PRECISION LOW POWER CMOS OPERATIONAL AMPLIFIER
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1 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 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. Manufacturd with dvancd inar Dvics' nhancd PD silicon gat CMOS procss, th D1732/D1732 is dsignd to st a nw standard in low input signal powr rquirmnts. Th typical input loading at its input is 0.03 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. Th D1732/D1732 is idally suitd for capacitiv and high snsitivity, high impdanc signal sourcs. It is radily suitd for 5V singl supply (or ±2V to ±5V) systms, with low oprating powr dissipation, a traditional strngth of CMOS tchnology. It is offrd with industry standard µ741 and IC7611 pin configurations. Th D1732/D1732 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. This dvic also faturs rail-to-rail input and output voltag rangs, tolranc to ovr-voltag input spiks of 300mV yond supply rails, high opn loop voltag gain, usful andwidth of 1.5MHz, slw rat of 2.1V/µs, and low supply currnt of 0.8m. Finally, th output stag can typically driv up to 400pF capacitiv loads in th unity gain mod and up to 4000pF capacitiv loads at a gain of 5. Ths faturs mak th D1732/D1732 a vrsatil, high prcision oprational amplifir that is usr frindly and asy to us with virtually no sourc loading and zro input-loading inducd sourc rrors. dditionally, roust dsign and rigorous scrning mak this dvic spcially suital for opration in tmpratur-xtrm nvironmnts and ruggd conditions. FTURS & BNFITS xtrmly low input offst voltags and xtrmly low input ias currnts xtrmly low input signal powr Roust high-tmpratur opration Industry standard pinout Rail-to-rail input/output Input ias currnt of 0.01p at input offst voltag of 30µV No xtrnal componnts No intrnal choppr clocking nois No choppr dynamic powr dissipation Simpl and cost ffctiv Small packag siz Driv up to 4000pF load capacitanc ow powr dissipation Suital for ruggd, tmpratur-xtrm nvironmnts PPICTIONS Prcision cal drivr Snsor intrfac circuits Unity gain uffr amplifir Prcision analog cal drivr Transducr iasing circuits Capacitiv and charg intgration circuits Biochmical pro intrfac Signal conditioning Portal instrumnts High sourc impdanc lctrod amplifirs Prcision Sampl and Hold amplifirs Prcision currnt to voltag convrtr rror corrction circuits Snsor compnsation circuits Prcision gain amplifirs Systm output lvl shiftr PIN CONFIGURTION ORDRING INFORMTION ( suffix dnots lad-fr (RoHS)) Oprating Tmpratur Rang C to 7C C to 7C -55 C to 125 C 8-Pin 8-Pin 8-Pin Small Outlin Plastic Dip CRDIP Packag (SOIC) Packag Packag D1732S D1732P D1732S D1732P D1732S D1732P D1732D D1732S D1732P D1732D * Contact factory for ladd (non-rohs) or high tmpratur vrsions. TOP VIW S, P, S, P, D PCKGS * I/C pins ar intrnally connctd. Do not connct xtrnally dvancd inar Dvics, Inc., Vrs of 9 I/C -IN IN V I/C V OUT N/C
2 BSOUT MXIMUM RTINGS Supply voltag, V 10.6V Diffrntial input voltag rang -0.3V to V 0.3V Powr dissipation 600mW Oprating tmpratur rang S, P, 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 T = 25 C unlss othrwis spcifid D1732 D1732 Tst Paramtr Symol Min Typ Max Min Typ Max Unit Conditions Supply Voltag VS ±2.0 ±5.0 ±2.0 ±5.0 V Dual Supply V V Singl Supply Input Offst Voltag VOS µv RS 100KΩ Input Offst Currnt IOS p T = 25 C p C T 7C Input Bias Currnt IB p T = 25 C p C T 7C Input Voltag Rang VIR V V = 5V V