HEDS-9000/9100 Two Channel Optical Incremental Encoder …

1 DescriptionThe HEDS-9000 and the HEDS-9100 series are highperformance, low cost, Optical Incremental encodermodules. When used with a codewheel, these modulesdetect rotary position. The modules consist of a lensed(LED) source and a detector IC enclosed in a smallC-shaped plastic package. Due to a highly collimatedlight source and unique photodetector array, thesemodules are extremely tolerant to two Channel digital outputs and the single 5 Vsupply input are accessed through five inchsquare pins located on inch resolutions for the HEDS-9000 are 500 CPRand 1000 CPR for use with a HEDS-6100 codewheel WARNING: NORMAL HANDLING PRECAUTIONS SHOULD BE TAKEN TO AVOID STATIC ( ) ( ) ( ) ( ) ( ) ( ) DIA.( ) ( ) ( ) ( )X00 YYXXOPTION ( )SQR. ( ) ( ) ( ) ( ) THRUHOLE 2 X ( X ) ( ) DEEPOPTICAL ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( )OPTICALCENTER ( ) ( ) ( ) ( ) X ( X ) ( ) ( )ALIGNING DIA.

2 ( ) ( ) DEEPOPTICALCENTER45 ( ) ( ) ( ) ( ) ( ) ( )VCCGND5 CH. B4 VCC3 CH. A2 GNDSIDE ASIDE BTYPICAL DIMENSIONS INMILLIMETERS AND (INCHES)Features High performance High resolution Low cost Easy to mount No signal adjustment required Small size -40 C to 100 C operating temperature Two Channel quadrature output TTL compatible Single 5 V supplyHEDS-9000/9100 Two Channel Optical Incremental EncoderModulesData Sheet2 For the HEDS-9100, standardresolutions between 96 CPR and512 CPR are available for usewith a HEDS-5120 codewheel HEDS-9000 and 9100provide sophisticated motiondetection at a low cost, makingthem ideal for high volumeapplications. Typical applicationsinclude printers, plotters, tapedrives, and factory : Avago Technologiesencoders are not recommendedfor use in safety criticalapplications. Eg. ABS brakingsystems, power steering, lifesupport systems and critical caremedical equipment.

3 Pleasecontact sales representative ifmore clarification is of OperationThe HEDS-9000 and 9100 are C-shaped emitter/detector with a codewheel, theytranslate the rotary motion of ashaft into a two- Channel seen in the block diagram,each module contains a singleLight Emitting Diode (LED) as itslight source. The light iscollimated into a parallel beam bymeans of a single polycarbonatelens located directly over theLED. Opposite the emitter is theintegrated detector circuit. ThisIC consists of multiple sets ofphotodetectors and the signalprocessing circuitry necessary toproduct the digital codewheel rotates betweenthe emitter and detector, causingthe light beam to be interruptedBlock Diagramby the pattern of spaces and barson the codewheel. Thephotodiodes which detect theseinterruptions are arranged in apattern that corresponds to theradius and design of the ode-wheel.

4 These detectors are alsospaced such that a light period onone pair of detectors correspondsto a dark period on the adjacentpair of detectors. The photodiodeoutputs are then fed through thesignal processing circuitryresulting in A, A, B, and B. Twocomparators receive these signalsand produce the final outputs forchannels A and B. Due to thisintegrated phasing technique, thedigital output of Channel A is inquadrature with that of Channel B(90 degrees out of phase).Output Waveforms3 Absolute Maximum RatingsStorage Temperature, C to 100 COperating Temperature, C to 100 CSupply Voltage, V to 7 VOutput Voltage, V to VCCO utput Current per Channel , mA to 5 mADefinitionsCount (N): The number of barand window pairs or counts perrevolution (CPR) of Shaft Rotation = 360mechanicaldegrees,= N cycles. 1 cycle (C) = 360electricaldegrees ( e),= 1 bar andwindow Width (P): The number ofelectrical degrees that an outputis high during 1 cycle.

