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rev.3.0 _00 mini analog series 0.5 a rail-to-rail cmos operational amplifier s-89430a/89431a seiko instruments inc. 1 the mini-analog series is a group of ics that incorporate a general purpose analog circuit in a small package. the s-89430a/89431a is a cmos type operational amplifier that feature rail-to-rail * 1 i/o and an internal phase compensation circuit, and that can be driven at a lower voltage with lower current cons umption than existing bipolar operational amplifiers. these features make this product the ideal solution for small battery-powered portable equipment. these features enable driving at a lower voltage (from 0.9 v) and with lower current consumption (0.5 a) the s-89430a/89431a is a single operational amplifier. *1. rail-to-rail is a register ed trademark of motorola inc. ? features y lower operating voltage than the conventional general-purpose operational amplifiers: v dd = 0.9 to 5.5 v y low current consumption: i dd = 0.5 a y wide i/o voltage range: v cmr = v ss to v dd ( rail-to-rail ) y low input offset voltage: 10.0 mv (max.) (s-89430a) 5.0 mv (max.) (s-89431a) y no external capaciters required for internal phase compensation ? application y cellular phones y pdas y notebook pcs y digital cameras y digital video cameras ? package package name drawing code package tape reel sc-88a np005-b np005-b np005-b
mini analog series 0.5 a rail-to-rail cmos operational amplifier s-89430a/89431a rev.3.0 _00 seiko instruments inc. 2 ? product code list table 1 input offset voltage sc-88a (single) v io = 10 mv s-89430acnc-hbu-tf v io = 5 mv S-89431ACNC-HBV-TF remark delivery form : taping only
mini analog series 0.5 a rail-to-rail cmos operational amplifier rev.3.0 _00 s-89430a/89431a seiko instruments inc. 3 ? pin configuration table 2 pin no. symbol description internal equivalent circuit 1 in( + ) non-inverted input pin figure 3 2 vss gnd pin ? 3 in( ? ) inverted input pin figure 3 4 out output pin figure 2 5 vdd positive power supply pin figure 4 sc-88a top view vdd 5 3 in ( ? ) out 4 2 vss 1 in ( + ) ? + figure 1 ? internal equivalent circuit (1) output pin (2) input pin vdd vss vdd vss figure 2 figure 3 (3) vdd pin vdd vss figure 4
mini analog series 0.5 a rail-to-rail cmos operational amplifier s-89430a/89431a rev.3.0 _00 seiko instruments inc. 4 ? absolute maximum ratings table 3 (ta = 25 c unless otherwise specified) parameter symbol ratings unit power supply voltage v dd v ss 7.0 v input voltage v in v ss to v dd v output voltage v out v ss to v dd v differential input voltage v ind 5.5 v i source output pin current i sink 7.0 ma power dissipation p d 200 mw operating temperature range t opr ? 40 to + 85 c storage temperature range t stg ? 55 to + 125 c caution the absolute maximum ratings are rated values exceeding which the product could suffer physical damage. these values must therefore not be exceeded under any conditions. ? recommended operating voltage range table 4 parameter symbol range unit operating power supply voltage range v dd 0.9 to 5.5 v
