OBSOLETE OP-44 HIGH -SPEED, PRECISION OPERATIONAL AMPLIFIER (AVCL;':::3) . Radiation Hard

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1 M) Precision Monolithics nc OP-44 HGH -SPEED, PRECSON OPERATONAL AMPLFER (AVCL;':::3) FEATURES Sle Rate 1V/Min Gain-Bandidth Product 15MH Min Common-Mode 86dBMin Open-LoopGain 5V/mVMin Offset Voltage 75/lV Max BiasCurrent 2pAMax Excellent AC CMR and PsR Radiation Hard Plastic Mini-Dip and SOC to be announced For devices processed in total compliance to ML-STD-883, add /883 after part number Consult factory for 883 data sheet t Burn-in is available on commercial and industrial temperature range parts in cerdip, plastic dip, and TO-can packages For ordering information, see 1988 Data Book, Section 2 GENERAL DESCRPTON The OP-44 is a fast precision JFET-input operational amplifier delivering a 12V//ls typical sle rate in closed-loop gains of three or more Full-poer bandidth is 2MH for a 2Vp_p sine-ave, and 4MH for a 1Vp_p signal Gain-bandidth product is typically 23M H Settling time to 1% is 2ns, and to 12 bits (1%) is 8ns, typical Wideband noise is minimied by only 12nV/$ flatband noise Excellent DC precision makes the OP-44 unique among highspeed amplifiers Offset voltage belo 75/lV and 1/lV/oC maximum drift eliminates the need for external nulling potentiometers in most applications Common-mode rejection of 86dB minimum and an open-loop gain of 5V/mV ensures high linearity Errors due to bias current are virtually eliminated ith the OP-44's 2pA maximum input current ORDERNG NFORMATONt TA = 2SoC PACKAGE OPERATNG Vas MAX HERMETC TEMPERATURE (mv) TO-99 DP LCC RANGE 1 OP44AJ OP44A OP44ARC/883 ML 75 OP44EJ OP44E - ND 15 OP44FJ OP44F ND PN CONNECTONS 8-PN HERMETC (-Suffix) --' 3uu u, u j u :J DP NC 8 NULLS7 v+ -N 2 +N 3 4 V- (CASE TO-99 (J-suffix) 6 OUT 5 NULL 2-CONTACT HERMETC LCC (RC-Suffix) SMPLFED SCHEMATC V+ +N -N VOUT V- NU 111 NU 151 1/87, Rev B 1 --

2 !PM) OP-44 HGH-SPEED, PRECSON OPERATONAL AMPLFER Applications for the OP-44 include data acquisition systems, pulse amplifiers, RF, F and video amplifiers, and signal generators The OP-44 conforms to the standard 741 pinout ith nulling to V- t offers an excellent upgrade for circuits using the LF4 and AD59 The HA-252/22/25 are easily upgraded by removing any external nulling components For a unity-gain stable amplifier sharing many of the OP-44's characteristics, consult the OP-42 data sheet ABSOLUTE MAXMUM RATNGS (Note 1) Supply Voltage :!:2V nternal Poer Dissipation (Note 3) 5mW nput Voltage (Note 2) :!:2V Differential nput Voltage (Note 2) 4V PeakOutputCurrent 5mA Storage Temperature Range -65 C to 175 C Operating Temperature Range OP-44A(J,) -55 Cto+125 C OP-44E,F(J,) -25 Cto+85 C Junction Temperature -65 C to 175 C Lead Temperature Range (Soldering, 6 sec) 3 C NOTES: 1 Absolute maximumratings apply to both DCEand packaged parts, unless otherise noted 2 Forsupply voltages less than i:2v,the absolute maximum input voltage is equal to the supply voltage 3 See table for maximumambient temperature and derating factor PACKAGE TYPE TO-99 (J) Hermetic 8-Pin DP () Hermetic 2-Contact LCC (RC) MAXMUMAMBENT DERATE ABOVE TEMPERATURE MAXMUM AMBENT FOR RATNG TEMPERATURE 8 C 75 C 71mW/oC 67mWrC 72 C 78mW/oC ELECTRCAL CHARACTERSTCS at Vs =:!:15V,TA= 25 C, unless otherise noted OP-44E OP-44F OP-44A PARAMETER SYMBOL CONDTONS MN TYP MAX MN TYP MAX MN TYP MAX UNTS Offset Voltage Vos t nput Bias Current nput Offset Current los s VCM = OV T, = 25 C nput Voltage Range VR (Note 1) Common-Mode VCM = OV T, = 25 C :':11 CMR VCM = :':11V Poer-Supply Ratio PSRR Vs = :':1V to :':2V mv :': pa 96 8 :': db pa v pv/v Large-Signal Voltage Gain AyO RL = 1k!l RL = 2k!l RL=lk!l Vo = :':1V Ti=25 C V/mV Output Sing Voltage Vo RL=1kfl :': :': :': V Output Current lout :': :': :': ma Supply Current SY No Load Vo = OV ma Sle Rate SR RL = 2k!l CL = 5pF V/ps Full-Poer Bandidth BWp Vo = :':1V (Note 2) MH Gain-Bandidth Product GBW Ay= 1 (Note 3) MH Settling Time ts 1V Step 1% (Note 4) ps Rise Time t, Overshoot Overload Recovery tor Time Vo = :':2mV (Note 3, 4) Vo = :':2mV (Note 3, 4) ns ns % Capacitive Load Drive Capability CL AYCL 2: 3 (Note 3) pf 2 1/87, Rev 81

