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rev.1.0 seiko instruments inc. 1 s-8944xa series mini-analog series cmos single operational amplifier the mini-analog series is a family of standard analog circuits mounted in ultra-small packages. the s-8944xa series is a cmos operational amplifier with a built-in phase compensation circuit. the s-8944xa series is suitable for applications in battery powered compact portable devices due to its lower operation voltage and lower current consumption compared to bipolar operational amplifiers. n features n applications low operation voltage: vdd= 0.9 to 5.5 v cellular phone low current consumption: idd= 0.5 m a (typ) pda wide input/output voltage range: vss to vdd note pc low input offset voltage: 5.0 mv max. digital camera internal phase compensation no external parts digital video camera small package (sc-88a) 2.0 mm 2.1 mm) ? pin assignment ( s-8944xanc ) 5- p in sc-88a to p view vss in ( + ) in ( - ) vdd out 123 54 figure 1 ? package sc-88a (pkg code: np005-b) pin no. symbol functions 1 in(+) non-invert input pin 2 vss gnd pin 3 in( C ) invert input pin 4 out output pin 5 vdd positive power pin
mini-analog series cmos single operational amplifier s-8944xa series rev.1.0 2 seiko instruments inc. n selection guide off-set voltage product name vio = 10 mv max. s-89440ancChbxCtf vio = 5 mv max. s-89441ancChbyCtf n absolute maximum ratings table 1 parameter symbol ratings unit power voltage v dd 7.0 v input voltage v in 0 to 7.0 v differential input voltage v ind 5.5 v allowable loss p d 200 mw operating temperature t opr - 40 to 85 c storage temperature t stg - 55 to + 125 c n recommended operation voltage range table 2 parameter symbol range operation voltage range v ddope 0.9 to 5.5 v
mini-analog series cmos single operational amplifier rev.1.0 s-8944xa series seiko instruments inc. 3 n electrical characteristics a difference between the s-89440anc and s-894411anc is only offset voltage. the other specifications are the same. 1. v dd =3.0 v dc characteristic (v dd =3.0 v) table 3 (ta=25 c unless otherwise specified) item symbol conditions min. typ. max. unit test circuit supply current idd v cm =v out =1.5v ? 0.5 0.9 m a figure 7 offset voltage vio s-89440anc v cm =1.5v ? 510mv figure 3 s-89441anc v cm =1.5v ? 35mv input offset current iio ?? 1 ? pa ? input vias current ibias ?? 1 ? pa ? common mode input voltage vcmr ? 0 ? 3.0 v figure 4 voltage gain (open loop) avol v ss +0.1v v out v dd -0.1v; v cm =1.5v, rl=1m w 70 80 ? db figure 11 maximum output amplitude voh rl=100k w 2.95 ?? v figure 5 voltage vol rl=100k w?? 0.05 v figure 6 common mode input signal cmrr v ss v cm v dd 45 65 ? db figure 4 rejection rate v ss v cm v dd -0.1v 50 65 ? db power supply rejection ratio psrr v dd =0.9 to 5.5v 70 80 ? db figure 2 source current (*1) isource v out =vdd-0.1v 400 500 ?m a figure 8 v out =0v 4800 6000 ?m a sink current isink v out =0.1v 400 550 ?m a figure 9 v out =vdd 4800 6000 ?m a ac characteristic (v dd =3.0 v) table 4 (ta=25 c unless otherwise specified) item symbol conditions min. typ. max. unit test circuit slew rate (*2) sr rl=1.0m w , cl=15pf ? 5.0 ? v/ms figure 10 cut-off frequency (*3) f t cl=0pf ? 4.8 ? khz ? maximum load capacitance (*4) cl ?? 47 ? pf ? (*1) use the device within the range under 7 ma of the source current. (*2)(*3)(*4) 100% inspection is not performed.
