5 dot led level meter driver S1A2284A04 1 introduction the S1A2284A04 is a monolithic integrated circuit designed for 5-dot led level meter drivers with a built-in rectifying amplifier. it is suitable for ac/dc level meters such as vu meters or sig- nal meters. features ? high gain rectifying amplifier included (gv = 26db) ? low radiation noise when led turns on ? linear indicator for 5-dot bar type led (0.33, 0.67, 1, 1.33, 1.67) ? constant current output S1A2284A04: i o = 15ma (typ) ? wide operating supply voltage range: v cc = 3.5v - 16 v ? minimum number of external parts required ordering information block diagram device package operating temperature id S1A2284A04-i0u0 9 - sip - 20 c - + 80 c 15ma 9 - sip 1 2 3 4 5 6 7 8 9 d5 d4 d3 d2 d1 led driver reference voltage d1 d2 d3 d4 gnd d5 output input v cc
S1A2284A04 5 dot led level meter driver 2 absolute maximum ratings (t a = 25 c) note : 11mw/ c = c is decreased at higher temperatures than ta = 25 c . electrical characteristics (ta =25 c , v cc = 6v, f =1khz, unless otherwise specified) note : definition of 1; pin 3 voltage when v cl (on)3 turn on (65mv) characteristic symbol value unit supply voltage v cc 18 v amp input voltage v 8-5 -0.5 - v cc v pin 7 voltage v 7-5 6 v d terminal output voltage v d 18 v circuit current i cc 12 ma d terminal output current i d 20 ma power dissipation p d 1100 mw operating temperature t opr - 20 - +80 c storage temperature t stg - 40 - +125 c characteristic symbol test conditions min. typ. max. unit quiescent circuit current i ccq v i = 0v - 6 8.5 ma d output current i o v i = 0.15v 11 15 18.5 ma input bias current i bias - - 1 - 0 m a amp gain g v v i = 0.1v 24 26 28 db v cl(on)1 0.28 0.33 0.40 v cl(on)2 0.59 0.67 0.75 comparator on level v cl (on) v cl(on)3 - - 1 - v 3 v cl(on)4 1.25 1.33 1.42 v cl(on)5 1.48 1.67 1.87
5 dot led level meter driver S1A2284A04 3 test circuit the recommended value of r at t a (max) = 60 c. by changing the time constant c 1 and the response c 2 , attack and release time may be varied. in the above appli- cation conditions, power dissipation may be operated at higher levels than the absolute maximum ratings. the wattage of r is to be determined by the total led current and r value recommended by the r table. v cc (v) 8 - 12 10 - 14 12 - 16 r( w ) 47 68 91 d1 10m f/16v 10k w d2 d3 d4 d5 10k w 2.2m f/16v input c1 r vcc c2 c2 : ac in, 2.2 m f is used. dc in, 2.2 m f is shorted. S1A2284A04 1 2 3 4 5 6 9 8 7
S1A2284A04 5 dot led level meter driver 4 notes
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