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nmos linear image sensors are self-scanning photodiode arrays designed specifically as detectors for multichannel spectroscopy. the scanning circuit is made up of n-channel mos transistors, has low power consumption and is easy to handle. each photodiode has a large a ctive area, high uv sensitivity yet very low noise, delivering a high s/n even at low light levels. current output type nmos linear image s ensors also offer excellent output linearity and wide dynamic range. S3901-FX series image sensors are variants of s3901-f series nmos image sensors. having a phosphor-coated fiber optic plate (fo p) as the light input window, the S3901-FX series was developed for detection of x-rays and electrons. the S3901-FX offers particularly h igh sensitivity to x-rays from 10 k to 100 kev. the phosphor material used is gadolinium ox sulfide (gd 2 o 2 s tb) whose composition is carefully selected to provide optimum sensitivity and resolution with a peak emission at 550 nm wavelength. the S3901-FX series active area consists of a photodiode array with pixels formed at 50 m pitches and a height of 2.5 mm. the number of pixels can be selected from 256 or 512. hamamatsu s3902/s3903/s3904 series nmos linear image sensors are also available with fop windows coated with the same phosphor material as S3901-FX series. using photodiodes with no phosphor and fop window also allows direct detection of x-rays at energy levels below 10 kev. features l wide active area pixel pitch: 50 m pixel height: 2.5 mm l low dark current and high saturation charge allow a long integration time and a wide dynamic range at room temperature l excellent output linearity and sensitivity spatial uniformity l low power consumption: 1 mw max. l start pulse and clock pulse are cmos logic compatible applications l test equipment using x-ray and electron beam transmission l x-ray non-destructive inspection l x-ray and electron beam detector image sensor nmos linear image sensor image sensor highly sensitive to x-rays from 10 k to 100 kev S3901-FX series 2.5 mm 1.0 m 1.0 m 400 m oxidation silicon n type silicon p type silicon fiber optic plate 45 m 50 m phosphor material vss start st clock clock 1 2 active photodiode saturation control gate saturation control drain dummy diode dummy video active video end of scan digital shift re gister (mos shift re gister) kmpdc0020ea figure 1 equivalent circuit figure 2 active area structure

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nmos linear image sensor S3901-FX series hamamatsu photonics k.k., solid state division 1126-1 ichino-cho, higashi-ku, hamamatsu city, 435-8558 japan, telephone: (81) 53-434-3311, fax: (81) 53-434-5184, www.hamamatsu.com u.s.a.: hamamatsu corporation: 360 foothill road, p.o.box 6910, bridgewater, n.j. 08807-0910, u.s.a., telephone: (1) 908-231-0960, fax: (1) 908-231-1218 germany: hamamatsu photonics deutschland gmbh: arzbergerstr. 10, d-82211 herrsching am ammersee, germany, telephone: (49) 08152-3750, fax: (49) 08152-2658 france: hamamatsu photonics france s.a.r.l.: 19, rue du saule trapu, parc du moulin de massy, 91882 massy cedex, france, t elephone: 33-(1) 69 53 71 00, fax: 33-(1) 69 53 71 10 united kingdom: hamamatsu photonics uk limited: 2 howard court, 10 tewin road, welwyn garden city, hertfordshire al7 1bw, united kingdom, telephone: (44) 1707-294888, fax: (44) 1707-325777 north europe: hamamatsu photonics norden ab: smidesv ? gen 12, se-171 41 solna, sweden, telephone: (46) 8-509-031-00, fax: (46) 8-509-031-01 italy: hamamatsu photonics italia s.r.l.: strada della moia, 1/e, 20020 arese, (milano), italy, telephone: (39) 02-935-81-733, fax: (39) 02-935-81-741 information furnished by hamamatsu is believed to be reliable. however, no responsibility is assumed for possible inaccuracies or omissions. specifications are subject to change without notice. no patent rights are granted to any of the circuits described herein. ?2001 hamamatsu photonics k.k. cat. no. kmpd1005e0 4 oct. 2005 dn figure 3 dimensional outlines (unit: mm) s3901-256fx 0.51 25.4 2.54 3.0 3.4 active area 12.8 2.5 6.4 0.3 31.75 10.4 5.4 0.2 5.0 0.2 0.25 10.0 10.16 photosensitive surface kmpda0031ea s3901-512fx 0.51 25.4 40.6 10.4 5.4 0.2 5.0 0.2 12.8 0.3 active area 25.6 2.5 0.25 10.16 2.54 10.0 3.0 3.4 photosensitive surface kmpda0032ea nc nc nc nc nc nc nc nc nc nc end of scan 1 2 3 4 5 6 7 8 9 10 11 22 21 20 19 18 17 16 15 14 13 12 2 1 st vss vscg nc vscd vss active video dummy video vsub vss, vsub and nc should be grounded. kmpdc0056ea figure 4 pin connection

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