PRECISION MICROPOWER CMOS OPERATIONAL AMPLIFIER

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1 TM DVNCD INR DVICS, INC. PD D1721/D1721G N B D PRCISION MICROPOWR CMOS OPRTION MPIFIR GNR DSCRIPTION Th D1721/D1721G is a monolithic CMOS micropowr high slw rat oprational amplifir intndd for a road rang of prcision applications rquiring xrmly low input signal powr. Input signal powr is th product of input offst voltag and input ias currnt, which rprsnts th minimum rquird powr draw from th signal sourc in ordr to driv th input of th oprational amplifir. Input signal powr is also a figur of mrit in sourc loading and its associatd rror, and is a masur of th asic signal rsolution possil through th oprational amplifir for a givn signal sourc. For crtain typs of signal sourcs, signal loading dirctly translats into a significant distortion or "intrfac nois quivalnt" trm. Th D1721/D1721G is dsignd to st a nw standard in low input signal powr rquirmnts. Th typical input loading at its input is 0.05 mv offst voltag and 0.01 p input ias currnt at 25C, rsulting in fw input signal powr draw. This input charactristic virtually liminats any loading ffcts on most typs of signal sourcs, offring unparalld accuracy and signal intgrity and fidlity. Oviously, for capacitiv and high snsitivity, high impdanc signal sourcs, th D1721/ D1721G is idally suitd. It is radily suitd for 5V singl supply (or ±1V to ±5V) systms, with low oprating powr dissipation, a traditional strngth of CMOS tchnology. It is offrd with industry standard pin configuration of µ741 and IC7611 typs. Th D1721/D1721G can oprat with rail to rail larg signal input and output voltags with rlativly high slw rat. Th input voltag can qual to or xcd th positiv and ngativ supply voltags whil th output voltag can swing clos to ths supply voltag rails. This fatur significantly rducs th supply ovrhad voltag rquird to oprat th oprational amplifir and allows numrous analog srial stags to oprat in a low powr supply nvironmnt. In addition, th dvic can accommodat mixd applications whr digital and analog circuits may oprat off th sam powr supply or attry. Finally, th output stag can typically driv up to 50pF capacitiv and 10KΩ rsistiv loads. Ths faturs mak th D1721/D1721G a vrsatil, micropowr high prcision oprational amplifir that is usr frindly and asy to us with virtually no sourc loading and zro inputloading inducd sourc rrors. dditionally, roust dsign and rigorous scrning mak this dvic spcially suital for opration in tmpraturxtrm nvironmnts and ruggd conditions. FTURS & BNFITS ad Fr RoHS compatil Roust hightmpratur opration Guarantd xtrmly low input signal powr of 1.5 fw Input offst voltag of 0.05 mv typical (0.15 mv max.) ow input ias currnts of 0.01p typical (10p max.) Rail to rail input and output voltag rangs ll paramtrs spcifid for 5V singl supply or ±2.5V dual supplis Unity gain stal, no compnsation ndd High voltag gain typically ±2.5V(dB) Driv as low as 10KΩ load Output short circuit protctd Unity gain andwidth of 0.7MHz Slw rat of 0.7V/µs Micro powr dissipation Suital for ruggd, tmpraturxtrm nvironmnts PPICTIONS Voltag amplifir Voltag followr/uffr Charg intgrator Photodiod amplifir Data acquisition systms High prformanc portal instrumnts Signal conditioning circuits Snsor and transducr amplifirs ow lakag amplifirs ctiv filtrs Sampl/Hold amplifir Picoammtr Currnt to voltag convrtr PIN CONFIGURTION ORDRING INFORMTION ( suffix dnots ladfr (RoHS)) Oprating Tmpratur Rang C to 7C C to 7C 55 C to 125 C 8Pin 8Pin 8Pin Small Outlin Plastic Dip CRDIP Packag (SOIC) Packag Packag D1721S D1721P D1721D D1721GS D1721GP D1721GD * Contact factory for ladd (nonrohs) or high tmpratur vrsions. N/C IN IN V TOP VIW S, P, D PCKGS * N/C pins ar intrnally connctd. Do not connct xtrnally N/C V OUT N/C Rv dvancd inar Dvics, Inc. 415 Tasman Driv, Sunnyval, C Tl: (408) Fax: (408)

