AS5134
 
360 Step Programmable High Speed Magnetic Rotary Encoder
www.austriamicrosystems.com/AS5134
Revision 2.3
1 - 32
Datasheet
1 General Description
The AS5134 is a contactless magnetic rotary encoder for accurate
angular measurement over a full turn of 360? It is a system-on-chip,
combining integrated Hall elements, analog front-end 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 magnets angular position with a
resolution of 8.5 bit = 360 positions per revolution. This digital data is
available as a serial bit stream and as a PWM signal. In addition to
the angle information, the strength of the magnetic field is also
available as a 6-bit code.
Data transmission can be configured for 1-wire (PWM), 2-wires
(DCLK, DIO) or 3-wires (DCLK, DIO, CS).
A software programmable (OTP) zero position simplifies assembly
as the zero position of the magnet does not need to be mechanically
aligned.
A Power Down Mode together with fast startup and measurement
cycles allows a very low average power consumption.
2 Key Features
n 360?/SPAN> contactless angular position encoding
n Two digital 360 step (8.5 bit) absolute outputs: Serial interface 
and Pulse width modulated (PWM) output
n User programmable zero position and sensitivity
n High speed: up to 76875 rpm
n Direct measurement of magnetic field strength allows exact 
determination of vertical magnet distance
n Incremental Outputs ABI Quadrature: 90 ppr, step direction: 
180ppr, fixed pulse width 360ppr
n BLDC Outputs UVW, selectable for 1,2,3,4,5,6 pole pairs
n Daisy-Chain mode for cascading of multiple sensors
n 9-bit multi turn counter
n Low power mode with fast startup
n Wide magnetic field input range: 20- 80 mT
n Wide temperature range: -40?/SPAN>C to +140?/SPAN>C
n Fully automotive qualified to AEC-Q100
n Small Pb-free package: SSOP 20
3 Applications
The AS5134 is suitable for contactless rotary position sensing, rotary
switches (human machine interface), AC/DC motor position control
and Brushless DC motor position control.
Tracking ADC
& Angle
Decoder
Hall Array
&
Frontend
Amplifier
Power Management
OTP
Absolute
Serial
Interface
(SSI)
DIO
PWM
CLK
PROG
CS
PWM Decoder
AGC
C2
Mag
Zero
Pos.
AGC
Angle
Incremental
Interface
Commutation
Interface
U V W A B Index
DD 5 V
ND
DX
Multiturn
Counter
AS5134
Figure 1. AS5134 Magnetic Rotary Encoder Block Diagram
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