mini-analog series cmos single operational amplifier s-8944xa series rev.1.0 4 seiko instruments inc. 2. v dd =1.8 v dc characteristic (v dd =1.8 v) table 5 (ta=25 c unless otherwise specified) item symbol conditions min. typ. max. unit test circuit supply current idd v cm =v out =1.5 v ? 0.5 0.9 m a figure 7 offset voltage vio s-89440anc:v cm =0.9 v ? 510mv figure 3 s-89441anc:v cm =1.5 v ? 35mv input offset current iio ?? 1 ? pa ? input vias current ibias ?? 1 ? pa ? common mode input voltage vcmr ? 0 ? 1.8 v figure 4 voltage gain (open loop) avol v ss +0.1v v out v dd -0.1v; v cm =0.9v, rl=1m w 66 75 db figure 11 maximum output amplitude voh rl=100 k w 1.75 ?? v figure 5 voltage vol rl=100 k w?? 0.05 v figure 6 common mode input signal cmrr v ss v cm v dd 35 55 ? db figure 4 rejection rate v ss v cm v dd -0.3 v 45 60 ? db power supply rejection ratio psrr v dd =0.9 to 5.5 v 70 80 ? db figure 2 source current (*1) isource v out =vdd-0.1 v 220 300 ?m a figure 8 v out =0 v 1200 1800 ?m a sink current isink v out =0.1 v 220 300 ?m a figure 9 v out =vdd 1200 1800 ?m a ac characteristic (v dd =1.8 v) table 6 (ta=25 c unless otherwise specified) item symbol conditions min. typ. max. unit test circuit slew rate (*1) sr rl=1.0m w , cl=15pf ? 4.5 ? v/ms figure 10 cut-off frequency (*2) f t cl=0pf ? 5.0 ? khz ? maximum load capacitance (*3) cl ?? 47 ? pf ? (*1)(*2)(*3) 100% inspection is not performed.
mini-analog series cmos single operational amplifier rev.1.0 s-8944xa series seiko instruments inc. 5 3. v dd =0.9 v dc characteristic (v dd =0.9 v) table 7 (ta=25 c unless otherwise specified) item symbol conditions min. typ. max. unit test circuit supply current idd v cm =v out =0.45 v ? 0.5 0.9 m a figure 7 offset voltage vio s-89440anc:v cm =0.45 v ? 510mv figure 3 s-89441anc:v cm =0.45 v ? 35mv input offset current iio ?? 1 ? pa ? input vias current ibias ?? 1 ? pa ? common mode input voltage vcmr ? 0 ? 0.9 v figure 4 voltage gain (open loop) avol v ss +0.1v v out v dd -0.1v; v cm =0.45v, rl=1m w 60 75 db figure 11 maximum output amplitude voh rl=100 k w 0.85 ?? v figure 5 voltage vol rl=100 k w?? 0.05 v figure 6 common mode input signal cmrr v ss v cm v dd 25 55 ? db figure 4 rejection rate v ss v cm v dd -0.35 v 40 60 ? db power supply rejection ratio psrr v dd =0.9 to 5.5 v 70 80 ? db figure 2 source current (*1) isource v out =vdd-0.1 v 25 65 ?m a figure 8 v out =0 v 40 140 ?m a sink current isink v out =0.1 v 10 65 ?m a figure 9 v out =vdd 12 120 ?m a ac characteristic (v dd =0.9 v) table 8 (ta=25 c unless otherwise specified) item symbol conditions min. typ. max. unit test circuit slew rate (*1) sr rl=1.0m w , cl=15pf ? 4.0 ? v/ms figure 10 cut-off frequency (*2) f t cl=0pf ? 5.0 ? khz ? maximum load capacitance (*3) cl ?? 47 ? pf ? (*1)(*2)(*3) 100% inspection is not performed.