mini analog series 0.5 a rail-to-rail cmos operational amplifier rev.3.0 _00 s-89430a/89431a seiko instruments inc. 5 ? electrical characteristics 1. v dd = 3.0 v table 5 dc characteristics (v dd = 3.0 v) (ta = 25 c unless otherwise specified) parameter symbol measurement conditions min. typ. max. unit measurement circuit current consumption *1 i dd v cmr = v out = 1.5 v ? 0.5 0.9 a figure 10 s-89430a : v cmr = 1.5 v ? 10 5 + 10 input offset voltage v io s-89431a : v cmr = 1.5 v ? 5 3 + 5 mv figure 6 input offset current i io ? ? 1 ? pa ? input bias current i bias ? ? 1 ? pa ? common-mode input voltage range v cmr ? 0 ? 3 v figure 7 voltage gain (open loop) a vol v ss + 0.1 v v out v dd ? 0.1 v, v cmr = 1.5 v, r l = 1 m ? 70 80 ? db figure 14 maximum output v oh r l = 100 k ? 2.95 ? ? figure 8 swing voltage v ol r l = 100 k ? ? ? 0.05 v figure 9 common-mode input signal rejection ratio cmrr v ss v cmr v dd 45 65 ? db figure 7 power supply voltage rejection ratio psrr v dd = 0.9 to 5.5 v 70 80 ? db figure 5 v out = v dd ? 0.1 v 400 500 ? source current i source v out = 0 v 4800 6000 ? a figure 11 v out = 0.1 v 400 550 ? sink current i sink v out = v dd 4800 6000 ? a figure 12 *1 when the output is saturated on the v dd side, a current consumption of up to 3 to 5 a may flow. (refer to 4. current consumption vs. common-mode input voltage characteristics graphs in the characteristics data. ) table 6 ac characteristics (v dd = 3.0 v) (ta = 25 c unless otherwise specified) parameter symbol measurement c onditions min. typ. max. unit slew rate sr r l = 1.0 m ?, c l = 15 pf (refer to figure 13. ) ? 5 ? v/ms gain-bandwidth product gbp c l = 0 pf ? 4.8 ? khz maximum load capacitance c l ? ? 47 ? pf
mini analog series 0.5 a rail-to-rail cmos operational amplifier s-89430a/89431a rev.3.0 _00 seiko instruments inc. 6 2. v dd = 1.8 v table 7 dc characteristics (v dd = 1.8 v) (ta = 25 c unless otherwise specified) parameter symbol measurement c onditions min. typ. max. unit measurement circuit current consumption *1 i dd v cmr = v out = 0.9 v ? 0.5 0.9 a figure 10 s-89430a : v cmr = 0.9v ? 10 5 + 10 input offset voltage v io s-89431a : v cmr = 0.9v ? 5 3 + 5 mv figure 6 input offset current i io ? ? 1 ? pa ? input bias current i bias ? ? 1 ? pa ? common-mode input voltage range v cmr ? 0 ? 1.8 v figure 7 voltage gain (open loop) a vol v ss + 0.1 v v out v dd ? 0.1 v, v cmr = 0.9 v, r l = 1 m ? 66 75 ? db figure 14 maximum output v oh r l = 100 k ? 1.75 ? ? figure 8 swing voltage v ol r l = 100 k ? ? ? 0.05 v figure 9 v ss v cmr v dd 35 55 ? common-mode input signal rejection ratio cmrr v ss v cmr v dd ? 0.3 v 45 60 ? db figure 7 power supply voltage rejection ratio psrr v dd = 0.9 to 5.5 v 70 80 ? db figure 5 v out = v dd ? 0.1 v 220 300 ? source current i source v out = 0 v 1200 1800 ? a figure 11 v out = 0.1 v 220 300 ? sink current i sink v out = v dd 1200 1800 ? a figure 12 *1 . when the output is saturated on the v dd side, a current consumption of up to 3 to 5 a may flow. (refer to 4. current consumption vs. common-mode input voltage characteristics graphs in the characteristics data. ) table 8 ac characteristics (v dd = 1.8 v) (ta = 25 c unless otherwise specified) parameter symbol measurement c onditions min. typ. max. unit slew rate sr r l = 1.0 m ?, c l = 15 pf (refer to figure 13. ) ? 4.5 ? v/ms gain-bandwidth product gbp c l = 0 pf ? 5 ? khz maximum load capacitance c l ? ? 47 ? pf
mini analog series 0.5 a rail-to-rail cmos operational amplifier rev.3.0 _00 s-89430a/89431a seiko instruments inc. 7 3. v dd = 0.9 v table 9 dc characteristics (v dd = 0.9 v) (ta = 25 c unless otherwise specified) parameter symbol measurement c onditions min. typ. max. unit measurement circuit current consumption *1 i dd v cmr = v out = 0.45 v ? 0.5 0.9 a figure 10 s-89430a : v cmr = 0.45v ? 10 5 + 10 input offset voltage v io s-89431a : v cmr = 0.45v ? 5 3 + 5 mv figure 6 input offset current i io ? ? 1 ? pa ? input bias current i bias ? ? 1 ? pa ? common-mode input voltage range v cmr ? 0 ? 0.9 v figure 7 voltage gain (open loop) a vol v ss + 0.1 v v out v dd ? 0.1 v, v cmr = 0.45 v, r l = 1 m ? 