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ap358 low power dual operational amplifiers this datasheet contains new product information. anachip corp. re serves the rights to modify the product specification without notice. no liability is assumed as a result of the use of this product. no rights under any patent accompany the sale of the product. rev. 1.0 jul 15, 2004 1/13 ? features - internally frequency compensated for unity gain - large dc voltage gain: 100 db - very low supply current drain (500a)-essentially independent of supply voltage - wide bandwidth (unity gain): 1 mhz (temperature compensated) - input common-mode voltage range includes ground - differential input voltage range equal to the power supply voltage - low input offset voltage: 2mv - wide power supply range: single supply: 3v to 32v or dual supplies: 1.5v to 16v - large output voltage swing: 0v to v + - 1.5v - 8-pin pdip and sop pb-free packages ? advantages - eliminates need for dual supplies - compatible with all forms of logic - two internally compensated op amps - power drain suitable for battery operation - allows direct sensing near gnd and v out also goes to gnd ? unique characteristics -in the linear mode the input common-mode voltage range includes ground and the output voltage can also swing to ground, even though operated from only a single power supply voltage. -the unity gain cross frequency is temperature compensated. -the input bias current is also temperature compensated. ? general description the ap358 series consists of two independent, high gain, internally frequency compensated operational amplifiers which were designed specifically to operate from a single power supply over a wide range of voltages. operation from split power supplies is also possible and the low power supply current drain is independent of the magnitude of the power supply voltage. application areas include transducer amplifiers, dc gain blocks and all the conventional op amp circuits which now can be more easily implemented in single power supply systems. for example, the ap358 series can be directly operated off of the standard +5v power supply voltage which is used in digital systems and will easily provide the required interface electronics without requiring the additional 15v power supplies. ? pin descriptions pin name pin # description output 1 1 channel 1 output inverting input 1 2 channel 1 inverting input non-invert ing input 1 3 channel 1 non-inverting input gnd 4 ground non-invert ing input 2 5 channel 2 non-inverting input inverting input 2 6 channel 2 inverting input output 2 7 channel 2 output v + 8 chip supply voltage ? pin assignment sop-8l/pdip-8l 1 2 3 45 6 7 8 (top view) inverting input 1 gnd ap358 non-inverting input 1 output 2 output 1 v + inverting input 2 non-inverting input 2
ap358 low power dual operational amplifiers anachip corp. www.anachip.com.tw rev. 1.0 j ul 15, 2004 2/13 ? ordering information ap358 x x package packing n: pdip-8l s: sop-8l blank: tube a : taping ? block diagram inverting input 1 gnd non-inverting input 1 output 2 output 1 inverting input 2 non-inverting input 2 1 2 3 4 5 6 7 8 ab + -+- v + ? voltage controlled oscillator (vco) + - + - output2 output1 0.05f +v c * v + /2 1/2 ap358 1/2 ap358 51k 51k r/2 51k r 100k 51k 10k 100k
ap358 low power dual operational amplifiers anachip corp. www.anachip.com.tw rev. 1.0 j ul 15, 2004 3/13 ? absolute maximu m ratings symbol parameter rating unit v cc supply voltage 32 v differential input voltage 32 v v in input voltage -0.3 to +32 v molded dip 830 p d power dissipation (note1) small outline package (m) 530 mw v + < 15v and t a =25 o c continuous output short-circuit to gnd (one amplifier) (note 2) input current (v in < -0.3v) (note 3) 40 ma t op operating temperature range 0 to +70 o c t st storage temperature range -65 to +150 o c ? electrical characteristics (t a =25 o c, v + =+5.0v, unless otherwise stated) (note 4) symbol parameter conditions min. typ. max. unit v io input offset