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  Datasheet File OCR Text:
  electronic giant EG8542 ??? 2011 ? ???? ? rev 1.0 ? cmos ???
???? ?? ? ? cmos ?? ? 201 1 ? ???? ? www.egmicro.com 2 / 12 ? v1.0 2011 0 9 0 2 EG8542 ?
???? ?? ? ? cmos ?? ? 201 1 ? ???? ? www.egmicro.com 3 / 12 ?? 1. ? ................................ ................................ ................................ ................................ ................................ ..... 4 2. ................................ ................................ ................................ ................................ ................................ ..... 4 3. ? ................................ ................................ ................................ ................................ ............................. 4 4. ................................ ................................ ................................ ................................ ................................ ..... 5 4.1. ? ................................ ................................ ................................ ................................ ............. 5 4.2. ................................ ................................ ................................ ................................ ............. 5 5. ?? ................................ ................................ ................................ ................................ ............................. 6 6. ................................ ................................ ................................ ................................ ............................. 7 6.1 ? ................................ ................................ ................................ ................................ ............. 7 6.2 ................................ ................................ ................................ ................................ ............. 7 7. ? ................................ ................................ ................................ ................................ ............................. 9 7.1 ?? ................................ ................................ ................................ ................................ ......... 9 7.2 ? ................................ ................................ ................................ ................................ ....... 10 7.3 ? ................................ ................................ ................................ ............................... 11 8. ? ? ................................ ................................ ................................ ................................ ........................... 12 8.1 sop8 ?? ................................ ................................ ................................ ................................ .. 12
???? ?? ? ? cmos ?? ? 201 1 ? ???? ? www.egmicro.com 4 / 12 EG8542 ?? ? 1. ? ? 2.7 v 5.5 v ? ??? 45 u a ? 4 pa ? ? 1 mhz ? ? ? ? 2. EG8542 ??? 1 mhz ? ? ? ? ?????? asic ^ EG8542 ? , ??????? , ??? EG8542 ??? , ? ????? ??? ???? 45 u a, ????? EG8542 ????? - 40 +125 ???? EG8542 ? 8 soic ? ? 3. ? ? asic ? ? ?? ? ?? ? ??? ? ? ? ? ? ?
???? ?? ? ? cmos ?? ? 201 1 ? ???? ? www.egmicro.com 5 / 12 4. 4.1. ? ? 4 - 1. EG8542 ?? 4.2. i/o 1 outa o ? a 2 ina - i ? a 3 ina+ i ? a 4 gnd gnd ???? 5 inb+ i ? b 6 inb - i ? b 7 outb o ? b 8 vcc power ???? o u t a i n b + g n d i n b - o u t b e g 8 5 4 2 1 2 3 4 5 6 7 8 i n a - i n a + v c c
