AS5130 Automotive Rotary Encoder IC

High Speed Magnetic Rotary Encoder with 8-bit Resolution, Multi-Turn Counter, and Diagnostic Features

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Description

The AS5130 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 magnet may be placed above or below the IC. 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. The AS5130 can be operated in pulsed mode (Vsupply=off), which reduces the average power consumption significantly. During Vsupply=off, the measured angle can be stored using an internal storage register supplied by a low power voltage line.

This mode allows for very low power consumption during polling of the rotary position of the magnet. The motion detection wakes up the system, if a motion of the magnet is detected. The multiturn counter enables the counting of the numbers of turns of the rotating magnetic field and writes it into a register. Furthermore you can set any arbitrary position as zero-position. The system is tolerant to misalignment, airgap variations, temperature variations and external magnetic fields and high reliability due to non-contact sensing.

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 80,000rpm
Failure detection mode for magnet placement
monitoring and loss of power supply
Wide temperature range: -40°C to 125°C
Multi Turn counter / Movement detection
Small Pb-free package: SSOP-16 (5,3mm x
6,2mm)
Automotive qualified to AEC-Q100, grade 1