voltage (note 5) , t a =25 o c - 2 7 mv i b input bias current i in(+) or i in( ? ) , t a =25c, v cm =0v, (note6) - 45 250 na i io input offset current i in(+) - i in( ? ) ,v cm =0v, t a =25c - 5 50 na v icm input common-mode voltage range v + =30v, (note 7) t a =25c 0 - v + -1.5 v v + =30v - 1 2 i s supply current over full temperature range r l = on all op amps v + =5v - 0.5 1.2 ma a v large signal voltage gain v + =15v, t a =25c, r l > 2k ? , (for v o =1v to 11v) 25 100 - v/mv cmrr common-mode rejection ratio t a =25c, v cm =0v to v + -1.5v 65 85 - db psrr power supply rejection ratio v + =5v to 30v, t a =25c 65 100 - db amplifier-to-amplifier coupling f=1khz to 20 khz, t a =25c (input referred), (note 8) - -120 - db
ap358 low power dual operational amplifiers anachip corp. www.anachip.com.tw rev. 1.0 j ul 15, 2004 4/13 ? electrical characteristics (v + =+5.0v, unless otherwise stated) (note 4) symbol parameter conditions min. typ. max. unit v in - =1v, v in + =0v, v + =15v, v o =2v, t a =25c 10 20 - ma i sink sink v in - =1v, v in + =0v, v + =15v, v o =200mv, t a =25c 20 70 - a i source output current source v in + =1v, v in - =0v, v + =15v, v o =2v, t a =25c 20 40 - ma i sc short circuit to ground t a =25c, (note 2) v + =15v - 40 60 ma r l =2k ? , t a =25 o c 26 - - v v oh (v + =30v) r l =10k ? , t a =25 o c 27 28 - v v ol output voltage swing (v + =5v) r l =10k ? , t a =25 o c - 5 20 mv note 1: for operating at high temperatures, the ap358 must be derated based on a +125c maximum junction temperature and a thermal resistance of 120c/w for dip and 189c/w for small outline package, which applies for the device soldered in a printed circuit board, operating in a still air ambient. the dissipation is the total of both amplifiers?use external resistors , where possible, to allow the amplifier to saturate or to reduce the power which is dissipated in the integrated circuit. note 2: short circuits from the output to v + can cause excessive heating and eventual destruction. when considering short cirucits to ground, the maximum output current is approximately 40ma independent of the magnitude of v + . at values of supply voltage in excess of +15v, continuous short-circuits can exceed the power dissipation ratings and cause eventual destruction. destructive dissipation can result from simultaneous shorts on all amplifiers. note 3: this input current will only exist when the voltage at any of the input leads is driven negative. it is due to the collector-ba se junction of the input pnp transistors becoming forward biased and thereby acting as input diode clamps. in addition to this diode action, there is also lateral npn parasitic transistor action on the ic chip. this transistor action can cause the output voltages of the op amps to go to the v + voltage level (or to ground for a large overdrive) for the time duration that an input is driven negative. this is not destructive and normal output states will re-establish when the input voltage, which was negative, again returns to a value greater than -0.3v (at 25c). note 4: the ap358 temperature specifications are limited to 0c < t a < +70c. note 5: v o ? 1.4v, r s = 0 ? with v + from 5v to 30v; and over the full input common-mode range (0v to v + -1.5v) at 25c. note 6: the direction of the input current is out of the ic due to the pnp input stage. this current is essentially constant, independe nt of the state of the output so no loading change exists on the input lines. note 7: the input common-mode voltage of either input signal voltage should not be allowed to go negative by more than 0.3v (at 25c). the upper end of the common-mode voltage range is v + -1.5v (at 25c), but either or both inputs can go to +32v without damage, independent of the magnitude of v + . note 8: due to proximity of external components, insure that coupling is not originating via stray capacitance between these external parts. this typically can be detected as this type of capacitance increases at higher frequencies.