2 BSOUT MXIMUM RTINGS Supply voltag, V 10.6V Diffrntial input voltag rang 0.3V to V 0.3V Powr dissipation 600 mw Oprating tmpratur rang S, P packags C to 7C D packag 55 C to 125 C Storag tmpratur rang 65 C to 15C ad tmpratur, 10 sconds 26C CUTION: SD Snsitiv Dvic. Us static control procdurs in SD controlld nvironmnt. OPRTING CTRIC CHRCTRISTICS unlss othrwis spcifid G Tst Paramtr Symol Min Typ Max Min Typ Max Unit Conditions Supply V S ±1.0 ±5.0 ±1.0 ±5.0 Dual Supply Voltag V V Singl Supply Input Offst V OS mv R S KΩ Voltag mv C T 7C Input Offst I OS p Currnt p C T 7C Input Bias I B p Currnt p C T 7C Input Voltag V IR V V = 5V Rang V Input R IN Ω Rsistanc Input Offst TCV OS 5 7 µv/ C R S KΩ Voltag Drift Powr Supply PSRR db R S KΩ Rjction Ratio db C T 7C Common Mod CMRR db R S KΩ Rjction Ratio db C T 7C arg Signal V V/ mv Voltag Gain 0 0 V/ mv R 1MΩ V/ mv C T 7C Output VO low V R =1MΩ V = 5V Voltag VO high V C T 7C Rang VO low V R =KΩ VO high V C T 7C Output Short I SC 1 1 m Circuit Currnt Supply Currnt I S µ V IN = 0V No oad Powr P D mw Dissipation D1721/D1721G dvancd inar Dvics 2 of 9

3 OPRTING CTRIC CHRCTRISTICS (cont'd) unlss othrwis spcifid (cont'd) G Tst Paramtr Symol Min Typ Max Min Typ Max Unit Conditions Input C IN 1 1 pf Capacitanc Bandwidth B W KHz Slw Rat S R V/µs V = 1 Ris tim t r µs Ovrshoot % R =KΩ Factor C = 50pF Sttling Tim t s µs 0.1% V S = ±5.0V unlss othrwis spcifid V = 1R =KΩ C = 50pF G Tst Paramtr Symol Min Typ Max Min Typ Max Unit Conditions Powr Supply PSRR db R S KΩ Rjction Ratio Common Mod CMRR db R S KΩ Rjction Ratio arg Signal V V/mV R =KΩ Voltag Gain Output Voltag V O low V R =KΩ Rang V O high V Bandwidth B W MHz Slw Rat S R V/µs V = 1 C = 50pF 55 C T 125 C unlss othrwis spcifid G Tst Paramtr Symol Min Typ Max Min Typ Max Unit Conditions Input Offst V OS mv R S KΩ Voltag Input Offst I OS n Currnt Input Bias I B n Currnt Powr Supply PSRR db R S KΩ Rjction Ratio Common Mod CMRR db R S KΩ Rjction Ratio arg Signal V V/ mv Voltag Gain Output Voltag V O low V Rang V O high V D1721/D1721G dvancd inar Dvics 3 of 9

