AS5030_07 Datasheet, PDF (1/44 Pages) ams AG – 8-Bit Programmable High Speed Magnetic Rotary Encoder

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.
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 bit = 256 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
(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.
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
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
Direct measurement of magnetic field strength allows exact
determination of vertical magnet distance
Serial read-out of multiple interconnected AS5030 devices
using daisy chain mode
Wide magnetic field input range: 20 ~ 80mT
Wide temperature range: -40°C to +125°C
Small Pb-free package: TSSOP 16
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.
Sin / Sinn / Cos / Cosn
Sin
Cos
Hall Array
&
Front-end
Amplifier
AS5030
Tracking
ADC &
Angle
Decoder
Angle
Zero
Position
Mag
AGC
AGC
Power Management
OTP
PWM
Decoder
Absolute
Serial
Interface
( SSI )
PWM
DX
DIO
CS
CLK
C2
MagRngn
PROG
www.ams.com/AS5030
Revision 2.4
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