description utilizing the circuit designs perfected for two operational amplifiers, these dual operational amplifiers feature low power drain, a common mode input voltage range extend- ing to gnd/ v , and single supply or split supply opera- ee tion. the GM358 is equivalent to one-half of an gm324. these amplifiers have several distinct advantages over standard operational amplifier types in single supply appli- cations. they can operate at supply voltages as low as 3.0 v or as high as 32 v, with quiescent currents about one-ifth of those associated with the mc1741 (on a per amplifier ba- sis). the common mode input range includes the negative supply, thereby eliminating the necessity for external bias- ing components in many applications. the output voltage range also includes the negative power supply voltage. single suppl y split suppliues features short circuit protected outputs true differential input stage single supply operation: 3.0 v to 32 v low input bias currents internally compensated common mode range extends to negative supply single and split supply operation esd clamps on the inputs increase ruggedness of the device without affecting operation g m 3 5 8 v 0 . 1 www.gammamicro.com 1 1 2 3.0v to v cc(max) v cc v / gnd ee 1 2 v cc v / gnd ee v ee 1.5v to v cc(max) 1.5v to v ee(max) a a m i c r o e l e c t r o n i c s GM358 dual operational amplifier signal conditioning
marking information & pin configura tions (top view) g m 3 5 8 2 a : assembl y location y : y ear w w : weekly package shipping sop-8 2,500 /t ape &reel units GM358s8r ordering number dip-8 sop-8 GM358d8t GM358s8t 60 units / t ube 100 / tube units sop-8 8 7 6 5 4 3 2 1 output b v cc input b- input b+ output a input a- v / gnd ee input a+ dip - 8 8 7 6 5 4 3 2 1 ordering information GM358 ayww output b v cc input b- input b+ output a input a- v / gnd ee input a+ 1 2 3 4 5 6 7 8 output a input a- v / gnd ee input a+ output b v cc input b- input b+ - + - + * for detail ordering number identification, please see last page. GM358 ayww a a m i c r o e l e c t r o n i c s GM358 dual operational amplifier signal conditioning
p ara met er sym bol v alu e uni t 32 16 32 -0.3 to 32 cont inuou s 150 238 0 to + 70 -55 t o +12 5 2000 vdc - c c/ w c c v powe r sup ply v oltag e sin gle s upply spl it su pllies input diff eren tial v oltag e ra nge ( note 1 ) input com mon mode vo ltage ran ge(n ote 2 ) outp ut sh ort c ircuit dura tion junc tion t empe ratur e ther mal r esist ance , jun ction - to - a ir (no te 3) oper ating amb ient t empe ratur e rang e stora ge t empe ratur e ra nge esd t olera nce - hum an b ody m odel (not e 4) v cc v, v cc ee v idr v icr t sc t j r q ja t a t stg - absolute maximum ratings g m 3 5 8 3 vdc vdc note 1: split power supplies. note 2: for supply voltages less 32v the absolute maximum input voltage is equal to the supply voltage. note 3: r q ja for case 846a note 4: esd data avilable upon request. a a m i c r o e l e c t r o n i c s GM358 dual operational amplifier signal conditioning
