1/4 www.rohm.com c 2011 rohm co., ltd. all rights reserved. 2011.03 - rev.b contact image sensor heads for narrow-width scanners LSH2004-AA20A compatible with a6 size media, feature a dual-arch structure, allowing straight pa ss reading (both-directions). in addition, th ey are compact, measuring only 119.5mm in length. ? applications check readers, card scanners, and a va riety of other image input devices. ? features 1) signal amplifier integrated into each sens or ic in order to eliminate external noi se ; compatible with 3.3v interface. 2) led light source mounted on the same subs trate as the sensor chip itself, resulti ng in a more compact, lightweight package. 3) proprietary prism maintains a uniform output signal. 4) ceramic substrate used, ensuring excell ent dimensional and thermal stability. ? dimensions (unit : mm) pin no. signal paper feed direction (note 2) socket housing:il-z-9s-s125c3(jae) socket contact:il-z-c3-a-15000(jae) (note 1) deflection at the top of glass:0-0.25 projection to platen is positive. pin no. signal no.1 no.2 no.3 no.4 no.5 no.7 no.8 no.9 no.6 clk sp vdd gnd ao rled gled bled vled 12.5 0.05 2.5 2 0.05 (depth 1) 60 0.3 29.75 0.3 no.1 pixel c l a 3.96 0.5 109.6 (effectiv reading width :104.6) 119.5 0.3 5.5 0.3 (12.9) no.1 no.9 max. 1.5 15.5 1 25 1 (3.8) max.2 5 0.1 10.7 0.4 17.5 0.25
2/4 www.rohm.com c 2011 rohm co., ltd. all rights reserved. 2011.03 - rev.b data sheet LSH2004-AA20A ? characteristics parameter slt clk 104.6 200 864 3.3 0.125 3 8 0.5 0.25 0.8 0.2 5 to 45 mm dpi dots v ms / line mhz v v v c symbol typ. unit vrmin. vrmax. ? ? ? ? vod v dd effective scanning width primary scan dot density total dot number power supply voltage scanning speed clock frequency maximum dynamic range minimum dynamic range dark output operating temperature ? pin assignments v dd circuit clk no. clock start pulse power supply analog output led ground led ground led ground 1 2 3 4 5 6 7 i i i o i i i / o functions sp rled gled 8i bled led power supply 9i vled ground i gnd ao
3/4 www.rohm.com c 2011 rohm co., ltd. all rights reserved. 2011.03 - rev.b data sheet LSH2004-AA20A ? timing chart (a) clk timing chart thold tsetup 50% 50% 50% 50% 50% 1/fclk twclk twclk ts c lk sp a o 1pixel 2pixel 50% (b) data output timing chart after turning on the sp pulse, the analog output shape st arts from the setting up point of 65 clock pulse. note) output blank part cannot be used as the analog output standard level. clk sp ao 1 2 64 65 66 v ref output period (64pixels) analog output period 1 to 64 pixels 1 to 864pixels
4/4 www.rohm.com c 2011 rohm co., ltd. all rights reserved. 2011.03 - rev.b data sheet LSH2004-AA20A ? inner circuit v dd g nd sp ao clk 1 f x 4 1 f 864 680 220 1 f v dd v ref 1 analog memory circuit v led b gnd g gnd r gnd 100k ? peripheral circuit 87695 32 c3 c1 r1 r2 ao v dd sp clk gnd vled led bgr gnd 14 c4 c2 ? r1=r2=100 c1=47 f, c2=100pf c3=100 f, c4=0.1 f ? please adjust the value of resistance to fit your interface circuit.
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