Broadcom AEDR-9940

Programmable interpolator digital output (198.4 LPI) ideal for applications with space constraints.

Key features

• Supply voltage 3.3V or 5.0V
• Analog sine cosine or digital incremental output
• Single-ended or differential output
• Wide operating temperature range: -40ºC to 115ºC

Additional features

• Off-scale to On-scale auto calibration trigger
• High power LED 660nm, lower current encoder consumption >20mA
• Package: QFN24 (4mm x 4mm x 0.7mm nominal)

The AEDR-9940 is a three-channel reflective optical encoder. The selectable and programmable options available for three-channel digital or analog differential A, B & I output.

The AEDR-9940 in analog encoder modes, with 3 channels differential analog outputs (Sine+, Sine-, Cos+, Cos-, I+, I-), can be interfaced directly with external interpolators available.

The AEDR-9940 digital encoder mode offers two-channel (AB) quadrature digital outputs and a 3rd channel digital index outputs. Being TTL compatible, the outputs of the AEDR-9940 encoder can be interfaced with most of the signal processing circuitries. Hence the encoder provides easy integration and flexible design-in into existing systems.

The AEDR-9940 encoder is designed to operate over -40⁰C to 115⁰C temperature range and is suitable for commercial, industrial and automotive end applications.

The encoder houses a LED light source and a photo-detecting circuitry in a single package. The small size of 4.0 mm (L) x 4.0 mm (W) x 0.7 mm (H), allows it to be used in a wide range of miniature commercial application where size and space is a primary concern.

Applications

• Robotics
• Portable medical equipment
• Close loop stepper motors
• Industrial Printers
• Small motors, Actuators
• Card readers