HEDS-9730, HEDS-9731

Small Optical Encoder Modules 480lpi Digital Output

Data Sheet

Description

The HEDS-973X is a high performance incremental

encoder module. When operated in conjunction with

either a codewheel or codestrip, this module detects

rotary or linear position. The encoder consists of a lensed

LED source and a detector IC enclosed in a small C-

shaped plastic package. Due to a highly collimated light

source and a unique photodetector array, the module is

extremely tolerant to mounting misalignment.

The two channel digital outputs and 3.3V supply input

are accessed through four solder plated leads located on

2.54mm (0.1inch) centers.

The standard HEDS-973X is designed for use with an ap-

propriate optical radius codewheel or linear codestrip.

Other options are available. Please contact the factory for

more information.

Block Diagram

Features

• Small Size

• High Resolution

• Two Channel Quadrature Output

• Linear and Rotary Applications

• No Signal Adjustment required

• TTL or 3.3V/5V CMOS Compatible

• Wave Solderable

• Lead-free Package

• -40°C to 85°C Operating Temperature

• Single 3.3V Supply

Applications

The HEDS-973X provides sophisticated motion detection,

making closed loop control very cost competitive. Typical

applications include printers, plotters, copiers and office

automation equipment.

Note:

Avago Technologies’ encoders are not recommended for use in safety

critical applications, e.g., ABS braking systems and critical-care medical

equipment. Please contact a sales representative if more clarification is

needed.

RESISTOR

LENS

LED

COMPARATORS

PHOTO-

DIODES

SIGNAL

PROCESSING

CIRCUITRY

+

-

A

2

A

EMITTER SECTION

CODE

WHEEL

DETECTOR SECTION

+

-

B

4

GND

1

VCC

3

B

CHANNEL A

CHANNEL B

Figure 1

ESD WARNING: NORMAL HANDLING PRECAUTIONS SHOULD BE TAKEN TO AVOID STATIC DISCHARGE.