View HEDS-9731152_6757811.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

features ? small size ? low cost ? multiple mounting options ? wide resolution range ? linear and rotary options available ? no signal adjustment required ? insensitive to radial and axial play ? - 4 0 c to +85 c operating temperature heds-973x series ? high resolution version of the heds-970x ? two channel quadrature output ? ttl compatible ? single 5 v supply ? wave solderable description the heds-973x series is a high performance, low cost, optical incremental encoder module. when operated in conjunction small optical encoder modules technical data esd warning: normal handling precautions should be taken to avoid static discharge. package dimensions mounting option #50 - standard (baseplane mounting) contact factory for detailed package dimensions
2 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 pack- age. due to a highly collimated light source and a unique photo- detector array, the module is extremely tolerant to mounting misalignment. the two channel digital outputs and 5 v supply input are accessed through four solder-plated leads located on 2.54 mm (0.1 inch) centers. the standard heds-973x is designed for use with an 11 mm optical radius codewheel, or linear codestrip. other options are available. please contact factory for more information. applications the heds-973x provides sophisticated motion detection at a low cost, making closed-loop control very cost-competitive! typical applications include printers, plotters, copiers, and office automation equipment. theory of operation the heds-973x is a c-shaped emitter/detector module. 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. as seen in the block diagram, the module contains a single light emitting diode (led) as its light source. the light is collimated into a parallel beam by means of a single lens located directly over the led. opposite the emitter is the integrated detector circuit. this ic consists of multiple sets of photodetectors and the signal processing circuitry necessary to produce the digital waveforms. the codewheel/codestrip moves between the emitter and detector, causing the light beam to be inter- rupted by the pattern of spaces and bars on the codewheel/code- strip. the photodiodes which detect these interruptions are arranged in a pattern that corre- sponds to the radius and count density of the codewheel/code- strip. these detectors are also spaced such that a light period on one pair of detectors corresponds to a dark period on the adjacent pair of detectors. the photodiode outputs are fed through the signal processing circuitry. two com- parators receive these signals and produce the final outputs for channels a and b. due to this integrated phasing technique, the digital output of channel a is in quadrature with channel b (90 degrees out of phase). block diagram
3 phase ( f ): the number of electrical degrees between the center of the high state of channel a and the center of the high state of channel b. this value is nominally 90 e for quadrature output. phase error ( df ): the deviation of the phase from its ideal value of 90 e. direction of rotation: when the codewheel rotates counterclock- wise, as viewed looking down on the module (so the marking is visible), channel a will lead channel b. if the codewheel rotates in the opposite direction, channel b will lead channel a. optical radius (rop): the distance from the codewheels center of rotation to the optical center (o.c.) of the encoder module. angular misalignment error (e a ): angular misalignment of the sensor in relation to the tangential direction. this applies for both rotary and linear motion. mounting position (r m ): distance from motor shaft center of rotation to center of alignment tab receiving hole. output waveforms definitions count (n) = the number of bar and window pairs or counts per revolution (cpr) of the codewheel, or the number of lines per inch of the codestrip (lpi). 1 shaft rotation = 360 mechanical degrees = n cycles 1 cycle (c) = 360 electrical degrees ( e) = 1 bar and window pair 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 ( d p): the deviation, in electrical degrees, of the pulse width from its ideal value of 180 e. state width (s): the number of electrical degrees between a transition in the output of channel a and the neighboring transition in the output of channel b. there are 4 states per cycle, each nominally 90 e. state width error ( d s): the deviation, in electrical degrees, of each state width from its ideal value of 90 e.
