AS5030 Rotary Encoder IC

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 2-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.

Key Features

• 360° contactless angular position encoding
• 2 digital 8-bit absolute outputs:
  • serial interface and
  • pulse width modulated (PWM) output
• User programmable zero position
• High speed: up to 30,000rpm
• 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

Applications

• Contactless rotary position sensing
• Rotary switches (human machine interface)
• AC/DC motor position control
• Robotics
• Encoder for battery operated equipment

Block Diagram

Block Diagram

Block Diagram