ap358 low power dual operational amplifiers anachip corp. www.anachip.com.tw rev. 1.0 j ul 15, 2004 5/13 ? typical single-supply circuit (v + = 5.0 v dc ) non-inverting dc gain (0v output) + - +v o r2 1m r1 10k 1/2 ap358 +v in * *r not needed due to temperature independent i in v o (volts) v in (mv) gain=1+ =101(as shown) r2 r1 +5v dc summing amplifier (v in's > 0 v dc and v o > 0 v dc ) + - r 100k r 100k r 100k r 100k +v 1 +v 2 +v 3 +v 4 r 100k r 100k 1/2 ap358 v o where: v o =v 1 +v 2 -v 3 -v 4 (v 1 +v 2 ) > (v 3 +v 4 ) to keep v o > 0 v dc + - v o v + r1 910k r2 100k r3 91k r l +v in 1/2 ap358 power amplifier v o =0 v dc for v in = 0 v dc a v =10 + - + - + - v + c2 330pf "bi-quad" rc active bandpass filter r1 100k 1/2 ap358 1/2 ap358 1/2 ap358 r2 100k r3 100k r4 10m r5 470k r6 100k r8 100k r7 470k c1 330pf c3 10f + v o v in f o = 1khz q = 50
ap358 low power dual operational amplifiers anachip corp. www.anachip.com.tw rev. 1.0 j ul 15, 2004 6/13 ? typical single-supply circuit (v + = 5.0 v dc ) + - 1ma v + 2v r1 2k i 1 1/2 ap358 fixed current sources + - 2v + - r4 2k r3 2k r2 3k i 2 i 1 = i 2 - + r2 100 r1* 0.1 r3 1k v o r l i l v l 1/2 ap358 current monitor v o = 1v(i l ) 0.1a *(increase r1 for i l small) v l < v+ -2v led driver 82 + - 1/2 ap358 20ma lamp driver v + 100 > 20 + - 1/2 ap358 30ma 600ma driving ttl + - r l 240 1/2 ap358 voltage follower + - 1/2 ap358 v o +v in v o = v in pulse generator + - v o 100k v + 1m r2 r1 in914 in914 0.001f 1/2 ap358 r3 100k r4 100k r5 100k + 0 s q uarewave oscillato r v o 100k v + r1 c 0.001f r2 100k r3 100k r4 100k + 0 + - 1/2 ap358
ap358 low power dual operational amplifiers anachip corp. www.anachip.com.tw rev. 1.0 j ul 15, 2004 7/13 ? typical single-supply circuit (v + = 5.0 v dc ) + - 1/2 ap358 + - 1/2 ap358 + - 1/2 ap358 +v in c 1f 2n929* *hi at 100 na 2i b r im i b 3r 3m 0.001f i b 2i b i b i b z in (polycarbonate or polyethylene) high z in low z out v o z out aux amp input current compensation low drift peak detecto r pulse generator + - v o 30k v + r1 0.01f 1/2 ap358 r3 100k r4 100k r5 100k + 0 in914 r2 150k high compliance current sink - + 1/2 ap358 +v in r l 10 i o i o =0.1 amp / volt v in (increase r e for i o small) + - 1/2 ap358 + - 1/2 ap358 0.05f +v c * output1 voltage controlled oscillator (vco) 51k 51k r/2 50k r 100k 10k 100k v + /2 51k output2 *wide control voltage range: 0 v dc < v c < 2 (v + -1.5v dc )
ap358 low power dual operational amplifiers anachip corp. www.anachip.com.tw rev. 1.0 j ul 15, 2004 8/13 ? typical single-supply circuit (v + = 5.0 v dc ) + - v o r2 10m +v in 1/2 ap358 comparator with hysteresis +v ref r1 10k ac coupled inverting amplifier + - 1/2 ap358 r1 10k v in + c in r f 10k r2 100k r3 100k c1 10f + r b 6.2k r l 10k c o v o 03 vpp av= (as shown, a v =10) r f r1 v + + - v o r4 1m +v cm 1/2 ap358 ground referencing a differential input signal v r r1 1m r2 1m r3 1m r + - v o =v r ac coupled non-inverting amplifier + - 1/2 ap358 v in + c in r1 100k c1 0.1f + r b 6.2k r l 10k c o v o 03 vpp r2 1m r3 1m c2 10f r4 100k r5 100k v + a v =1+ r2 r1 a v =11(as shown) + - v o r4 100k v in 1/2 ap358 dc coupled low-pass rc active filter r1 16k r2 16k c1 0.01f c2 0.01f r3 100k v o f o 0 f o = 1khz q = 1 a v =2 high input z, dc di fferential amplifier + - 1/2 ap358 v o + - 1/2 ap358 r3 100k r4 100k r2 100k r1 100k +v 1 +v 2 r1 r2 r4 r3 for = (cmrr depends on this resistor ratio match) v o = (1+ )(v 2 -v 1 ) r4 r3 as shown: v o = 2(v 2 -v 1 )