5 This valueis nominally 180 e or 1/2 Width Error ( P): Thedeviation, in electrical degrees ofthe pulse width from its idealvalue of 180 Width (S): The number ofelectrical degrees between atransition in the output of channelA and the neighboring transitionin the output of Channel B. Thereare 4 states per cycle, eachnominally 90 Width Error ( S): Thedeviation, in electrical degrees, ofeach state width from its idealvalue of 90 ( ): The number of elec-trical degrees between the centerof the high state of Channel A andthe center of the high state ofchannel B. This value is nominally90 e for quadrature Error ( ): The deviationof the phase from its ideal valueof 90 of Rotation: When thecodewheel rotates in the directionof the arrow on top of themodule, Channel A will leadchannel B. If the codewheelrotates in the opposite direction, Channel B will lead Channel Radius (Rop): The dis-tance from the codewheel s centerof rotation to the Optical center( ) of the Encoder Operating Conditions NotesTemperatureT-40100 CSupply < 100 mVp-pLoad k pull-up resistorCount Frequencyf100kHzVelocity (rpm) x N60 Note: The module performance is guaranteed to 100 kHz but can operate at higher CharacteristicsEncoding Characteristics over Recommended Operating Range and Recommended Mounting Characteristics do not include codewheel/codestrip 1 2 Width Error P30 40 eLogic State Width Error S30 40 ePhase Error 210105 eCase 1: Module mounted on tolerance circle of mm ( in.)

6 Case 2: HEDS-9000 mounted on tolerances of mm ( ").HEDS-9100 mounted ontolerances of mm ( ").4 Electrical CharacteristicsElectrical Characteristics over Recommended Operating Range, typical at 25 NotesSupply CurrentICC1740mAHigh Level Output = -40 A Level Output = mARise Timetr200nsCL = 25 pFFall Timetf50nsRL = 11 k pull-upDerating Curves over Extended Operating Frequencies ( HEDS-9000/9100 )Below are the derating curves for state, duty, phase and VOH over extended operating frequencies of up to240 kHz (recommended maximum frequency is 100 kHz). The curves were derived using standard TTL load. 40 C operation is not feasible above 160 kHz because VOH will drop below V (the minmum TTL for logicstate high) beyond that (kHz)-400 CHANGE IN PULSE WIDTH ERROR(ELECTRICAL DEGREE)240-30-20160-10140200180100 C25 C-40 C-50120220 FREQUENCY (kHz)1050 CHANGE IN STATE WIDTH ERROR(ELECTRICAL DEGREE)240203016040140200180100 C25 C-40 C0120220 FREQUENCY (kHz)-100 CHANGE IN PHASE ERROR(ELECTRICAL DEGREE)240-5160140200180100 C25 C-40 C120220 FREQUENCY (kHz)35 CHANGE IN VOH (VOLTS)2404160140200180100 C25 C-40 C2105 Recommended Codewheel CharacteristicsFigure 1.

7 Codestrip DesignCodewheel OptionsOpticalHEDSCPRR adiusSeries(N)Optionmm (in.) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ParameterSymbolMinimumMaximumUnitsNotesW indow/Bar Ratio w/ ( ) ( )mm (inch)Absolute MaximumRCROP + ( ) mm (inch) Includes eccentricityCodewheel Radiuserrors6 Mounting ConsiderationsFigure 2. Mounting Plane Side 3. Mounting Plane Side 4. Mounting as Referenced to Side 5. Mounting as Referenced to Side 02 03 04 05 06 08 09 10 11 12 13 14 HEDS-6100 A** *B**MountingManufacturerPart NumberSurfaceAMP1203686-4 Both640442-5 Side BDuPont65039-032 withBoth4825X-000 Bwith 4-wire leads(see Fig. 6)Molex2695 series withSide B2759 series 6. HEDS-8902 JKLSTUHEDS-9000 * ** *HEDS-9000 OptionHEDS-6100 Option00 Ordering InformationResolution(Cycles/Rev)A - 500 CPRB - 1000 CPRJ - 1024 CPRT - 2000 CPR*U - 2048 CPR*Shaft Diameter06 - 1/4 - 5/8 - 3/8 - 6 mm09 - 1/2 - 8 mm01 02 03 04 05 06 08 09 10 11 12 13 14 HEDS-5120 A** *C**D*E**F*G** *H**I**K**HEDS-910 0 OptionHEDS-5120 Option00 Shaft Diameter01 - 2 mm11 - 4 mm02 - 3 mm14 - 5 mm03 - 1/8 - 6 mm04 - 5/32 - 8 mm05 - 3/16 - 1/4 (Cycles/Rev)S - 50 CPRK - 96 CPRC - 100 CPRE - 200 CPRF - 256 CPRG - 360 CPRH - 400 CPRA - 500 CPR I - 512 CPRB - 1000 CPR*J - 1024 CPR*Lead0 - Straight Leads1 - Bent LeadsABCDEFGHI JKSTUHEDS-9100 * * **HEDS-9101**For product information and a complete list of distributors, please go to our website.

8 , Avago Technologies, and the A logo are trademarks of Avago Technologies Limited in the United States and other subject to change. Copyright 2006 Avago Technologies Limited. All rights reserved. Obsoletes 5988-5857EN5988-6712EN November 3, 2006