3 ELECTRCAL M OP-44 HGH-SPEED,PRECSONOPERATONALAMPLFER CHARACTERSTCS at Vs= :!::15V,TA= 25 C, unless otherise noted (Continued) OP-44E OP-44F OP-44A PARAMETER SYMBOL CONDTONS MN TYP MAX MN TYP MAX MN TYP MAX UNTS nput Resistance R'N (Note 3) 1 1'2-1 1' f1 OP-44E Open-Loop Output Resistance Voltage Noise Voltage Noise Density Current Noise Density External Vos Trim Range Ro f1 enpop en 1H to 1H = 1H fo = 1H fo = 1kH fo = 1kH JlVp-p nv)h in - fo = 1kH pa/)h RpO!= 1kf mv Long-Term JlVl Vos Drift month Supply Voltage Range Vs (Note 3) :t8 :t15 :t2 :t8 :t15 :t2 :t8 :t15 :t2 V NOTES: 1 Guaranteed by CMR test 3 Guaranteed but not tested 2 Guaranteed by sle-rate test and formula BWp= SR/(21T1VpEAK)' 4 See test circuit, page 7 ELECTRCAL CHARACTERSTCS at Vs = ::t15v, -25 C::; TA::; 85 C for ElF grades, and -55 C::; TA::; 125 C for A grade, unless otherise noted OP-44F OP-44A PARAMETER SYMBOL CONDTONS MN TYP MAX MN TYP MAX MN TYP MAX UNTS Offset Voltage Vos mv Offset Voltage Temperature TCVos JlVrC Coefficient nput Bias Current 16 (Note 1) na nput Offset Current los (Note 1) na nput Voltage Range VR (Note 2) :t11 :t11 - :t11 V Common-Mode Poer-Supply Ratio CMR VCM=:t11V db PSRR Vs= :t1v to :t2v Large-Signal RL = 1kf! (Note 1) Ava Voltage Gain RL = 2kf! Vo= :t1v Output Voltage Va RL = 2kf! :t11 :t11 :t11 V Sing Output Current lout :t8 - :t8 - :t8 - ma No Load Supply Current - SY ma Va = OV Sle Rate SR RL = 2kf!; CL = 5pF VlJls Capacitive Load AVCL 2: 3 CL Drive Capability pf (Note 3) NOTES: 1 TJ = 85 C lor ElF Grades; TJ= 125 C for A grade 2 Guaranteed by CMR test 3 Guaranteed but not tested JlVlV V/mV 3 1/87, Rev 81