ap358 low power dual operational amplifiers anachip corp. www.anachip.com.tw rev. 1.0 j ul 15, 2004 9/13 ? typical single-supply circuit (v + = 5.0 v dc ) bandpass active filter + - 1/2 ap358 r1 390k v in c1 0.01f + v o v + + - 1/2 ap358 c2 0.01f c3 10f r2 620k r3 680 r4 390k r5 39k r6 120k r7 100k r8 100k f o = 1.12khz q = 25 + - 1/2 ap358 + - 1/2 ap358 + - 1/2 ap358 +v 1 +v 2 r1 2k gain adjust r2 100k r3 100k r4 100k r5 100k r6 100k r7 100k v o as shown: v o = 101(v 2 -v 1 ) v o =( 1+ )(v 2 -v 1 ) 2r 2 r 1 if r1 = r5 & r3 = r4 = r6 = r7 (cmrr depends on match) high input z adjustable-gain dc instrumentation amplifier + - 1/2 ap358 + - 1/2 ap358 +v in +v o i in i b i b i b i b 0.001f i b r 1.5m 2r 3m aux amp input current compensation using symmetrical amplifiers to reduce input current (general concept) 2n929* *hi at 50 na
ap358 low power dual operational amplifiers anachip corp. www.anachip.com.tw rev. 1.0 j ul 15, 2004 10/13 ? typical characteristics (at t a =25 o c) supply current 0 0.2 0.4 0.6 0.8 1 1.2 1.4 5v 10v 15v 20v 25v 30v 35v supply current drain (ma) supply voltage (v) - + ma v + i d large signal frequency response 0 2 4 6 8 10 12 14 1k 10k 25k 50k 75k 100k 500k 1m input frequency (hz) vo - output voltage (vp-p) - + 1k v o 100k +7v dc +15 v dc 2k open loop frequency response 0 20 40 60 80 100 120 1 10 10 0 1 k 1 0k 10 0 k 30 0 k 500k 1m input frequency (hz) voltage gain (db) v + =30v v + =15v - + v + 0.1 v o 10m v + /2 v in f current limit 0 10 20 30 40 50 60 -40 0 25 41 60 80 100 125 iout - current drain(ma) temperature ( o c) - + i o + voltage follower pulse response voltage follower pulse response (small signal) t a =25 o c r l > 2.0k v + = 15v dc - + e o 50pf e in t a = +25 o c v + = +30v dc
ap358 low power dual operational amplifiers anachip corp. www.anachip.com.tw rev. 1.0 j ul 15, 2004 11/13 ? application inf ormation the ap358 series are op amps which operate with only a single power supply voltage, have true-differential inputs, and remain in the linear mode with an input common-mode voltage of 0 v dc . these amplifiers operate over a wide range of power supply voltage with little change in performance characteristics. at 25c amplifier operation is possible down to a minimum supply voltage of 2.3 v dc . precautions should be taken to insure that the power supply for the integrated circuit never becomes reversed in polarity or that the unit is not inadvertently installed backwards in a test socket as an unlimited current surge through the resulting forward diode within the ic could cause fusing of the internal conductors and result in a destroyed unit. large differential input voltages can be easily accommodated and, as input differential voltage protection diodes are not needed, no large input currents result from large differential input voltages. the differential input voltage may be larger than v + without damaging the device. protection should be provided to prevent the input voltages from going negative more than -0.3 v dc (at 25c). an input clamp diode with a resistor to the ic input terminal can be used. to reduce the power supply current drain, the amplifiers have a class a output stage for small signal levels which converts to class b in a large signal mode. this allows the amplifiers to both source and sink large output currents. therefore both npn and pnp external current boost transistors can be used to extend the power capability of the basic amplifiers. the output voltage needs to raise approximately 1 diode drop above ground to bias the on-chip vertical pnp transistor for output current sinking applications. for ac applications, where the load is capacitively coupled to the output of the amplifier, a resistor should be used, from the output of the amplifier to ground to increase the class a bias current and prevent crossover distortion. where the load is directly