HEDS-973x Series Small Optical Encoder Modules Data Sheet Description Features The HEDS-973x series is a high performance, low cost, Small size optical incremental encoder module. When operated in Low cost conjunction with either a codewheel or codestrip, this Multiple mounting options module detects rotary or linear position. The module consists of a lensed LED source and a detector IC enclosed Wide resolution range in a small C-shaped plastic package. Due to a highly colli - Linear and rotary options available mated light source and a unique photodetector array, the No signal adjustment required module is extremely tolerant to mounting misalignment. Insensitive to radial and axial play - 40C to +85C operating temperature High resolution version of the HEDS-970x Two channel quadrature output TTL compatible 1.8 0.071 Single 5 V supply Wave solderable Package Dimensions 9.8 0.386 MILLIMETERS DIMENSIONS ARE INCHES 03.8 0.25 (OPTICAL CENTER) 10.8 LEAD THICKNESS: 0.010 0.150 0.425 0.50 1.4 3.0 0.020 R 0.055 PIN 1 IDENTIFIER 0.118 0.8 5.5 1.4 0.031 0.217 0.055 7.0 6.40 0.276 12.6 5.0 4.2 0.252 0.496 0.198 0.167 3.9 ::88 t 0.152 0.14 1.7 0.006 15.0 7.5 0.067 3.9 0.591 0.295 2.00 0.154 2X 0.079 20.2 LEAD THICKNESS 0.25 mm 10.1 0.795 LEAD PITCH 2.54 mm 0.398 Mounting Option 50 - Standard (Baseplane Mounting) Contact Factory for Detailed Package Dimensions ESD WARNING: Normal handling precautions should be taken to avoid static discharge. CH B H97X0 VCC X 50 CH A GndThe two channel digital outputs and 5 V supply input are As seen in the block diagram, the module contains a single accessed through four solder-plated leads located on .54 Light Emitting Diode (LED) as its light source. The light is mm (0.1 inch) centers. collimated into a parallel beam by means of a single lens located directly over the LED. Opposite the emitter is the The standard HEDS-973x is designed for use with an 11 integrated detector circuit. This IC consists of multiple mm optical radius codewheel, or linear codestrip. Other sets of photodetectors and the signal processing circuitry options are available. Please contact factory for more in- necessary to produce the digital waveforms. formation. The codewheel/codestrip moves between the emitter and Applications detector, causing the light beam to be interrupted by the pattern of spaces and bars on the codewheel/codestrip. The HEDS-973x provides sophisticated motion detection The photodiodes which detect these interruptions are at a low cost, mak ing closed-loop control very cost-com- arranged in a pattern that corresponds to the radius and petitive Typical applications include printers, plotters, count density of the codewheel/codestrip. These detectors copiers, and office automation equipment. are also spaced such that a light period on one pair of Note: Avago Technologies encoders are not recommended for use in detectors corresponds to a dark period on the adjacent safety critical applications. Eg. ABS brak ing systems, power steering, life pair of detectors. The photodiode outputs are fed through support systems and critical care medical equipment. Please contact the signal processing circuitry. Two comparators receive sales representative if more clarification is needed. these signals and produce the final outputs for channels Theory of Operation A and B. Due to this integrated phasing technique, the digital output of channel A is in quadrature with channel The HEDS-973X is a C-shaped emitter/detector module. B (90 degrees out of phase). Coupled with a codewheel, it translates rotary motion into a two-channel digital output. Coupled with a codestrip, it translates linear motion into a digital output. Block Diagram