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AEAT-9000 Absolute Encoder

Photonics.com
Sep 2011
Broadcom Ltd.
 
SAN JOSE, Calif., Sept. 8, 2011 — Avago Technologies has unveiled a high-resolution absolute optical encoder for high-performance servo and motor feedback applications. The AEAT-9000 ultraprecision absolute encoder provides high accuracy for smooth motor drive performance. The device is available in a modular package that enables it to be mounted in space-constrained locations with various mounting requirements, simplifying design and reducing assembly time.

The single-turn encoder offers up to 17-bit resolution for precise angle measurement over a full rotation of 360°. The modular design consists of a read head and a code disk. Unlike conventional encoders, it can be directly integrated on the motor, providing system cost savings and better overall performance. Leveraging differential internal and external signal paths, the absolute encoder delivers good noise cancellation for robust system noise immunity in industrial environments, making it suitable for servomotors, industrial and maritime valve control applications, high-precision test and measurement equipment, and factory automation equipment.

The encoder delivers high-accuracy positioning with two-channel true differential sine/cosine outputs and A/B incremental analog outputs, all with 2048 counts per rotation. The multiple output formats offer flexibility to support both absolute and incremental position information. Photodetectors are incorporated for electrical alignment on the radial and tilt. On-chip interpolation and code correction compensate for mounting tolerance.

Features include selectable direction for up/down position counters, a built-in monitor track for monitoring LED light levels, error output for LED degradation, and an operating temperature of −40 to 115 °C.


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