mini-analog series cmos single operational amplifier s-8944xa series rev.1.0 6 seiko instruments inc. n test circuits 1. power supply rejection ratio power supply rejection ratio (psrr) measure v out when power supply voltage is v dd . calculate a power supply rejection ratio (psrr) by the following formula: test conditions: when v dd = 0.9 v; v dd = v dd1 , v out =v out1 when v dd = 5.5 v; v dd = v dd2 , v out =v out2 figure 2 2. off-set voltage off-set voltage (vio) figure 3 r f r s r s r f + - v out v dd 0.45v psrr 20log vv vv rs rr out1 out2 dd1 dd2 f s =- - - + ? ? ? ? r f r s r s r f + - v out v dd v dd / 2 vio vout v 2 rs rr dd fs =- + ? ? ? ?
mini-analog series cmos single operational amplifier rev.1.0 s-8944xa series seiko instruments inc. 7 3. common mode input signal rejection ratio, common mode input voltage common mode input signal rejection ratio (cmrr) measure v out for each v in . calculate a common mode rejection ratio (cmrr) by the following formula: test conditions: when v in = v cmr (max); v in = v in1 , v out =v out1 when v in = v cmr (max); v in = v in2 , v out =v out2 figure 4 common mode input voltage(vcmr) an input voltage range in which v out satisfies the standard for a common mode input signal rejection ratio when changing v in . 4. maximum output amplitude voltage maximum output amplitude voltage (v oh ) test conditions: figure 5 maximum output amplitude voltage (v ol ) test conditions: r l =100k w figure 6 r f r s r s r f + - v out v dd vdd/2 vin () cmrr 20log vv vv rr r in1 in2 out1 out2 fs s = - - + ? ? ? ? v in2 + - v oh v dd / 2 v dd r l v in1 v v 2 -0.1v in1 dd = v v 2 +0.1v in2 dd = r l =100k w v in2 + - v ol v dd / 2 v dd r l v in1 v= v 2 +0.1v in1 dd v= v 2 -0.1v in2 dd
mini-analog series cmos single operational amplifier s-8944xa series rev.1.0 8 seiko instruments inc. 5. supply current supply current (i dd ) figure 7 6. source current source current (i source ) test condition: v out =v dd -0.1v or v out =0v figure 8 7. sink current v in2 + - v out v dd a v in1 figure 9 v in=vdd/2 + - v dd a + - v out v dd v in1 a v in2 v= v 2 -0.1v in1 dd v= v 2 +0.1v in2 dd sink current (i sink ) test condition: v out =0.1v or v out =v dd v= v 2 +0.1v in1 dd v= v 2 -0.1v in2 dd
mini-analog series cmos single operational amplifier rev.1.0 s-8944xa series seiko instruments inc. 9 8. slew rate (sr) vout vout in(+)=vdd in(+)=0v t tlh t thl voh vol t r= t f=1 m s (0v to vdd) risin g : fallin g : voh - vol t thl sr = voh - vol t tlh sr = figure 10 voh=2.7 v (at v dd =3.0 v), 1.62 v (at v dd =1.8 v), 0.81 v (at v dd =0.9 v) vol=0.3 v (at v dd =3.0 v), 0.18 v (at v dd =1.8 v), 0.09 v (at v dd =0.9 v) 9. voltage gain (open loop) voltage gain (open loop) (avol) measure v out for each v m . calculate the voltage gain (avol) by the following fomula: test conditions: when v m = v dd -0.1 v; v m =v m1 v out =v out1 when v m = 0.1 v; v m =v m2 v out =v out2 figure 11 r f r s r s r f + - v dd v dd /2 v dd /2 1m w v dd /2 v m + - null v out nv ss nv dd d.u.t () avol 20log v-v vv rr r m1 m2 out1 out2 fs s = - + ? ? ? ?
