HEDS-9721#P51

HEDS-9721#P51 Datasheet

HEDS-970x, HEDS-972x Series Digital Output Small Optical Encoder Modules

Part	Datasheet
HEDS-9721#P51	HEDS-9721#P51 (pdf)

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HEDS-970x, HEDS-972x Series Digital Output Small Optical Encoder Modules Data Sheet The HEDS-9700 series is a high performance, low cost, optical incremental encoder module. When operated in conjunction with either a codewheel or codestrip, this module detects rotary or linear position. The module 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 5V supply input are accessed through four solder-plated leads located on mm inch centers. The standard HEDS-9700 is designed for use with an 11 mm optical radius codewheel, or linear codestrip. Other options are available. Please contact factory for more information. x Small Size x Low Cost x Multiple Mounting Options x Wide Resolution Range x Linear and Rotary Options Available x No Signal Adjustment Required x Insensitive to Radial and Axial Play x -40°C to +85°C Operating Temperature x Two Channel Quadrature Output x TTL Compatible x Single 5V Supply x Wave Solderable Package Dimensions Mounting Option #50 - Standard Baseplane Mounting Contact Factory for Detailed Package Dimensions ESD WARNING NORMAL HANDLING PRECAUTIONS SHOULD BE TAKEN TO AVOID STATIC DISCHARGE. Theory of Operation The HEDS-9700 provides sophisticated motion detection The HEDS-9700 is a C-shaped emitter/detector module. at a low cost, making closed-loop control very cost-com- Coupled with a codewheel, it translates rotary motion petitive! Typical applications include printers, plotters, into a two-channel digital output. Coupled with a copiers, and automation equipment. Note Avago Technologies encoders are not recommended for use in safety critical applications. Eg. ABS braking systems, power steering, life support systems codestrip, it translates linear motion into a digital output. As seen in the block diagram, the module contains a single Light Emitting Diode LED as its light source. The and critical care medical equipment. Please contact light is collimated into a parallel beam by means of a sales representative if more is needed. single lens located directly over the LED. Opposite the Block Diagram RESISTOR emitter is the integrated detector circuit. This IC consists of multiple sets of photodetectors and the signal processing circuitry necessary to produce the digital VCC waveforms. LENS LED PHOTODIODES COMPARATORS A + 3 The codewheel/codestrip moves between the emitter and detector, causing the light beam to be interrupted by the pattern of spaces and bars on the codewheel/ CHANNEL A codestrip. The photodiodes which detect these interruptions are arranged in a pattern that corresponds to the 2 radius and count density of the codewheel/codestrip. BSIGNAL PROCESSING CIRCUITRY These detectors are also spaced such that a light period CHANNEL B on one pair of detectors corresponds to a dark period on 4 the adjacent pair of detectors. The photodiode outputs are fed through the signal processing circuitry. Two comparators receive these signals and produce the outputs for channels A and B. Due to this integrated GND phasing technique, the digital output of channel A is in 1 quadrature with channel B 90 degrees out of phase . EMITTER SECTION CODE WHEEL DETECTOR SECTION Output Waveforms Pulse Width P The number of electrical degrees that an output is high during one cycle. This value is nominally 180°e or 1/2 cycle. Pulse Width Error 'P The deviation, in electrical deCHANNEL A grees, of the pulse width from its ideal value of 180°e. Ordering Information HEDS-97 Option 0 Rotary 2 Linear Lead Bend 0 Straight Leads 1 Bent Leads Resolution Options 11 mm optical radius, Rop K 96 CPR C 100 CPR D 192 CPR E 200 CPR F 256 CPR G 360 CPR H 400 CPR Linear L 120 LPI M 127 LPI P 150 LPI Contact Factory for Other Resolution Options Note Please contact factory for codewheel and codestrip information. Mounting Options 50 Standard 51 Rounded Outline 52 Backplane 53 Standard w/Posts 54 Tabless 55 Backplane w/Posts HEDS-9700 HEDS-9701 50 51 52 53 F*** H* * * 54 55 HEDS-9720 HEDS-9721 * * * * 50 51 52 53 54 55 P*** For product information and a complete list of distributors, please go to our web site: Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies in the United States and other countries. Data subject to change. Copyright 2005-2010 Avago Technologies. All rights reserved. Obsoletes 5988-8045EN AV02-0511EN - February 5, 2010

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HEDS-970x, HEDS-972x Series Digital Output Small Optical Encoder Modules

Data Sheet

The HEDS-9700 series is a high performance, low cost, optical incremental encoder module. When operated in conjunction with either a codewheel or codestrip, this module detects rotary or linear position. The module 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 5V supply input are accessed through four solder-plated leads located on mm inch centers.