VS = ±2.5V Input Rsistanc RIN Ω Input Offst Voltag Drift TCVOS 5 5 µv/ C RS 100KΩ Powr Supply Rjction Ratio PSRR db RS 100KΩ Common Mod Rjction Ratio CMRR db RS 100KΩ arg Signal Voltag Gain V V/mV R = 10KΩ V/mV R = 1MΩ Output Voltag Rang VO low V R = 1MΩ, V = 5 VO high V C T 7C VO low V R =10KΩ VO high V C T 7C Output Short Circuit Currnt ISC 8 8 m Supply Currnt IS m VIN = 0V, No oad Powr Dissipation PD mw VS = ±2.5V Input Capacitanc CIN 1 1 pf Maximum oad C pf Gain = 1 Capacitanc pf Gain = 5 Input Nois Voltag n nv/ Hz f = 1KHz Input Currnt Nois in f/ Hz f = 10Hz Bandwidth BW MHz Slw Rat SR V/µs V = 1, R = 10KΩ D1732/D1732 dvancd inar Dvics 2 of 9
3 OPRTING CTRIC CHRCTRISTICS (cont'd) T = 25 C unlss othrwis spcifid (cont'd) D1732 D1732 Paramtr Symol Min Typ Max Min Typ Max Unit Tst Conditions Ris tim tr µs R = 10KΩ Ovrshoot Factor % R = 10KΩ, C = 100pF Sttling Tim ts µs 0.01% µs 0.1%, V = -1, R= 1MΩ, C = 25pF T = 25 C V S = ±5.0V unlss othrwis spcifid D1732 D1732 Paramtr Symol Min Typ Max Min Typ Max Unit Tst Conditions Powr Supply Rjction Ratio PSRR db R S 100KΩ Common Mod Rjction Ratio CMRR db R S 100KΩ arg Signal Voltag Gain V V/mV R = 10KΩ Output Voltag Rang V O low V R = 10KΩ V O high Bandwidth B W MHz Slw Rat S R V/µs V = 1, C = 50pF -55 C T 125 C unlss othrwis spcifid D1732 D1732 Paramtr Symol Min Typ Max Min Typ Max Unit Tst Conditions Input Offst Voltag VOS mv RS 100KΩ Input Offst Currnt IOS n Input Bias Currnt IB n Powr Supply Rjction Ratio PSRR db RS 100KΩ Common Mod Rjction Ratio CMRR db RS 100KΩ arg Signal Voltag Gain V V/mV R = 10KΩ Output Voltag Rang VO low V R = 10KΩ VO high V D1732/D1732 dvancd inar Dvics 3 of 9
4 Dsign & Oprating Nots: 1. Th D1732/D1732 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. In a convntional CMOS oprational amplifir dsign, compnsation is achivd with a pol splitting capacitor togthr with a nulling rsistor. This mthod is, howvr, vry ias dpndnt and thus cannot accommodat th larg rang of supply voltag opration as is rquird from a stand alon CMOS oprational amplifir. Th D1732/D1732 is intrnally compnsatd for unity gain staility using a novl schm that dos not us a nulling rsistor. This schm 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. unity gain uffr using th D1732/D1732 will typically driv 400pF of xtrnal load capacitanc without staility prolms. In th invrting unity gain configuration, it can driv up to 800pF of load capacitanc. Compard to othr CMOS oprational amplifirs, th D1732/D1732 has shown itslf to mor rsistant to parasitic oscillations. 2. Th D1732/D1732 has complmntary p-channl and n-channl input diffrntial stags connctd in paralll to accomplish rail to rail common mod input voltag rangs. This mans that with th rangs of common mod input voltag clos to th powr supplis, on of th two diffrntial stags is switchd off intrnally. To maintain compatiility with othr oprational amplifirs, this switching point has n slctd to aout 1.5V aov th ngativ supply voltag. Sinc offst voltag trimming on th D1732/D1732 is mad whn th input voltag is symmtrical to th supply voltags, this intrnal switching dos not affct a larg varity of applications such as an invrting amplifir or non-invrting amplifir with a gain largr than 2.5 (5V opration), whr th common mod voltag dos not mak xcursions low this switching point. Th usr should howvr, awar that this switching dos tak plac if th oprational amplifir is connctd as a unity gain uffr and should mak provisions in th dsign to allow for input offst voltag variations. 