60 75 ? db figure 14 maximum output v oh r l = 1.00 k ? 0.85 ? ? figure 8 swing voltage v ol r l = 1.00 k ? ? ? 0.05 v figure 9 v ss v cmr v dd 25 55 ? common-mode input signal rejection ratio cmrr v ss v cmr v dd ? 0.35 v 40 60 ? db figure 7 power supply voltage rejection ratio psrr v dd = 0.9 to 5.5 v 70 80 ? db figure 5 v out = v dd ? 0.1 v 25 65 ? source current i source v out = 0 v 40 140 ? a figure 11 v out = 0.1 v 10 65 ? sink current i sink v out = v dd 12 120 ? a figure 12 *1 when the output is saturated on the v dd side, a current consumption of up to 3 to 5 a may flow. (refer to 4. current consumption vs. common-mode input voltage characteristics graphs in the characteristics data.) table 10 ac characteristics (v dd = 0.9 v) (ta = 25 c unless otherwise specified) parameter symbol measurement c onditions min. typ. max. unit slew rate sr r l = 1.0 m ?, c l = 15 pf (refer to figure 13. ) ? 4 ? v/ms gain-bandwidth product gbp c l = 0 pf ? 5 ? khz maximum load capacitance c l ? ? 47 ? pf
mini analog series 0.5 a rail-to-rail cmos operational amplifier s-89430a/89431a rev.3.0 _00 seiko instruments inc. 8 ? measurement circuit 1. power supply voltage rejection ratio r f r s r s r f + ? v out v dd 0.45v y power supply voltage rejection ratio (psrr) the power supply voltage rejection ratio (psrr) can be calculated by the following expression, with v out measured at each v dd . measurement 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 psrr = 20log v dd1 ? v dd2 r f + r s r s v out1 ? v out2 figure 5 2. input offset voltage r f r s r s r f + ? v out v dd v cmr = v dd / 2 y input offset voltage (v io ) vv v 2 r rr io out dd s fs =? + ? ? ? ? ? ? figure 6
mini analog series 0.5 a rail-to-rail cmos operational amplifier rev.3.0 _00 s-89430a/89431a seiko instruments inc. 9 3. common-mode input signal rejection ratio, common-mode input voltage range r f r s r s r f + ? v out v dd v in v dd / 2 y common-mode input signal rejection ratio (cmrr) the common-mode input signal rejection ratio (cmrr) can be calculated by the following expression, with v out measured at each v in . measurement conditions: when v in = v cmr (max.): v in = v in1 , v out = v out1 when v in = v cmr (min.): v in = v in2 , v out = v out2 cmrr = 20log v in1 ? v in2 r f + r s r s v out1 ? v out2 y common-mode input voltage range (v cmr ) the common-mode input voltage range is the range of v in in which v out satisfies the common-mode input signal rejection ratio specifications. figure 7 4.maximum output swing voltage + ? v oh v dd v in1 v in2 r l v dd /2 y maximum output swing voltage (v oh ) measurement conditions: v 0.1 2 v v dd in1 ? = 0.1v 2 v v dd in2 + = r l = 100 k ? figure 8 + ? v ol v dd v in1 v in2 r l v dd /2 y maximum output swing voltage (v ol ) measurement conditions: v 0.1 2 v v dd in1 + = v 0.1 2 v v dd in2 ? = r l = 100 k ? figure 9
mini analog series 0.5 a rail-to-rail cmos operational amplifier s-89430a/89431a rev.3.0 _00 seiko instruments inc. 10 5. current consumption v dd v cmr = v dd / 2 a + ? y current consumption (i dd ) figure 10 6. source current + ? v dd v in1 v in2 a v out y source current (i source ) measurement conditions : v out = v dd ? 0.1 v or v out = 0 v v 0.1 2 v v dd in1 ? = v 0.1 2 v v dd in2 + = figure 11 7. sink current + ? v dd v in1 v in2 a v out y sink current (i sink ) measurement conditions : v out = 0.1 v or v out = v dd v 0.1 2 v v dd in1 + = v 0.1 2 v v dd in2 ? = figure 12