electrical characteristics (v = 5v, at specified free - air temperature, unless otherwise specified) cc g m 3 5 8 4 test conditions min typ max unit characteristics input offset voltage average t emperature coefficient of input offset voltage input offset current input bias current common-mode input voltage range high - level output voltage low - level output voltage large - signal differential voltage amplification common mode rejection ration supply voltage rejection ration crosstalk attenuation output current short - circuit output current supply current (two amplifiers) v = 1.4v o v = 5v to max cc v =max, r =2k w cc l v = 5v to max, cc v = v min ic icr v = 5v to max cc f = 1khz to 20khz v = 15v, v = 0, cc o v = 1v id v = 200mv, v = -1 oi d v at 5v, v = 0, cc o gnd at -5v v = 2.5v, no load o v = max, v = 0.5v cc o cc no load 0 to v -1.5 cc 26 27 25 15 -20 -10 10 5 3 7 2 10 -20 28 5 100 65 100 120 -30 20 0.7 1 mv v/c na pa/ c v mv v/ mv db ma a ma ma 7 9 50 150 -250 -500 20 80 1.2 2 symbol v io a v io i io i ib v icr v oh v ol a vd cmrr k svr v1 / v2 oo i o i os i cc average t emperature coefficient of input offset voltage a i io v = 5v to max cc v = v min cc icr v = 1.4v o v = 1.4v o r 2 k w l v =max, r 10k w cc l r 10k w l v =15v, v =1v to 11v , cc o r 2 k w l v = 15v, v =15v, cc o v = -1v id 25c full range full range 25c full range full range 25c full range 25c full range 25c full range full range full range 25c full range 25c 25c 25c 25c 25c full range full range 25c 25c full range full range na 0 to v- 2 cc v -1.5 cc v 65 db db 40 60 12 30 * all characteristics are measured under open loop conditions with zero common-mode input voltage unless otherwise specified. ?max? v for testing purposes is 30v . full range is 0c to 70c. cc a a m i c r o e l e c t r o n i c s GM358 dual operational amplifier signal conditioning
g m 3 5 8 5 schematic block diagram q1 q2 q3 q4 q5 q6 q7 q8 q9 q10 q11 q12 q13 q14 q15 q16 q17 q18 q19 q20 q21 q22 q23 q24 inputs 5.0pf q25 40k 25k 2.0k 2.4k v / gnd ee output v cc bias circuitry common to both amplifiers circuit description the GM358 series is made by using two internally compensated, andtwo - stage operational amplifiers. the first stage of each consists of differential input devices q20 and q18, with input buffer transistors q21 and q17, and the differential to single ended converter q3 and q4. the first stage performs not only the first stage gain function, but also performs the level shifting and transconductance reduction functions. by reducing the transconductance, a smaller compensation capacitor (only 5.0 pf) can be employed, thus saving chip area. the transconductance reduction is accomplished by splitting the collectors of q20 and q18. another feature of this input stage is that the input common mode range can include the negative supply or ground, in single supply operation, without saturating either the input devices or the differential to single - ended converter . the second stage consists a standard current source load amplifier stage. each amplifier is biased from an internal voltage regulator, which has a low temperature coefficient thus giving each amplifier good temperature characteristics as well as excellent power supply rejection. a a m i c r o e l e c t r o n i c s GM358 dual operational amplifier signal conditioning