???? ?? ? ? cmos ?? ? 201 1 ? ???? ? www.egmicro.com 6 / 12 5. ?? ? 5 - 1. EG8542 ?? i n b - o u t a i n b + 1 2 i n a - 3 i n a + 4 g n d 5 6 7 o u t b 8 v c c a b
???? ?? ? ? cmos ?? ? 201 1 ? ???? ? www.egmicro.com 7 / 12 6. 6.1 ? ? t a = 25 v c c ? v dd gnd ? 0 6 v vin ? - 0 6 v vdiff ? - - 6 6 v t a ? - - 45 1 2 5 tstr ? - - 65 1 5 0 tl ? t=10s - 300 ???????????????? 6.2 ? t a = 25 v c c = 5 v , v c m = 2 . 5 v vos ?? - 1 6 m v - 40 t a + 1 2 5 - - 7 m v i b ?? - 4 6 0 pa - 40 t a + 8 5 - - 1 0 0 pa - 40 t a + 1 2 5 - - 1 0 0 0 pa ios ? - 0 . 1 3 0 p a - 40 t a + 8 5 - - 50 p a - 40 t a + 1 2 5 - - 5 0 0 p a v c c ? v c c = 5 v 0 - 5 v cmrr ?? v c m = 0 v 5v 4 0 4 8 - db - 40 t a + 1 2 5 3 8 - - db avo ? ? r l = 1 0 0 k v o = 0 . 5 v 2 . 2 v 2 0 4 0 - v / m v - 40 t a + 8 5 1 0 - - v / m v - 40 t a + 1 2 5 2 - - v / m v
???? ?? ? ? cmos ?? ? 201 1 ? ???? ? www.egmicro.com 8 / 12 v os / t ??? - 40 t a + 1 2 5 - 4 - uv/ i b / t ??? - 40 t a + 8 5 - 100 - fa/ - 40 t a + 1 2 5 - 2 0 0 0 - fa/ i os / t ?? - 40 t a + 1 2 5 - 25 - fa/ v oh ??? i l =1ma, 4 . 9 4 . 9 6 5 - v - 40 t a +125 4 . 8 7 5 - - v v o l ??? i l =1ma, - 2 5 100 mv - 40 t a +125 - - 1 2 5 mv i o ut v out =v s - 1v - 3 0 - ma isc - 6 0 - ma z o ut ? f=200khz a v =1 - 4 5 - ? psrr ?? vs=2.5v 6v 65 76 - db - 40 t a + 125 6 0 - - db i sy ??? v o =0v - 4 5 6 5 ua - 40 t a +125 - - 8 5 ua ? sr ? r l =100k 0.4 5 0. 9 2 - v/us b w p ? 1 % d i s t o r t i o n - 7 0 - k h z t s ? 0. 0 1%(1v ? ) - 6 - us gbp - 1 0 0 0 - khz m - 6 7 - degrees en ?? f=1khz - 42 - nv/ hz en f=10khz - 38 - nv/ hz in ? - <0.1 - pa/ hz
???? ?? ? ? cmos ?? ? 201 1 ? ???? ? www.egmicro.com 9 / 12 7. ? 7.1 ?? EG8542 ???????? 7 .1a ? EG8542 ?? t ???? t ???????? ? q ???????? 7 .1b ??? ??? ? b ? ?????? rs cs ????????? ?????????????? 1% ??? ?????? ?? r2 r1 ?? q ? ?? q ????????????? ? 7 .1a 60hz ? t ?? q=10 ? 7 .1b 60hz ? t ?? q= ? 7 .1c EG8542 ????? fdnr ??? t ??? ?? fdnr q ?? r1 ?????? fdnr ? ?? / ??? t ??????? fdnr ? ???? u2a ?????? + 5 v 3 2 1 v i n r 1 0 0 k r 1 0 0 k c 2 6 . 7 n f c 2 6 . 7 n f 2 . 5 v r e f 2 . 5 v r e f r 1 9 7 . 5 k r 2 2 . 5 k a b r / 2 5 0 k 2 c 5 3 . 6 u f f 0 = 1 2 r c f 0 = 1 4 [ 1 - r 1 r 1 r 2 ] v o u t 1 / 2 e g 8 5 4 2 1 / 2 e g 8 5 4 2 g n d g n d 5 6 7 + 5 v 3 2 1 v i n r 1 0 0 k r 1 0 0 k c 2 6 . 7 n f c 2 6 . 7 n f 2 . 5 v r e f a r / 2 5 0 k 2 c 5 3 . 6 u f v o u t 1 / 2 e g 8 5 4 2 g n d g n d
???? ?? ? ? cmos ?? ? 201 1 ? ???? ? www.egmicro.com 10 / 12 ? 7 .1c fdnr 60 hz ?? 7.2 ? ? 7 - 2 ? EG8542 1/2 ???????????? EG8542 ? ???????? ????? r2 ? EG8542 ?? ? 5v ? 5us ??? 5us ???? ? 7 .2 EG8542 ??? ? 3 2 1 v i n r 1 q a d j u s t 2 0 0 2 . 5 v r e f a v o u t 1 / 2 e g 8 5 4 2 g n d 5 6 7 4 8 + 5 v u 1 a u 1 b 2 3 1 u 2 a u 2 b + 5 v 2 . 5 v r e f r 2 . 6 1 k r 2 . 6 1 k r 2 . 6 1 k r 2 . 6 1 k c 1 1 u f c 2 1 u f 5 2 . 5 v r e f 1 / 2 e g 8 5 4 2 1 / 2 e g 8 5 4 2 1 / 2 e g 8 5 4 2 n c f = 2 l c 1 1 l = r 2 c 2 4 8 6 7 v i n r 1 1 k 2 . 5 v r e f v o u t 1 / 2 e g 8 5 4 2 g n d 2 . 5 v d c r 2 1 m a 2 3 1
???? ?? ? ? cmos ?? ? 201 1 ? ???? ? www.egmicro.com 11 / 12 7.3 ? EG8542 ?? ???? 4pa ? ? EG8542 ??? ????? EG8542 ??????? ? 7 - 3 ????? 10m ???? ??????????????? ????????? ? ? ? ? ??? ? ????? ? 7 .3 ? ?? 2 . 5 v r e f v o u t 1 / 2 e g 8 5 4 2 r 1 0 m c 1 0 0 p f 2 . 5 v r e f o r v + 2 3 1 a
???? ?? ? ? cmos ?? ? 201 1 ? ???? ? www.egmicro.com 12 / 12 8. ? ? 8.1 sop 8 ??


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