AS5306 Linear Encoder IC

Description

The AS5306 is a single-chip IC with integrated Hall elements for measuring linear or rotary motion using multi-pole magnetic strips or rings. This allows the usage of the AS5306 in applications where the Sensor IC cannot be mounted at the end of a rotating device (e.g. at hollow shafts). Instead, the AS5306 is mounted off-axis underneath a multi-pole magnetized ring or strip and provides a quadrature incremental output with 40 pulses per pole period at speeds of up to 12 meters/sec. A single index pulse is generated once for every pole pair at the index output.

The magnet pole pair length is 2.4mm (1.2mm north pole / 1.2mm south pole).

The AS5306A device provides push pull configurations for the A, B and index outputs. The AS5306B device provides open drain configurations for the A, B and index outputs.

The AS5306 is available in a small 20-pin TSSOP package and specified for an operating ambient temperature of -40° to 125°C.

Ordering Guideline

Key Features

• High speed up to 12m/s (AS5306)
• Magnetic pole pair length: 2.4mm
• Resolution: 15µm
• 40 pulses / 160 positions per magnetic period
• 1 index pulse per pole pair
• Linear movement measurement using multi-pole magnetic strips
• Circular off-axis movement measurement using multi-pole magnetic rings
• 4.5V to 5.5V operating voltage
• Magnetic field strength indicator, magnetic field alarm for end-of-strip or missing magnet

Applications

The AS5306 is ideal for high speed linear motion and off axis rotation measurement in applications such as

• electrical motors
• X-Y-stages
• rotation knobs
• industrial drives

Block Diagram