4 DCE CHARACTERSTCS jpm) OP-44 HGH-SPEED, PRECSON OPERATONAL AMPLFER 1 OFFSET VOLTAGE NULL 2 NVERTNG NPUT 3 NONNVERTNG NPUT 4 NEGATVE SUPPLY 5 OFFSET VOLTAGE NULL 6 AMPLFER OUTPUT 7 POSTVE SUPPLY t DE SE 98 X 7 inch, 686 sq mils (249 X 178 mm, 443 sq mm) For additional DCE ordering information, refer to 1988 Data Book, Section 2 WAFER TEST LMTS at Vs =::t15v, 1) = 25 C, unless otherise PARAMETER SYMBOL CONDTONS Offset Voltage Vas nput Bias Current nput Offset Current nput Voltage Range 18 VCM = OV 1S VCM = OV VR (Note 1) noted OP-44N LMT UNTS 15 mvmax 25 pa MAX 5 pa MAX :1:11 V MN Common-Mode Poer-Supply Large-Signal Voltage Gain Ratio Output Voltage Sing Output Current CMR VCM = :1:11V PSRR Ava Va lout Vs = :1:1Vto :1:2V RL = 1k!l RL = 2k!l RL=1k!l RL = 1k!l 8 db MN 5 pv/vmax 5 2 VlmV MN 1 :1:115 V MN :1:2 mamn Supply Current SY Sle Rate SR No Load Va = OV 75 ma MAX 8 Vps M N Capacitive Load Drive Capability CL AVCL 2: 3 (Note 2) 5 pf MN NOTES: 1 Guaranteed by CMR test 2 Guaranteed but not tested Electrical tests are performed at afer probe to the limits shon Due to variations in assembly methods and normal yield loss, yield after packaging is not guaranteed for standard product dice Consult factory to negotiate specifications based on dice lot qualification through sample lot assembly and testing 4 1/87, Rev 81

5 TYPCALPERFORMANCECHARACTERSTCS OPEN-LOOP GAN, PHASE COMMON-MODE REJECTON!< m 8 6 <i C> Q 4 2 W Q k 1k look 1M 1M 1M FREQUENCY (H) SLEW RATEvs TEMPERATURE!PM) OP-44 HGH-SPEED, PRECSON OPERATONAL AMPLFER m 1 9 ;:: U - ;;J 18 6 < 225 J: Q :f 4 27 :f :f u k 1k look 1M FREQUENCY (H) SLEW RATE vs DFFERENTAL NPUT VOLTAGE TA = 25 C Vs = 15V TA = 25 C Vs = ct15v \ \ 1M 12 1 m 8 ;:: U 6 ;;J 4 Q :J ii 2 Q POWER-SUPPLYREJECTON +PSR -PSR k 1k look 1M 16 TA= 5 C 15 -Vs = ct15v FREQUENCY (H) SLEW RATEvs CAPACTVELOAD - -- r TEMPERATURE( G) DFFERENTAL NPUT VOLTAGE (VOLTS) CAPACTVE LOAD (pf) 6 5 m 4 3 C> Q U CLOSED-LOOP GAN TOTAL HARMONC DSTORTON + NOSE CLOSED-LOOP OUTPUT MPEDANCEvsFREQUENCY 1 9 TA = 25 C Vs= ct15v 8 Vo = V RMS AYCl=3 7 1 Rl = 2kfJ AYCl=3 s:6 5 + < J: 4 Q :f k 1k look 1M FREQUENCY (H) 1M 1M k 1k look 1 k 1k look 1M 1M FREQUENCY(H) FREQUENCY(H) - 5 1/87, Rev 81

