Broadcom AEDR-98x0 Reflective Incremental Encoders

Broadcom AEDR-98x0 Reflective Incremental Encoders integrate an LED light source and photo-detecting circuitry in a single package. These three-channel reflective optical encoders can be configured to analog or digital outputs employing Reflective Technology for motion control purposes. The selectable options available are two channels differential analog with a third channel differential digital or analog index output or three-channel digital differential A, B, and I output.

In analog mode, the AEDR-98x0 Encoders offer two-channel differential analog output (Sin, /Sin, Cos, /Cos), which can be interfaced directly with external interpolators.

In digital mode, the AEDR-98x0 Encoders offer two-channel (AB) quadrature digital output and a 3rd channel digital index output with differential outputs available for all channels. Being TTL compatible, the outputs can be interfaced with most of the signal processing circuitries, providing easy integration and flexible design-in into existing systems.

The AEDR-98x0 Encoders are housed in a compact 4.0mm x 4.0mm x 1.10mm package, operate over a -40°C to +115°C temperature range, and are suitable for commercial, industrial, and automotive applications.


  • Operating voltage 3.3V and 5.0V for both digital and analog mode
  • Encoding line density options
    • AEDR-9830: 318LPI (12.52LPmm) base 625CPR at RoP 7.95mm
    • AEDR-9820: 225LPI (8.86LPmm) base 256CPR at RoP 4.6mm
  • Selectable 1x, 2x, 4x, 8x, and 16x interpolation
  • Base frequency 200KHz, up to 2MHz at 16x
  • Separate optical track for index to reduce optical noise coupling, compared to integrated single track index of other parts
  • Built-in LED current regulation
  • -40°C to +115°C operating temperature range
  • 4.00mm x 4.0mm x 1.10mm surface-mount leadless package 


  • Lidar
  • Robotics
  • Portable medical equipment
  • Industrial printers
  • Card readers
  • Close loop stepper motors
  • Small motors and actuators
  • PTZ cameras
  • Optometric equipment
  • Linear stages

Output Mode Selection Table

Chart - Broadcom AEDR-98x0 Reflective Incremental Encoders

Pin Designations

Broadcom AEDR-98x0 Reflective Incremental Encoders
Published: 2020-06-25 | Updated: 2023-07-26