4 recommended operating conditions parameter symbol min. typ. max. units notes 85 option a & q temperature t -40 c 70 all other options supply voltage v cc 4.5 5.0 5.5 v ripple < 100 mv p-p load capacitance c l 100 pf 3.2 k w pull-up count frequency 40 khz (velocity (rpm) x n)/60 angular misalignment e a -2.0 0.0 +2.0 deg. mounting position r m r op -0.14 mm (in.) (r op -0.006) note: the module performance is specified at 40 khz but can operate at higher frequencies. absolute maximum ratings parameter symbol min. max. units notes storage temperature t s -40 85 c option a & q 70 all other options operating temperature t a -40 85 c option a & q 70 all other options supply voltage v cc -0.5 7 v output voltage v o -0.5 v cc v output current per i o -1.0 5 ma channel soldering temperature 260 ct 5 sec. electrical characteristics electrical characteristics over recommended operating range, typical at 25 c. parameter symbol min. typ. max. units notes 17 40 option a & q supply current i cc ma 57 85 all other options high level output voltage v oh 2.4 v i oh = -200 m a low level output voltage v ol 0.4 v i ol = 3.86 ma rise time t r 180 ns c l = 25 pf, fall time t f 40 ns r l = 3.3 k w pull-up c l shaft 0.13 mm (0.005) see mounting considerations mm (inch)
5 encoding characteristics encoding characteristics over recommended operating condition and recommended mounting tolerances. these characteristics do not include codewheel/codestrip contribution. the typical values are averages over the full rotation of the codewheel. for operation above 40 khz, see frequency derating curves. parameter symbol typical maximum units pulse width error d p545 e logic state width error d s345 e phase error df 215 e note: 3.3 k w pull-up resistors used on all encoder module outputs. frequency derating curves typical performance over extended operating range. these curves were derived using a 25 pf load with a 3.3 k pull-up resistor. greater load capacitances will cause more error than shown in these graphs. change in state width error (electrical degrees) 0 200 0 -15 frequency (khz) 100 -10 -5 50 150 -40 ? +25 ? +85 ? ab change in pulse width error (electrical degrees) 0 200 15 -5 frequency (khz) 5 100 0 10 50 150 -40 ? +25 ? +85 ?
6 mounting option #51 C screwmount (baseplane mounting) recommended codewheel and codestrip characteristics parameter symbol min. max. units notes window/bar ratio ww/wb 0.7 1.4 window length (rotary) lw 1.80 2.30 mm (0.071) (0.091) (inch) absolute maximum codewheel rc rop + 3.40 mm includes eccenC radius (rotary) (rop + 0.134) (inch) tricity errors center of post to inside w1 1.04 mm edge of window (0.041) (inch) center of post to outside w2 0.76 mm edge of window (0.030) (inch) center of post to inside edge l 3.60 mm of codestrip (0.142) (inch) optional packages available hp 3.8 0.150 5.5 0.217 6.40 0.252 0.14 0.006 0.50 0.020 2.00 0.079 2x f 7.5 0.295 10.1 0.398 3.9 0.152 4.34 0.171 (optical center) 2.8 0.110 f 10.8 0.425 3.0 0.118 0.8 0.031 4.2 0.167 3.9 0.154 1.7 0.067 1.8 0.071 9.8 0.386 lead thickness: 0.25 0.010 12.6 0.496 7.0 0.276 15.0 0.591 20.2 0.795 pin 1 identifier h97x0 yyww x 51 ch b v cc ch a gnd dimensions are millimeters inches
7 optional packages available (cont'd.) mounting option #52 C backplane (backplane mounting) mounting option #53 C standard with posts (baseplane mounting)
8 optional packages available (cont'd.) mounting option #54 C tabless (baseplane mounting) mounting option #55 C backplane with posts (backplane mounting)
9 note: these dimensions include shaft end play and codewheel warp. for both rotary and linear motion, angular misalignment, e a , must be 2 degrees to achieve encoding characteristics. all dimensions for mounting the module and codewheel/codestrip should be measured with respect to the two mounting posts, shown above. mounting considerations recommended screw size: m2.5 x 0.45 or 2-56 bent lead option e a alignment tab receiving hole 4.44 0.13 0.175 0.005 image side of codewheel/codestrip a 0.13 mm (0.005") center of rotation motor shaft center ?a rm
10 wave solder conditions flux C rma water soluble (per mil-f-14256d) process parameters 1. flux 2. pre-heat 60 seconds total pcb top side @ 230 c pcb bottom side @ 260 c 3. wave solder 255 c, 1.2 meters/min line speed 4. hot water wash 1st: 30 c 45 seconds 2nd: 70 c 90 seconds 5. rinse 1st: 23 c 45 seconds 2nd: 23 c 45 seconds 6. dry 1st: 80 c 105 seconds 2nd: 95 c 105 seconds typical interface host processor ch b ch a hedsC9730 hctl-2016/2020 quadrature decoder/ counter
11 50 51 52 53 54 55 heds-9730 a * * q* * 2* 1 b j heds-9731 a * q* 2** * *** 1** * *** b** * *** j** * *** heds-9732/33 t * * * * * * u** * *** heds-973 option ordering information lead bend 0 C straight leads 1 C bent leads 2 C straight leads 3 C bent leads resolution options a C 500 cpr, 11 mm rop b C 1000 cpr, 11 mm rop j C 1024 cpr, 11 mm rop q C 180 lpi, linear 2 C 300 lpi, linear 1 C 360 lpi, linear t C 2000 cpr, 23.36 mm rop u C 2048 cpr, 23.36 mm rop mounting options 50 C standard 51 C screwmount 52 C backplane 53 C standard w/posts 54 C tabless 55 C backplane w/posts note: please contact factory for codewheel and codestrip information.
www.semiconductor.agilent.com data subject to change. copyright ? 2001 agilent technologies, inc. may 4, 2001 obsoletes 5968-1095e (9/98) 5988-2499en

▲Up To Search▲

Price & Availability of HEDS-9731152

	To Download HEDS-9731152 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .