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ams OSRAM AS5132 High-Speed Magnetic Rotary Encoder IC

ams OSRAM AS5132 High-Speed Magnetic Rotary Encoder IC 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 an 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, and the magnet does not need to be mechanically aligned.

Features

  • 360° contactless angular position sensing
  • Two digital absolute outputs (8.5-bit): Serial interface and PWM output
  • Incremental output with adjustable number of pulses
  • BLDC Output UVW, selectable for 1,2,3,4,5,6 pole pairs
  • Supports external PWM clock mode
  • Static and dynamic pre-commutation feature
  • User-programmable zero position and sensitivity
  • High speed: up to 72,900rpm
  • Direct measurement of magnetic field strength allows exact determination of vertical magnet distance
  • Incremental outputs ABI quadrature: 90ppr, step direction: 180ppr, fixed pulse width 360ppr
  • 9-bit multi-turn counter
  • Wide magnetic field input range: 20-80mT (typical)
  • -40°C to +150°C wide temperature range: 
  • Thin small Pb-free package: SSOP-20

Applications

  • Contactless rotary position sensing
  • Rotary switches (human machine interface)
  • AC/DC motor position control
  • Brushless DC motor position control

Block Diagram

Block Diagram - ams OSRAM AS5132 High-Speed Magnetic Rotary Encoder IC
Published: 2012-11-28 | Updated: 2022-03-11