AS5030
8-Bit Programmable High Speed Magnetic Rotary Encoder
1 General Description
The AS5030 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.
2 Key Features
360° contactless angular position encoding
Two digital 8-bit absolute outputs:
- Serial interface
- Pulse width modulated (PWM) output
User programmable zero position
To measure the angle, only a simple two-pole magnet, rotating over
the center of the chip is required.
Direct measurement of magnetic field strength allows exact
The absolute angle measurement provides instant indication of the
magnet’s angular position with a resolution of 8 bit = 256 positions
per revolution. This digital data is available as a serial bit stream and
as a PWM signal.
determination of vertical magnet distance
Serial read-out of multiple interconnected AS5030 devices
using daisy chain mode
In addition to the angle information, the strength of the magnetic field
is also available as a 6-bit code.
Wide magnetic field input range: 20 ~ 80mT
Wide temperature range: -40°C to +125°C
Small Pb-free package: TSSOP 16
Data transmission can be configured for 1-wire (PWM), 2-wires
(CLK, DIO) or 3-wires (CLK, DIO, CS).
A software programmable (OTP) zero position simplifies assembly
as the zero position of the magnet does not need to be mechanically
aligned.
3 Applications
The AS5030 is suitable for Contactless rotary position sensing,
Rotary switches (human machine interface), AC/DC motor position
control, Robotics and Encoder for battery operated equipment.
A Power Down Mode together with fast startup- and measurement
cycles allows for very low average power consumption and makes
the AS5030 also suitable for battery operated equipment.
Figure 1. AS5030 Block Diagram
Sin / Sinn / Cos / Cosn
PWM
Decoder
AS5030
PWM
Angle
DX
Sin
Tracking
ADC &
Angle
Zero
Position
Absolute
Serial
Interface
(SSI )
DIO
Cos
Decoder
CS
CLK
C2
Hall Array
&
Front-end
Amplifier
Mag
A G C
AGC
MagRngn
PROG
Power Management
OTP
www.ams.com/AS5030
Revision 2.4
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