mini-analog series cmos single operational amplifier s-8944xa series rev.1.0 10 seiko instruments inc. n typical performance characteristics 1. current consumption vs supply voltage 0.0 0.2 0.4 0.6 0.8 1.0 0123456 v dd (v) i dd ( m a) 25c 85c ta=-40c i dd ? v dd v ss =0 v 2. voltage gain vs frequency 0 20 40 60 80 100 1.e-02 1.e+00 1.e+02 1.e+04 f(hz) gain(db) 25c 85c ta=-40c gain ? f v dd =3v, v ss =0 v 0 20 40 60 80 100 1.e-02 1.e+00 1.e+02 1.e+04 f(hz) gain(db) 25c 85c ta=-40c gain ? f v dd =1.8v, v ss =0 v 0 20 40 60 80 100 1.e-02 1.e+00 1.e+02 1.e+04 f(hz) gain(db) 25c 85c ta=-40c gain ? f v dd =0.9v, v ss =0 v
mini-analog series cmos single operational amplifier rev.1.0 s-8944xa series seiko instruments inc. 11 3. output current 3-1. i source vs supply voltage i sink vs supply voltage 0 500 1000 1500 0123456 v dd (v) i source ( m a) 25c 85c ta=-40c i source ? v dd voh=v dd - 0.1 v 0 500 1000 1500 0123456 v dd (v) i sink ( m a) 25c 85c ta=-40c i sink ? v dd vol=0.1 v 3-2. output voltage (v oh ) vs i source 0.0 0.5 1.0 1.5 2.0 2.5 3.0 0 500 1000 1500 2000 i source ( m a) voh(v) 25c 85c ta=-40c i source ? voh v dd =3.0v, v ss =0v 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 0 500 1000 1500 2000 i source ( m a) voh(v) 25c 85c ta=-40c i source ? voh v dd =1.8v, v ss =0 v 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 0 50 100 150 200 i source ( m a) voh(v) 25c 85c ta=-40c i source ? voh v dd =0.9v, v ss =0 v
mini-analog series cmos single operational amplifier s-8944xa series rev.1.0 12 seiko instruments inc. 3-3. output voltage (v ol ) vsi sink 0.0 0.5 1.0 1.5 2.0 2.5 3.0 0 500 1000 1500 2000 i sink ( m a) vol(v) 25c 85c ta=-40c i sink ? vol v dd =3.0v, v ss =0 v 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 0 500 1000 1500 2000 i sink ( m a) vol(v) 25c 85c ta=-40c i sink ? vol v dd =1.8v, v ss =0 v 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 0 50 100 150 200 i sink ( m a) vol(v) 25c 85c ta=-40c i sink ? vol v dd =0.9v, v ss =0 v
2.00.2 1.30.1 0.2 +0.1 -0.05 0.15 +0.1 -0.05 0.65 0.65 12.5max. 9.00.3 10.50.4 20.2 (60) (60) ?13.00.2 +0 -3 ?60 +1 -0 ?180 sc-88a dimensions np005-b 990929 unit mm taping specifications reel specifications 1 2 3 4 5 3000 pcs./reel. (2.25) 4.00.1 2.00.1 4.00.1 1.550.1 1.750.1 1.050.1 (2.4) 0.20.05 1.10.1 0.3 2.050.1 2.250.1 3.50.1 8.00.2
the information described herein is subject to change without notice. seiko instruments inc. is not responsible for any problems caused by circuits or diagrams described herein whose related industrial properties, patents, or other rights belong to third parties. the application circuit examples explain typical applications of the products, and do not guarantee the success of any specific mass-production design. when the products described herein are regulated products subject to the wassenaar arrangement or other agreements, they may not be exported without authorization from the appropriate governmental authority. use of the information described herein for other purposes and/or reproduction or copying without the express permission of seiko instruments inc. is strictly prohibited. the products described herein cannot be used as part of any device or equipment affecting the human body, such as exercise equipment, medical equipment, security systems, gas equipment, or any apparatus installed in airplanes and other vehicles, without prior written permission of seiko instruments inc. although seiko instruments inc. exerts the greatest possible effort to ensure high quality and reliability, the failure or malfunction of semiconductor products may occur. the user of these products should therefore give thorough consideration to safety design, including redundancy, fire-prevention measures, and malfunction prevention, to prevent any accidents, fires, or community damage that may ensue.

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