g m 3 5 8 6 1.0 10 100 1.0k 10k 100k 1.0m 120 100 80 60 40 20 0 -20 figure 1. large-signal open loop voltage gain a , o p e n l o o p v o l t a g e r a n g e ( d b ) l v o f, frequency (hz) v = 15v cc v = gnd ee t = 25c a 14 12 10 8.0 6.0 4.0 2.0 0 1.0 10 100 1000 f, f requency (khz) v , o u t p u t v o l t a g e ( m v ) o r figure 2. large - signal frequency response r =2.0 w l v =15v cc v =gnd ee gain=-100 r =1.0k w i r =100k w f v in 1k +7 v dc 100k +5 v dc v o 2k - + 550 500 450 400 350 300 250 200 0 0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 t, time(ms) v , o u t p u t v o l t a g e ( m v ) o figure 3. small signal voltage follower pulse response (noninverting) v =30v cc v =gnd ee t =25c a c =50pf l input output - + e in e o 50pf 2.4 2.1 1.8 1.5 1.2 0.9 0.6 0.3 0 0 5.0 10 15 20 25 30 35 v , power supply voltage (v) cc i , p o w e r s u p p l y c u r r e n t ( m a ) c c figure 4. power supply current versus power supply voltage t =25c a r = l - + ma + v l d 90 80 70 0 2.0 4.0 6.0 8.0 10 12 14 16 18 20 v , power supply voltage (v) cc i , i n p u t b i a s c u r r e n t ( n a ) i b figure 5. input bias current versus supply voltage typical performance characteristics a a m i c r o e l e c t r o n i c s GM358 dual operational amplifier signal conditioning
typical applica tions - + GM358 v cc 50k 5.0k 10k c c r r v o vref vref= v cc 1 2 f= o for: f = 1.0khz o r = 16k w c = 0.01f 1 2 rc figure 6. wien bridge oscillator 1 / 2 - + GM358 1 / 2 - + GM358 1 / 2 - + GM358 1 / 2 e 1 e 2 r1 ar1 br1 1 c r 1 c r r r e 0 e = c(1 + a + b) (e - e ) 02 1 figure 7. high impedance differential amplifier - + GM358 v o vref 1 / 2 vin v oh v o hysteresis vl in vh in vref v l= (v - vref) + vref in ol v h= (v - vref) + vref in ol h= (v - v ) oh ol r1 r2 + r2 r1 r2 + r2 r1 r2 + r2 figure 8. comparator with hysteresis r1 r2 r3 - + GM358 v o vref 1 / 2 vin c0 c0 =10c v cc c c given: f = center frequency 0 a(f ) = gain center frequency 0 choose value f , c 0 then: r3 = r1 = r2 = for less than 10% error from operational amplifier. < 0.1 where f and bw are expressed in hz. 0 if source impedance varies, filter may be preceded with voltage follower buffer to stabilize filter parameter. q p f c 0 r3 2 a(f ) 0 r1 r3 2 4q r1 -r2 q f 00 bw figure 9. multiple feedback bandpass filter - + GM358 1 / 2 r1* 0.1 i l v l r2 100 v o r3 1k r l *(increase r1 for il small) + v v - 2 l v = o 1v(i ) l 1a figure 10. current monitor - + GM358 1 / 2 v o + v in v = v oi n figure 11. v oltage follower r2 r1 v ol vref = v cc 1 2 g m 3 5 8 7 a a m i c r o e l e c t r o n i c s GM358 dual operational amplifier signal conditioning
g m 3 5 8 8 a a m i c r o e l e c t r o n i c s GM358 dual operational amplifier 0.275 7.0 0.155 4.0 0.060 1.52 0.050 1.270 0.024 0.6 inches mm ( ) pad layout sop-8 p ackage outline dimensions 0.236 0.008 0.050 nom 1.270 nom +0.21 -0.20 5.990 3.91 0.1 +0.003 -0.004 0.154 pin indent 1.600 0.130 0.063 0.005 0.057 nom 1.450 nom 0.175 0.075 0.007 0.003 +0.004 -0.003 0.016 +0.10 -0.08 0.410 +0.0018 -0.0005 0.008 +0.05 -0.01 0.200 +0.013 -0.022 0.028 +0.33 -0.56 0.710 +0.002 -0.004 0.191 +0.05 -0.10 4.850 inches mm ( ) 0 ~ 8 dip-8 p ackage outline dimensions 0.015 min 0.380 min 0.26 0.006 +0.15 -0.16 6.60 0.36 0.01 +0.25 -0.26 9.14 0.180 max 4.570 max 0.125 min 3.180 min +0.002 -0.006 0.13 +0.05 -0.15 3.30 0.018 0.004 0.46 0.10 0.039 0.07 0.99 0.18 0.06 0.01 +0.26 -0.25 1.52 0.100 nom 2.540 nom 0.021 0.005 +0.12 -0.13 0.53 +0.010 -0.015 0.30 +0.25 -0.38 7.62 +0.002 -0.003 0.01 +0.05 -0.08 0.25 0.365 0.02 9.27 0.51 inches mm ( ) signal conditioning
g m 3 5 8 9 ordering number gm 358 s8 r gamma micro. circuit type package s8: sop-8 d8: dip-8 shipping r: t ape & reel a a m i c r o e l e c t r o n i c s GM358 dual operational amplifier signal conditioning
a a m i c r o e l e c t r o n i c s GM358 dual operational amplifier signal conditioning g m 3 5 8 10
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