coupled, as in dc applications, there is no crossover distortion. capacitive loads which are applied directly to the output of the amplifier reduce the loop stability margin. values of 50pf can be accomodated using the worst-case non-inverting unity gain connection. large closed loop gains or resistive isolation should be used if larger load capacitance must be driven by the amplifier. the bias network of the ap358 establishes a drain current which is independent of the magnitude of the power supply voltage over the range of 3 v dc to 30 v dc . output short circuits either to ground or to the positive power supply should be of short time duration. units can be destroyed, not as a result of the short circuit current causing metal fusing, but rather due to the large increase in ic chip dissipation which will cause eventual failure due to excessive function temperatures. putting direct short-circuits on more than one amplifier at a time will increase the total ic power dissipation to destructive levels, if not properly protected with external dissipation limiting resistors in series with the output leads of the amplifiers. the larger value of output source current which is available at 25c provides a larger output current capability at elevated temperatures (see typical performance characteristics) than a standard ic op amp. the circuits presented in the section on typical applications emphasize operation on only a single power supply voltage. if complementary power supplies are available, all of the standard op amp circuits can be used. in general, introducing a pseudo-ground (a bias voltage reference of v + /2) will allow operation above and below this value in single power supply systems. many application circuits are shown which take advantage of the wide input common-mode voltage range which includes ground. in most cases, input biasing is not required and input voltages which range to ground can easily be accommodated.
ap358 low power dual operational amplifiers anachip corp. www.anachip.com.tw rev. 1.0 j ul 15, 2004 12/13 ? marking information (top view) sop-8l/pdip-8l ac ap358 yy ww x logo part no. id code: internal year: "01" =2001 "02" =2002 xth week: 01~52 ~ 5 8 4 1 ? package information (1) pdip-8l (plastic dual-in-line package ) e1 d 7 (4x) a l a2 a1 b2 b1 b e s 15 (4x) e c eb e-pin o0.118 inch pin #1 indent o0.025 deep 0.006-0.008 inch dimensions in millimeters dimensions in inches symbol min. nom. max. min. nom. max. a - - 5.33 - - 0.210 a1 0.38 - - 0.015 - - a2 3.1 3.30 3.5 0.122 0.130 0.138 b 0.36 0.46 0.56 0.014 0.018 0.022 b1 1.4 1.52 1.65 0.055 0.060 0.065 b2 0.81 0.99 1.14 0.032 0.039 0.045 c 0.20 0.25 0.36 0.008 0.010 0.014 d 9.02 9.27 9.53 0.355 0.365 0.375 e 7.62 7.94 8.26 0.300 0.313 0.325 e1 6.15 6.35 6.55 0.242 0.250 0.258 e - 2.54 - - 0.100 - l 2.92 3.3 3.81 0.115 0.130 0.150 eb 8.38 8.89 9.40 0.330 0.350 0.370 s 0.71 0.84 0.97 0.028 0.033 0.038
ap358 low power dual operational amplifiers anachip corp. www.anachip.com.tw rev. 1.0 j ul 15, 2004 13/13 ? package information (continued) (2) sop- 8l(jedec small outline package) view "a" l c view "a" h e a a2 a1 b e d 7 (4x) 0.015x45 7 (4x) y dimensions in millimeters dimensions in inches symbol min. nom. max. min. nom. max. a 1.40 1.60 1.75 0.055 0.063 0.069 a1 0.10 - 0.25 0.040 - 0.100 a2 1.30 1.45 1. 50 0.051 0.057 0.059 b 0.33 0.41 0.51 0.013 0.016 0.020 c 0.19 0.20 0.25 0.0075 0.008 0.010 d 4.80 5.05 5.30 0.189 0.199 0.209 e 3.70 3.90 4.10 0.146 0.154 0.161 e - 1.27 - - 0.050 - h 5.79 5.99 6.20 0.228 0.236 0.244 l 0.38 0.71 1.27 0.015 0.028 0.050 y - - 0.10 - - 0.004 0 o - 8 o 0 o - 8 o

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