The standard HEDS-9700 is designed for use with an 11 mm optical radius codewheel, or linear codestrip. Other options are available. Please contact factory for more information.
x Small Size x Low Cost x Multiple Mounting Options x Wide Resolution Range x Linear and Rotary Options Available x No Signal Adjustment Required x Insensitive to Radial and Axial Play x -40°C to +85°C Operating Temperature x Two Channel Quadrature Output x TTL Compatible x Single 5V Supply x Wave Solderable

Package Dimensions

Mounting Option #50 - Standard Baseplane Mounting Contact Factory for Detailed Package Dimensions ESD WARNING NORMAL HANDLING PRECAUTIONS SHOULD BE TAKEN TO AVOID STATIC DISCHARGE.

Theory of Operation

The HEDS-9700 provides sophisticated motion detection The HEDS-9700 is a C-shaped emitter/detector module.
at a low cost, making closed-loop control very cost-com- Coupled with a codewheel, it translates rotary motion petitive! Typical applications include printers, plotters, into a two-channel digital output. Coupled with a
copiers, and automation equipment.

Note Avago Technologies encoders are not recommended for use in safety critical applications. Eg. ABS braking systems, power steering, life support systems
codestrip, it translates linear motion into a digital output.

As seen in the block diagram, the module contains a single Light Emitting Diode LED as its light source. The
and critical care medical equipment. Please contact light is collimated into a parallel beam by means of a
sales representative if more is needed.
single lens located directly over the LED. Opposite the

Block Diagram

RESISTOR
emitter is the integrated detector circuit. This IC consists of multiple sets of photodetectors and the signal processing circuitry necessary to produce the digital VCC waveforms.

LENS LED

PHOTODIODES

COMPARATORS A +
3 The codewheel/codestrip moves between the emitter
and detector, causing the light beam to be interrupted
by the pattern of spaces and bars on the codewheel/

CHANNEL A
codestrip. The photodiodes which detect these interruptions are arranged in a pattern that corresponds to the
2 radius and count density of the codewheel/codestrip.

BSIGNAL PROCESSING CIRCUITRY

These detectors are also spaced such that a light period CHANNEL B on one pair of detectors corresponds to a dark period on
4 the adjacent pair of detectors. The photodiode outputs are fed through the signal processing circuitry. Two comparators receive these signals and produce the outputs for channels A and B. Due to this integrated

GND phasing technique, the digital output of channel A is in
1 quadrature with channel B 90 degrees out of phase .

EMITTER SECTION

CODE WHEEL

DETECTOR SECTION

Output Waveforms

Pulse Width P The number of electrical degrees that an output is high during one cycle. This value is nominally 180°e or 1/2 cycle.

Pulse Width Error 'P The deviation, in electrical deCHANNEL A grees, of the pulse width from its ideal value of 180°e.
Ordering Information

HEDS-97

Option
0 Rotary 2 Linear

Lead Bend 0 Straight Leads 1 Bent Leads

Resolution Options 11 mm optical radius, Rop K 96 CPR C 100 CPR D 192 CPR E 200 CPR F 256 CPR G 360 CPR H 400 CPR Linear L 120 LPI M 127 LPI P 150 LPI

Contact Factory for Other Resolution Options

Note Please contact factory for codewheel and codestrip information.

Mounting Options 50 Standard 51 Rounded Outline 52 Backplane 53 Standard w/Posts 54 Tabless 55 Backplane w/Posts

HEDS-9700 HEDS-9701
50 51 52 53

F***

H* * *
54 55 HEDS-9720

HEDS-9721 * * * *
50 51 52 53 54 55

P***

For product information and a complete list of distributors, please go to our web site:

Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies in the United States and other countries. Data subject to change. Copyright 2005-2010 Avago Technologies. All rights reserved. Obsoletes 5988-8045EN AV02-0511EN - February 5, 2010

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived HEDS-9721#P51 Datasheet file may be downloaded here without warranties.

Datasheet ID: HEDS-9721#P51 520290