et- lm386 description the mik386 is a pow er amplifier designed for use in low voltage c onsumer applications. the gain is internally set to 20 to keep external part count low , but the addition of an ex ternal resistor and c apasitor betw een pins 1 and 8 w ill increase the gain to any value up to 200. the inputs are ground referenced w h ile the output is automatically biased to one half the supply voltage. the quiescent pow er d r a in is only 24 milliw atts w hen operating from a 6 volt suppl y , making the mik386 ideal for battery operation. features ? battery operation ? minimun external parts ? wide supply voltage range 4v to 12v ? low quiescent current drain 4ma (ty p ) ? voltage gains: 20 - 200 ? ground referenced input ? self-centering output quiescent voltage ? low distortion applications ? am-fm radio amplifiers ? portable tape play er amplifiers ? intercoms ? tv sound sy stems ? line drivers ? ultrasonic drivers ? small servo drivers ? pow e r converters ty pical applications amplifier w i th gain= 50 (34db) + + + 3 2 - + 6 1 8 5 7 4 by p a ss 1. 2 k 10 f 0. 0 5 f 25 0 f r vc c v 10 k 10 i mi k 3 8 6 l pin connection absolute maximum ratings sy m b o l p a r a m e t e r m a x i m u m u n i t s v cc s u p p l y v o l t a g e 1 5 v p d p o w e r d i s s i p a t i o n 6 6 0 m w v in i n p u t v o l t a g e 0.4 v t j j u n c t i o n t e m p e r a t u r e + 1 5 0 c t op r operating temperature -20 ... +70 c t st g storage temperature -40 ...+125 c electrical characteristics (t a =2 5 c, v cc =6 v, r l =8 ? , f= 1khz, unless otherw i se specified) p a r a m e t e r s y m b o l c o n d i t i o n s m i n ty p m a x u n i t s quiescent current i ccq v in = 0 4 8 m a v cc =6v, thd=10% 250 325 output pow e r p out v cc =9v, thd=10% 500 700 mw pins 1 and 8 open 26 voltage gain a v 10 f from pin 1 to 8 46 db pins 1 and 8 open 300 bandw i d t h b w 10 f from pin 1 to 8 60 khz total harmonic distortion thd p out =125mw, pins 1 and 8 open 0.2 % pow e r supply rejection ratio psrr c by pas s =10 f, pins 1 and 8 open, referred to output 5 0 d b input resistance r in 5 0 k ? input bias current i bias pins 1 and 8 open 250 na page 1 of 1 beijing estek electronics co.,ltd
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