4 Dsign & Oprating Nots: 1. Th D1721/D1721G CMOS oprational amplifir uss a 3 gain stag architctur and an improvd frquncy compnsation schm to achiv larg voltag gain, high output driving capaility, and ttr frquncy staility. Th D1721/D1721G is intrnally compnsatd for unity gain staility. This compnsation producs a clan singl pol roll off in th gain charactristics whil providing for mor than 70 dgrs of phas margin at th unity gain frquncy, rducing or liminating low lvls of oscillation or ringing with many typs of loading conditions. 2. Th D1721/D1721G has complmntary pchannl and n channl input diffrntial stags connctd in paralll to accomplish rail to rail input common mod voltag rang. With diffrnt rangs of common mod input voltag, on or oth of th two diffrntial stags is activ. Th transition twn th two input stags taks plac at aout 1.5V low th positiv supply voltag. Input offst voltag trimming on th D1721/D1721G is mad whn th input voltag is symmtrical to th supply voltags, this intrnal transition switching dos not affct a varity of applications such as an invrting amplifir or noninvrting amplifir with a gain largr than 2.5 (5V opration), whr th common mod voltag dos not mak xcursions aov this switching point. If th oprational amplifir is connctd as a unity gain uffr, and full input and/or output rail to rail rang is usd, thn provision should mad to allow for slight input offst voltag variations. ikwis th output has pushpull(sourcsink) output stags working in tandm to provid full (s not 4) rail to rail output. In addition, th sourc and sink currnts ar dsignd to provid symmtrical drivs to th load. 3. Th input ias and offst currnts ar ssntially input protction diod rvrs ias lakag currnts, and ar typically lss than 0.01p at room tmpratur. This low input ias currnt assurs that th analog signal from th sourc will not distortd y input ias currnts. Normally, this xtrmly high input impdanc of gratr than Ω would limitd y th sourc impdanc which would limit th nod impdanc. Howvr, for applications whr sourc impdanc is also vry high, it may ncssary to limit nois and hum pickup through propr ground shilding. 4. Th output stag consists of class B complmntary output drivrs, capal of driving a low rsistanc load to ithr supply rail. Th output voltag swing is limitd y th drain to sourc onrsistanc of th output transistors as dtrmind y th ias circuitry, and th valu of th load rsistor. Whn connctd in th voltag followr configuration, th oscillation rsistant fatur, comind with th rail to rail input and output fatur, maks an ffctiv analog signal uffr for mdium to high sourc impdanc snsors, transducrs, and othr circuit ntworks. 5. Th D1721/D1721G oprational amplifir has n dsignd to provid static discharg protction. Intrnally, th dsign has n carfully implmntd to minimiz latch up. Howvr, car must xrcisd whn handling th dvic to avoid strong static filds that may dgrad a diod junction, causing incrasd input lakag currnts. Th usr is advisd to powr up th circuit for, or simultanously with any input voltags applid, and to limit input voltags not to xcd 0.3V of th powr supply voltag lvls at all tims, including during powr up and powr down cycls. 6. Th D1721/D1721G, with its micropowr opration, offrs nfits in rducd powr supply rquirmnts, lss nois coupling and currnt spiks, lss thrmally inducd drift, ttr ovrall rliaility du to lowr slf hating, and lowr input ias currnt. It rquirs practically no warm up tim as th chip junction hats up to 0.1 C or lss aov amint tmpratur undr most oprating conditions. 7. Th D1721/D1721G has an intrnal dsign architctur that provids roust high tmpratur opration. Contact factory for custom scrning vrsions. TYPIC PRFORMNC CHRCTRISTICS SUPPY CURRNT (µ) SUPPY CURRNT S FUNCTION OF SUPPY VOTG INPUTS GROUNDD OUTPUT UNODD T = 55 C 25 C 25 C 7C 125 C 0 0 ±1 ±2 ±3 ±4 ±5 ±6 SUPPY VOTG (V) COMMON MOD INPUT VOTG RNG (V) ±7 ±6 ±5 ±4 ±3 ±2 ±1 COMMON MOD INPUT VOTG RNG S FUNCTION OF SUPPY VOTG 0 0 ±1 ±2 ±3 ±4 ±5 ±6 ±7 SUPPY VOTG (V) 0 OPN OOP VOTG GIN S FUNCTION OF OD RSISTNC 0 INPUT BIS CURRNT S FUNCTION OF MBINT TMPRTUR OPN OOP VOTG GIN (V/mV) K K 1M OD RSISTNC (Ω) INPUT BIS CURRNT (p) MBINT TMPRTUR ( C) D1721/D1721G dvancd inar Dvics 4 of 9