3. Th input ias and offst currnts ar ssntially input protction diod rvrs ias lakag currnts, and ar typically lss than 1p 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 not a prolm as th sourc impdanc would limit th nod impdanc. Howvr, for applications whr sourc impdanc is vry high, it may ncssary to limit nois and hum pickup through propr shilding. 4. Th output stag consists of class B complmntary output drivrs, capal of driving a low rsistanc load. Th output voltag swing is limitd y th drain to sourc on-rsistanc 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 D1732/D1732 oprational amplifir has n dsignd to provid full 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. In using th oprational amplifir, 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. 6. Th D1732/D1732 has an intrnal dsign architctur that provids roust high tmpratur opration. Contact factory for custom scrning vrsions. 2.5 TYPIC PRFORMNC CHRCTRISTICS SUPPY CURRNT S FUNCTION OF SUPPY VOTG ±6 COMMON MOD INPUT VOTG RNG S FUNCTION OF SUPPY VOTG SUPPY CURRNT (m) INPUTS GROUNDD UNODD T = -55ºC -25 C 25 C 8C 125 C COMMON MOD INPUT VOTG RNG (V) ±5 ±4 ±3 ±2 ±1 T = 25 C 0 0 ±1 ±2 ±3 ±4 ±5 ±6 SUPPY VOTG (V) 0 0 ±1 ±2 ±3 ±4 ±5 ±6 SUPPY VOTG (V) OPN OOP VOTG GIN S FUNCTION OF SUPPY VOTG ND TMPRTUR INPUT BIS CURRNT S FUNCTION OF MBINT TMPRTUR OPN OOP VOTG GIN (V/mV) C { 25 C { 125 C { R = 10KΩ R = 5KΩ INPUT BIS CURRNT (p) ±1 ±2 ±3 ±4 ±5 ± SUPPY VOTG (V) MBINT TMPRTUR ( C) D1732/D1732 dvancd inar Dvics 4 of 9
5 TYPIC PRFORMNC CHRCTRISTICS (cont'd) ±6 VOTG SWING S FUNCTION OF SUPPY VOTG 1000 OPN OOP VOTG GIN S FUNCTION OF OD RSISTNC VOTG SWING (V) ±5 ±4 ±3 ±2 ±1-55 C T 125 C R = 10KΩ R = 2KΩ OPN OOP VOTG GIN (V/mV) T = 25 C 0 ±1 ±2 ±3 ±4 ±5 ±6 1K 10K 100K 1000K SUPPY VOTG (V) OD RSISTNC (Ω) OPN OOP VOTG GIN (db) OPN OOP VOTG GIN S FUNCTION OF FRQUNCY T = 25 C PHS SHIFT IN DGRS 5V/div RG-SIGN TRNSINT RSPONS 1V/div T = 25 C R = 100KΩ C = 50pF 2µs/div K 10K 100K 1M 10M FRQUNCY (Hz) SM-SIGN TRNSINT RSPONS 100mV/div T = 25 C R = 10KΩ C = 50pF 20mV/div 2µs/div D1732/D1732 dvancd inar Dvics 5 of 9
6 TYPIC PPICTIONS RI TO RI VOTG FOOWR/BUFFR RI-TO-RI WVFORM ~ Z IN = Ω V IN - 5V 400pF 0.1µF C R =10KΩ 5V INPUT 0V 5V 0V 0 V IN 5V Prformanc wavforms. Uppr trac is th output of a * S rail to rail wavform Win Bridg Oscillator. owr trac is th output of Rail-to-rail voltag followr. OW OFFST SUMMING MPIFIR PHOTO DTCTOR CURRNT TO VOTG CONVRTR 50K R F = 5M 10K 2.5V INPUT 1 INPUT 2-10K GIN = 5 * Circuit Drivs arg oad Capacitanc 4000pF - 2.5V.01µF.01µF C = 4000pF PHOTODIOD I - 2.5V -2.5V V OUT = I x R F R = 10K WIN BRIDG OSCITOR (RI-TO -RI) SIN WV GNRTOR RI-TO-RI VOTG COMPRTOR - 2.5V -2.5V 10K V IN 5V - 5V 0.1µF C =.01µF.01µF 10K R = 10K f = ~ 1 2πR C ~ 1.6KHz 10K 50K 10M * S rail to rail wavform D1732/D1732 dvancd inar Dvics 6 of 9
7 SOIC-8 PCKG DRWING 8 Pin Plastic SOIC Packag Millimtrs Inchs S (45 ) D Dim 1 C D-8 Min Max Min Max BSC BSC H S S (45 ) H C D1732/D1732 dvancd inar Dvics 7 of 9
8 PDIP-8 PCKG DRWING 8 Pin Plastic DIP Packag 1 Millimtrs Inchs Dim Min Max Min Max S D 1 c D S c 1 D1732/D1732 dvancd inar Dvics 8 of 9
9 CRDIP-8 PCKG DRWING 8 Pin CRDIP Packag 1 Millimtrs Inchs D Dim 1 Min Max Min Max s 1 C D BSC 7.62 BSC BSC BSC S Ø C 1 D1732/D1732 dvancd inar Dvics 9 of 9
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