S9684 series photo ic uses a dual-element si pin photodiode and compares the two signals to obtain a highly stable output even when laser power or ambient temperature fluctuates. the current amplifier is available with two gain levels (6 times and 20 times) accordi ng to laser power to be used. hamamatsu also provides s9703 series photo ic that uses a single-element si pin photodiode. features l photo ic for precision printing l high sensitivity current amplifier gain: 20 times (S9684) 6 times (S9684-01) l digital output l small package l suitable for lead-free solder reflow l active area (pd1: 2.5 0.5 mm, pd2: 2.5 0.3 mm) applications l print start timing detection for laser printers, digital copiers, fax machines, etc. photo ic photo ic for laser beam synchronous detection high-sensitivity and high-speed photo ic for high precision printing S9684 series 1 absolute maximum ratings (ta=25 c) parameter symbol value unit supply voltage vcc -0.5 to +7 v power dissipation * 1 p 300 mw output voltage * 2 vo -0.5 to +7 v output current io 5 ma ro 1 , ro 2 terminal current i ro 3ma operating temperature topr -25 to +80 c storage temperature tstg -40 to +85 c *1: derate power dissipation at a rate of -4 mw/c above ta=25 c *2: vcc=+0.5 v or less electrical and optical characteristics (ta=25 c, =780 nm, vcc=5 v, ro1=ro2=5.1 k ? , unless otherwise noted) parameter symbol condition min. typ. max. unit current consumption icc no input - - 4 ma high level output voltage v oh i oh =4 ma 4.6 - - v low level output voltage v ol i ol =4 ma, * 3 --0.3v S9684 7.5 10 12.5 threshold input power S9684-01 p th 26 35 44 w propagation delay time variation ? t p ? p i = 10 %, * 4, * 5 --5ns rise time tr - 4 7 ns fall t i m e tf - 4 7 ns maximum input power p i max. - - p th 8 w *3: p i =45 w (S9684), p i =140 w (S9684-01) *4: beam diameter (1/e 2 )=55 m, scan speed=1.18 mm/s not including jitter caused by polygon mirror non-uniformity, etc. *5: p i =45 w center (S9684), p i =140 w center (S9684-01)
photo ic for laser beam synchronous detection S9684 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.hamamats u.com u.s.a.: hamamatsu corporation: 360 foothill road, p.o.box 6910, bridgewater, n.j. 08807-0910, u.s.a., telephone: (1) 908-231-0 960, 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, teleph one: 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, unit ed 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. ?00 7 hamamatsu photonics k.k. cat. no. kpic1056e04 aug. 2007 dn kpica00 0.5 2.5 0.3 0.67 (center of active area) 3.2 ?0.2 (including burr) 3.0 * 1.0 ?0.4 1.0 ?0.4 0.05 2.4 mirror area range 0.15 2.8 2.9 3.0 * 0.45 ?0.3 3.0 * 3.4 mirror area range 3.8 3.9 4.0 * 4.0 * 4.2 ?0.2 5.0 ?0.3 0.45 ?0.3 0.27 0.75 1.3 0.8 0.8 0.8 0.1 ?0.1 0.8 (10 ) 0.3 (10 ) 0.4 0.8 photosensitive surface tolerance unless otherwise noted: ?.1, ?? shaded area indicates burr. chip position accuracy with respect to the package dimensions marked * x, y ?.2 vcc ro1 out gnd ro2 gnd gnd gnd gnd gnd photosensitive surface 2.5 0.5 0.3 pd2 details of photodiode pd1 pd2 vref vcc ro2 ro2 ro1 vo gnd pd1 current amplifier current amplifier external gain resistance ro1 external gain resistance 0.1 f5 v 2 dimensional outline (unit: mm) kpicc0108ea block diagram function S9684 series photo ic integrates a photodiode chip and an ic chip into the same package. the photodiode chip is internally connected to the ic chip as shown in the block diagram. S9684 series should be used with terminals ro1 and ro2 connected to an external gain resistance. two photocurrents are generated when a laser beam enters the dual-element photodiode. each photocurrent is fed to the input terminal of the ic and, after being amplified by the current amplifier, flows to the external gain resistance. at this time, vo ltages v ro1 and v ro2 at terminals ro1 and ro2 are given by the following expression. v ro1 (v ro2 )=a s pi ro1 (ro2) [v] a: current amplifier gain (S9684: 20 times, S9684-01: 6 times) s: photodiode sensitivity [a/w] (approx. 0.45 a/w at 780 nm) p i : input power [w] ro1, ro2: external gain resistance [ ]; usable range 2 k to 10 k v ro1 and v ro2 are input to the internal comparator so the output vo is ?high? when v ro1 > v ro2 or ?low? when v ro1 < v ro2 . we recommend using S9684 series under the operating conditions that v ro1 and v ro2 are 2 to 3 v. kpica0056eb output waveforms of terminals 2, 3 and 5 kpicc0131ea scanning direction pd1 pd2 r o 1 r o 2 v o
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