5 TYPIC PRFORMNC CHRCTRISTICS (cont'd) OPN OOP VOTG GIN (V/mV) 0 OPN OOP VOTG GIN S FUNCTION OF SUPPY VOTG ND TMPRTUR C T 125 C 1 0 ±2 ±4 ±6 ±8 SUPPY VOTG (V) OUTPUT VOTG SWING (V) ±6 ±5 ±4 ±3 ±2 OUTPUT VOTG SWING S FUNCTION OF SUPPY VOTG 55 C T 125 C ±1 0 ±1 ±2 ±3 ±4 ±5 ±6 ±7 SUPPY VOTG (V) 5V/div 2V/div RG SIGN TRNSINT RSPONS C = 50pF 5µs/div OPN OOP VOTG GIN (db) 120 OPN OOP VOTG GIN S FUNCTION OF FRQUNCY K 10K K 1M FRQUNCY (Hz) PHS SHIFT IN DGRS RG SIGN TRNSINT RSPONS SM SIGN TRNSINT RSPONS 2V/div V S = ±1.0V C = 50pF mv/div C = 50pF 500mV/div 5µs/div 20mV/div 2µs/div D1721/D1721G dvancd inar Dvics 5 of 9

6 TYPIC PPICTIONS RITORI VOTG FOOWR/BUFFR RITORI VOTG COMPRTOR Z IN = ~ Ω V IN 5V OUTPUT VIN 5V 50K 5V OUTPUT 0 V IN 5V * S Rail to Rail Wavform V 1 V 2 V 3 V 4 HIGH INPUT IMPDNC RITORI PRCISION DC SUMMING MPIFIR 2.5V 2.5V V OUT = V 1 V 2 V 3 V 4 R IN = Ω ccuracy limitd y rsistor tolrancs and input offst voltag V OUT V V IN V V V OUT V 5V INPUT 0V 5V OUTPUT 0V RITORI WVFORM Prformanc wavforms. Uppr trac is th output of a Win Bridg Oscillator. owr trac is th output of Railtorail voltag followr. WIN BRIDG OSCITOR (RITORI) SIN WV GNRTOR PHOTO DTCTOR CURRNT TO VOTG CONVRTR 2.5V 2.5V 10K OUTPUT PHOTODIOD I R F = 5M 2.5V V OUT = 1 X R F C =.01µF.01µF 10K R = 10K f = ~ 1 2πR C ~ 1.6KHz 10K 2.5V R = K * S Rail to Rail Wavform OW VOTG INSTRUMNTTION MPIFIR 1M V K 500K V f max = 20KHz 40mV V IN 40mV 1M V V K 50K V 1M K GIN = 25 V V OUT V. ll rsistors ar 1%. V = 1.0V, V = 1.0V. Short circuit input currnt 1µ. D1721/D1721G dvancd inar Dvics 6 of 9 K V V 1M V V OUT

7 SOIC8 PCKG DRWING 8 Pin Plastic SOIC Packag Millimtrs Inchs S (45 ) D Dim C D8 Min Max Min Max BSC BSC H S S (45 ) H C D1721/D1721G dvancd inar Dvics 7 of 9

8 PDIP8 PCKG DRWING 8 Pin Plastic DIP Packag 1 Millimtrs Inchs Dim Min Max Min Max S D 1 c D S c 1 D1721/D1721G dvancd inar Dvics 8 of 9

9 CRDIP8 PCKG DRWING 8 Pin CRDIP Packag 1 Millimtrs Inchs D Dim Min Max Min Max s C D BSC 7.62 BSC BSC BSC S Ø C 1 D1721/D1721G dvancd inar Dvics 9 of 9

PRECISION LOW POWER CMOS OPERATIONAL AMPLIFIER

PRECISION LOW POWER CMOS OPERATIONAL AMPLIFIER TM DVNCD INR DVICS, INC. PRCISION OW POWR CMOS OPRTION MPIFIR PD D1732/D1732 N B D GNR DSCRIPTION Th D1732/D1732 is a prcision low-cost low-powr monolithic CMOS oprational amplifir intndd for a road rang