mini analog series 0.5 a rail-to-rail cmos operational amplifier rev.3.0 _00 s-89430a/89431a seiko instruments inc. 11 8. slew rate (sr): measured by the voltage follower circuit v out in ( + ) = v dd in ( + ) = 0 v t thl v oh t r = t f = 1 s (0 v v dd ) t tlh v out v ol when rising tlh ol oh t v v sr ? = when falling thl ol oh t v v sr ? = figure 13 when v dd = 3.0 v when v dd = 1.8 v when v dd = 0.9 v v oh 2.7 v 1.62 v 0.81 v v ol 0.3 v 0.18 v 0.09 v 9. voltage gain (open loop) r f r s r s r f + ? v cmr = v dd / 2 1 m ? v out v m v dd / 2 v dd ? + v ddn v ssn null d.u.t figure 14 ? voltage gain (open loop) (a vol ) the voltage gain (a vol ) can be calculated by the following formula, with the value of v out mea sured at each v m . measurement 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 ? ? ? ? ? ? + ? ? = s s f out2 out1 m2 m1 vol r r r v v v v 20log a
mini analog series 0.5 a rail-to-rail cmos operational amplifier s-89430a/89431a rev.3.0 _00 seiko instruments inc. 12 ? precaution ? note that when the output is saturated on the v dd side, a power supply current of up to 3 to 5 a may flow. (refer to 4. current consumption vs. common-mode input voltage characteristics graphs in the characteristics data) ? do not apply an electrostatic discharge to this ic that exceeds performance ratings of the built-in electrostatic protection circuit. ? be sure to use the product with an output current of no more than 7 ma. ? sii claims no responsibility for any disputes arisi ng out of or in connection with any infringement by products including this ic of patents owned by a third party.
mini analog series 0.5 a rail-to-rail cmos operational amplifier rev.3.0 _00 s-89430a/89431a seiko instruments inc. 13 ? characteristics (reference data) 1. current consumption vs. power supply voltage 0.0 0.2 0.4 0.6 0.8 1.0 0 1 2 3 4 5 6 v dd (v) i dd ( a) 25c ta=-40c 85c i dd ? v v ss = 0 v, v cmr = v out = 2 v dd 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 v dd =3 v , 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 v dd =1.8 v, 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 v dd =0.9 v, v ss =0 v
mini analog series 0.5 a rail-to-rail cmos operational amplifier s-89430a/89431a rev.3.0 _00 seiko instruments inc. 14 3. output current 3-1. i source vs. power supply voltage 0 500 1000 1500 0 1 2 3 4 5 6 v dd (v) i source ( a) 25c 85c ta=-40c v oh = v dd ? 0.1 v 3-2. i sink vs. power supply voltage 0 500 1000 1500 0 1 2 3 4 5 6 v dd (v) i sink ( a) 25c 85c ta=-40c v ol = 0.1 v
mini analog series 0.5 a rail-to-rail cmos operational amplifier rev.3.0 _00 s-89430a/89431a seiko instruments inc. 15 3-3. 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 ( a) v oh (v) 25c 85c ta=-40c v dd = 3.0 v, 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 source ( a) v oh (v) 25c 85c ta=-40c v dd = 1.8 v, 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 ( a) v oh (v) 25c 85c ta=-40c v dd = 0.9 v, v ss = 0 v
mini analog series 0.5 a rail-to-rail cmos operational amplifier s-89430a/89431a rev.3.0 _00 seiko instruments inc. 16 3-4. output voltage (v ol ) vs. i sink 0.0 0.5 1.0 1.5 2.0 2.5 3.0 0 500 1000 1500 2000 i sink ( a) v ol (v) 25c 85c ta=-40c v dd = 3.0 v, 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 ( a) v ol (v) 25c 85c ta=-40c v dd = 1.8 v, 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 ( a) v ol (v) 25c 85c ta=-40c v dd = 0.9 v, v ss = 0 v 4. current consumption vs. common-mode input voltage (voltage follower configuration) 0 2 4 6 8 10 12 14 16 18 20 -0.5 0 0.5 1 1.5 2 2.5 3 3.5 v cmr (v) i dd ( a ) 25c 85c ta=-40c v dd = 3.0 v , v ss = 0 v

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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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