Data Sheet AEDR-9820 Three Channels Reflective Incremental Encoders Analog and Digital Output (225 LPI) Description Features The Broadcom AEDR-9820 is a three-channel reflective Analog Output option Two-channel differential analog output and differential digital or analog index output. optical encoder. It can be configured to analog or digital outputs employing reflective technology for motion control Digital Output option Three-channel differential or TTL compatible two-channel quadrature (AB) digital outputs purposes. The selectable options available are two for direction sensing and a third channel, index digital channels differential analog with a third channel differential output. digital or analog index output or three-channel digital Built in interpolator for 1x, 2x, 4x, 8x, and 16x differential A, B, and I output. interpolation. The AEDR-9820 in analog encoder modes, with Surface mount leadless package 4.0 mm (L) two-channel differential analog outputs (Sin, /Sin, Cos, 4.0 mm (W) 1.05 mm (H). /Cos), can be interfaced directly with external interpolators Operating voltage of 3.3V and 5.0V supply. available. Built-in LED current regulation. Wide operating temperature range from 40C to The AEDR-9820 in digital encoder mode offers two-channel 115C. (AB) quadrature digital outputs and a third channel digital High encoding resolution: 225 LPI (lines/in.) or index output. Being TTL compatible, the outputs of the 8.86 LPmm (lines/mm). AEDR-9820 encoder can be interfaced with most of the signal processing circuitries. Therefore, the encoder Applications provides easy integration and flexible design into existing systems. Closed-loop stepper motors Small motors, actuators The AEDR-9820 encoder is designed to operate over 40C Industrial printers to 115C temperature range and is suitable for commercial, Robotics industrial, and automotive end applications. Card readers The encoder houses an infrared LED light source and a Pan-tilt-zoom camera photodetecting circuitry in a single package. The small size Portable medical equipment of 4.00 mm (L) 4.00 mm (W) 1.05 mm (H) allows it to be Optometric equipment used in a wide range of miniature commercial applications, Linear stages where size and space are primary concerns. Broadcom AEDR-9820-DS101 October 14, 2020AEDR-9820 Data Sheet Three Channels Reflective Incremental Encoders Analog and Digital Output (225 LPI) Output Waveforms Analog Output Option Figure 1: Analog Output Option Figure 2: Code Wheel Rotation Movement (Counter-clockwise) Test Parameter Definitions Analog Peak-to-Peak Vpp The peak-to-peak signal magnitude in V of the analog signal. Analog Offset V The offset in mV from the mid-point of the analog peak-to-peak signal to the zero OFFSET voltage point. Analog Peak/Valley Voltage V , V The value in V of the peak/valley of the analog signal (that is, one-sided reading). PA PB V , V MA MB Analog Peak to Peak Voltage V , V The absolute difference between V and V of channel A or B. PPA PPB P M Broadcom AEDR-9820-DS101 2