6 TYPCALPERFORMANCECHARACTERSTCS 3 25 J 2 15 ::; ::; 1 ::; MAXMUM OUTPUT SWNG TA= 25 C Vs =,15V AVCL= +3 RL= 1kO 1% DSTORTON 1k 1k 1k 1M 2 FREQUENCY (H) VOLTAGE NOSE DENSTY ;; 15 E 125 f en f > 25 - 'i- -' k FREQUENCY (H) jpm) OP-44 HGH-SPEED, PRECSON OPERATONAL AMPLFER TA = 251o1 -\ - - Vs :t15v 1M 1k 3 25 :t2 Q 3' 15 1 OUTPUT SWNG vs LOAD RESSTANCE 1 1 1k LOAD RESSTANCE () SUPPLY CURRENT vs TEMPERATURE 66 Vs,15J 65 _NO LOAD :;< 64 E- - if: 63 u 62 Q Q 61 6 TA 5l Vs =,15V - AVCL = kH 1% DSTORTON SO 75 TEMPERATURE(OC) 1k :;< g 4-35 u 3 - Q - 25!: 2 U U 15-1 SHORT CRCUT OUTPUT CURRENT vs JUNCTON TEMPERATURE - ' :;< 64 g - if: 63 U 62 Q Q 61 6 JUNCTON TEMPERATURE (OC) SUPPLYCURRENT vs SUPPLYVOLTAGE 59 H TB :t12,16 SUPPLY VOLTAGE (VOLTS) 125,*, TYPCAL DSTRBUTON OF TCVos - Vs :t15v, 3UNTS FROM 3 RUNS TCVos (pv/oc) 1' 1' :;<!O - g:1o' u OJ 1' BAS, OFFSET CURRENT vs JUNCTON TEMPERATURE =s:t15v -YOMOV, BASCURRENT / E OFFSE+CURRENT 1' -75 -SO JUNCTON TEMPERATURE( G) / :;- E 5 :;;; 4 Q S OPEN-LOOP GAN vs JUNCTON TEMPERATURE ' JUNCTON TEMPERATURE (OC) VS=i,5V RL 2kO /87, Rev

7 APPLCATONS NFORMATON PM) OP-44 HGH-SPEED, PRECSON OPERATONAL AMPLFER The OP-44 is a high-speed amplifier internally compensated for closed-loop gains of 3 or more Sle rate is typically 12V/Jts, hich allos the OP-44 output to handle a 2Vp_psine ave at 2MH Stability is ensured by the OP-44's guaranteed capacitive load drive ability of 5pF The input capacitance of high-speed op amps often causes a noticeable degradation of pulse response, resulting in excessive overshoot and ringing The pole introduced by the input capacitance can be compensated by placing a similar capacitance in the feedback loop of the amplifier For the OP-44, the input capacitance is typically 6pF Small-signal and large-signal transient responses are shon in Figures 1 and 2 These photos ere taken using the gain of 3 test circuit shon in Figure 3 As ith most JFET-input op amps, the output of the OP-44 may undergo phase inversion if either input exceeds the specified input voltage range Phase inversion ill not damage the amplifier, nor ill it cause an internal latch-up Supply decoupling must be used to overcome inductance and resistance associated ith the supply lines to the amplifier For most applications, a 1JtF to 1JtF placed beteen each supply pin and ground is adequate fsupply lines are extremely long and/or noisy, an additional tantalum capacitor beteen 33JtFand 1JtFshould be placed in parallel ith each of the smaller decoupling capacitors The OP-44 displays excellent resistance to radiation Radiation hardness data is available by contacting the factory FGURE3: Transient Response V,N SpF Test Circuit VOUT FGURE 1: Small-Signal Transient Response (AVCL= +3, CL = 5pF) OFFSET VOLTAGEADJUSTMENT Offset voltage is adjusted ith a 1kD to 1kD potentiometer as shon in Figure 4 The potentiometer is connected beteen pins 1 and 5 ith its iper connected to the V- supply Nulling Vas in this manner changes TCVas by no more than 5JtV/oCper millivolt of Vas change Alternately, Vas may be nulled by attaching the potentiometer iper through a 1MD resistor to the positive supply rail FGURE4: nput Offset Voltage Nulling FGURE 2: Large-Signal Transient Response (AVCL= +3, CL= 5pF) V- V+ v- 1MH v- ALTERNATE METHOD STANDARD METHOD NOTE, Vos CAN BE TRMMED WTH POTENTOMETER RANGNG FROM 1W TO 1k!1 7 1/87, Rev 81

