurement provides instant indication of the
magnet’s angular position with a resolution of 8.5 bit = 360 positions
per revolution. This digital data is available as serial output over the
interface and as a pulse width modulated (PWM) signal.
An additional U,V,W output can be used for a block commutation for
a brushless DC motor. An incremental signal is available as an
option.
In addition to the angle information, the strength of the magnetic
field
is also available as a 5-bit code.
A software programmable (OTP) zero position simplifies assembly
as the zero position. The magnet does not need to be mechanically
aligned.
To optimize the torque characteristic at a certain speed
theAS5132 has the option to use a static or dynamic pre-
commutation
2
The AS5132 Adapter board
2.1
Board description
The AS5132 adapter board is a simple circuit allowing test and evaluation of the AS5132 rotary encoder quickly without building a
test fixture or PCB. The PCB requires 5V power supply and GND connection. To program the device or read out the absolute
position of the magnet via SSI a software is mandatory. COM/INC PIN is needed to select UVW Output or ABIndex. To use the
static or dynamic pre-commutation a programming on the device is mandatory.
Figure 1: AS5132 Adapterboard
AS5132-AB-v1.0
Adapterboard
OPERATION MANUAL
AS5132
Programmable Magnetic Rotary Encoder
COM/INC PIN to
select UVW or ABI
4 x 2.6mm
mounting holes
AS5132
encoder
UVW or ABIndex
connection
