Description
The Broadcom® AR49 Series is an optical absolute encoder module, which offers up to 25-bit single-turn (ST) position information and 24-bit multi-turn (MT) counts, hence a combined 49 bits high resolution output. The ST block of the encoder consists of a patterned disk, a light source and photosensitive elements to translate the mechanical motion into electrical signal. It is designed with a selection of serial communication protocols, with dedicated electronic circuit designed for a robust signal communication.
Broadcom® AR49 series encoders offer bundles of intelligent features such as Built-In Temperature Sensor, User Programmable Resolution, Zero Reset, System Alarm and more. It comes with a recommended high temperature range of –40°C to 115°C. One of the key advantages is its multi-turn tracking that employs a proprietary energy harvesting (EH) technology by harvesting the magnetic energy as the patterned disk with magnet rotates. The counter ASIC harvests the energy generated by EH Sensor for processing rotational count and generate counting logics to the non-volatile memory, which updates and stores the counting.
The entire operation of energy generation, counting and storage processing is completed within a limited energy and short duration; hence, the kit encoder is suited for both low and high-speed measurement.

Features & Benefits
 24-bit energy harvesting multi-turn & 25-bit optical single-turn
 Accuracy upon calibration of +/-30 arc-seconds
Encoder Fault and Status bits with CRC
 Integrated differential transceiver for SSI/BiSS-C/RS485/ESL communication protocols
 Single-ended Serial Protocol Interface (SPI 4-Wire option)
 Overall encoder outer diameter Ø35 mm and maximum height of 17.5 mm
 8K bits of user accessible memory in EEPROM
 Immediate position detection on power up No battery or capacitor required for position detection during power failure
 RoHS Compliant

Applications
 AC/DC Servo Motor Feedback
 Medical & laboratory equipment
 Robotics
 Factory automation