8 !PM) OP-44 HGH-SPEED, PRECSON OPERATONAL AMPLFER Digital offset correction is possible using the nulling pins The FGURE 6: High-Speed, Lo-Offset, Lo-Drift Amplifier circuit of Figure 5 ill correct for greater than :t4mv of offset, alloing correction of some system errors in addition to the R R2 OP-44's offset voltage One of the four voltage-output DACs on 2kO the PM-7226 is used to apply a voltage beteen OVand 1Vto the 2kfl resistor, hile the 255kfl resistor is tied to the +1V reference One LSB of the 8-bit PM-7226 is equivalent to approximately 35pV of offset change around the ero offset point V'N VOUT FGURE 5: Digital Offset Correction +15V REF-O1 6 VAEF 1/4 PM kO --- DGTAL NPUT 2ookO A common problem ith many high-speed amplifiers is a requirement for more DC precision than the amplifier's capability While the OP-44 already offers an order of magnitude or more improvements in precision over previous high-speed amplifiers, some users may find a need for even greater precision Figure 6 shos a combination amplifier melding the precision DC characteristics of an OP-97 ith the high speed of the OP-44 The OP-97 reacts for lo-frequency and DC signals, hile the OP-44 is dominant at higher frequencies Overcompensation of the OP-97 ensures that it operates only at lo frequencies Resistor matching is important to optimie this circuit's transient response The overall supply current of this combination amplifier is only slightly higher than that of the OP-44 alone This is due to the minimal consumption of the OP-97, only 6pATransient response of this circuit is shon in Figure 7 ts initial offset voltage is 2pV,hile TCVos is less than O6pV! C R1 2kO FGURE 7: Combination F R2 18kO Amplifier Transient Response FGURE8: Combination AmplifierVas vs Temperature 1 :; t 2 Q ẉ ::! -2 : -4,, - -- 'i -6 -so r Vs=:t15V Vcu=OV / / / l TEMPERATURE(OC) m / V /87, Rev

9 FGURE 9: Programmable!PM) OP-44 HGH-SPEED, PRECSON OPERATONAL AMPLFER Baseline Restorer +15V R2 2k11 V'N R1 2k11 VOUT VPROGRAM RpROGRAM 15k11 VREF Baseline restoration is another useful technique for correcting errors introduced by amplifier drift, or by electromagnetic pickup High-impedance sources, such as a human body, are notorious for large DC drifts n many cases, here pulse or AC measurements are being made, and the pulse height above a nominal DC line contains the important information While a simple high-pass filter may be adequate for some situations, the baseline restorer shon in Figure 9 allos a ide degree of flexibility for analog adaptive filtering techniques, and offers some benefits not available ith a frequency-domain filter -15V FGURE 1: Baseline Restorer Response The baseline restorer behaves as a nonlinear filter, acting upon the sle rate of the input signal rather than its frequency ts output ill restore the base of the pulses to an arbitrary level, set by VREFThe sle rate cutoff of the filter is set by the current floing through 1, hich is in turn set by VPROGRAM VREFand VPROGRAMmay be controlled by a voltage-output DACsuch as the PM-7226 fcurrent programming is desired, RpROGRAMmay be removed and replaced by a current-source, such as a bipolar DAC To understand the circuit's operation, assume that capacitor C has charged to the DC baseline f the output sings above the baseline, C2 sings lo, reverse biasing diode D2 D1 is pulled lo, and forard biases A current (12 - '1) discharges the capacitor until equilibrium is restored fthe output drops belo the baseline, C2 sings high, and D2 becomes forard biased 12is supplied by the output of C2 hile 11charges C until the baseline is restored The rate of restoration depends upon the current available to charge or discharge C For symmetric operation, ith the same restoration rate for positive or negative excursions from the baseline, 12must be tice '1, This provides an equal current for charging and discharging the capacitor 11 is set by the current floing through 1 in the MAT-O4An identical current flos through each transistor The MAT-O3matched PNP pair, 5 and 6, act as a current mirror to reflect the current through 2 (11)3 and 4 create '2, hich is tice 1111may be set anyhere beteen a fe nanoamps to several ma Higher currents ill result in rejection of faster-sleing signals, hile loer currents ill allo passage of sloer signals The OP-44 is configured for a gain of -1, but gain is adjustable by R1 and R2, and is simply -(R2/R1) OP-44 stability is maintained by the dominant pole introduced by C 9 1/87, Rev 81