? e94x43-te sony reserves the right to change products and specifications without prior notice. this information does not convey any license by any implication or otherwise under any patents or other right. application circuits shown, if any, are typical examples illustrating the operation of the devices. sony cannot assume responsibility for any problems arising out of the use of these circuits. absolute maximum ratings (ta=25?) supply voltage v cc 6v operating temperature topr ?0 to 90 ? storage temperature tstg ?0 to 90 ? allowable power dissipation p d 150 mw recommended operating conditions supply voltage v cc 2.5 to 5.5 v description the CXA1915AN is a photo ic developed as a photo detector for the optical pickup of minidisc. the photodiode for rf signal detection has a built-in i-v amplifier and features low output impedance for stable output. focus servo: astigmatic method tracking servo: three-spot method magneto optical signal (rf signal) detection: wollaston prism method features i-v amplifier (current-voltage conversion circuit) ultra-compact transparent molded package (ssop) applications optical pickup for minidisc structure bipolar silicon monolithic ic i-v photo ic for minidisc 16 pin pd-s (plastic) CXA1915AN
? CXA1915AN photo detector pattern dimensions circuit block diagram r=115k a, b, c, d, e, f, i, and j are photodiodes. a b cd e f 0.45 mm from package center 2.20 mm from reference side 160 160 5 135 135 70 150 145 j i 35 1.75 mm from reference side package center 5 8 10 1 2 4 7 5 6 do ao jo bo co fo vcc vc gnd eo 3 9 r 12 io gnd 11 r j i b f c a d e (unit: ?)
? CXA1915AN electrical and optical characteristics (v cc =3.0v, v c =1.5v, ta=25?) note) 1. vc is reference for output voltage and output offset voltage. 2. gnd is reference for maximum output voltage. 3. output voltage and frequency response are subject to conformation of design. measurement circuit item symbol conditions min. typ. max. unit current consumption i cc in the dark 2.2 3.2 ma dark current (a to f) i d in the dark 4.0 na optical sensitivity (a to f) s p o =5?, l = 780nm 0.3 0.4 a/w output offset voltage (i, j) voff in the dark -10 5.5 10 output offset voltage difference (i-j) ? voff in the dark -10 0 10 mv output voltage (i, j) v o p o =5?, l = 780nm 100 130 160 maximum output voltage (i, j) vomax p o =100?, l = 780nm 2.7 2.8 v frequency response (i, j) fc 100khz reference, -3 db 1.8 2.3 mhz 4k 1k 1k 1k 1k 1k 1k 4k 100pf 8 10 1 2 4 7 5 6 do ao jo bo co fo vcc vc gnd eo 3 9 12 io gnd 11 1.5v 3.0v 100pf ww ww w www
? CXA1915AN photo detector position accuracy in position of photo detector (the reference side shown above is reference.) x, y : ?.2 mm z : ?.2 mm q : ? 0.38 reference side photo detector side 1.75 1 2.20 photo detector center reference side 0.45 photo detector center reference side j i (unit: mm)
? CXA1915AN example of representative characteristics 0 2 4 6 8 10 ?5 0 25 50 100 75 i and j offset voltage vs. ambient temperature characteristics v cc =3.0v, v c =1.5v in the dark state ta-ambient temperature (?) voff-offset voltage (mv) 0.1 1 100 10 0 25 50 100 75 a to f dark current vs. ambient temperature characteristics v cc =3.0v, v c =1.5v in the dark state ta-ambient temperature (?) i d -dark current (pa) e, f a to d 0 1 2 3 4 5 ?5 0 25 50 100 75 current consumption vs. ambient temperature characteristics in the dark state ta-ambient temperature (?) i cc -current consumption (ma) v cc =6.0v, v c =3.0v v cc =3.0v, v c =1.5v v cc =2.5v, v c =1.25v
? CXA1915AN 1v c i 2i o o 11 j o 3 9 gnd i 4f o 5c o 6d o o 7e o 8a o 10 b o 12 v cc i 129 1 500 a 16k 8k v c 129 2 11 for a dual positive/negative power supply: gnd for a single power supply: center voltage input output of electrical signals converted from optical signals for a dual positive/negative power supply: negative power supply for a single power supply: gnd output of electrical signals converted from optical signals (cathode pin of photodiode) positive power supply pin no. symbol i/o equivalent circuit description photodiode photo current light 129 4 5 6 7 8 10 pin description
? CXA1915AN notes on operation 1. connection to rf amplifiers in the CXA1915AN, the rf signals (i, j) are of the voltage-output type. therefore, the rf amplifier should have an i-v amplifier at the input block because the servo signals (a to f) are of current-output type. 2. power supply the CXA1915AN can be used either with a dual positive/negative power supply or with a single power supply. however, this ic is not provided with a center voltage generating circuit, and so when used with a single power supply the center voltage must be supplied by an rf amplifier or some other device. power supply connections for each case are as follows. note) pins 3 and 9 are shorted in the ic. for both a dual positive/negative power supply and a single power supply, the voltage difference between the vcc and gnd pins should be within the range of 2.5 v and 5.5 v. (12) v cc (3) (9) gnd (1) v c dual positive/ positive power supply negative power supply gnd negative power supply single power supply positive power supply gnd center voltage
sony code eiaj code jedec code package weight 0.04g pd-s-16 * 3.5 0.1 f 2 mirror * 3.5 0.1 5.5 0.2 0.22 0.5 datum plane 10 15? 1?(all sides) 1.8 0.2 0.985 0.1 0.145 pd-s-16 a b 0.5 0.15 0?to 10 0.1 + 0.1 ?0.05 0.22 + 0.05 ?0.04 0.145 + 0.025 ?0.015 (0.125) (0.2) detail a detail b 0.1 0.1 m note: dimension * ?does not include mold protrusion. package outline unit : mm CXA1915AN ?
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