AY J, Bitporuemones LM108/A - LM208/A LM308/A PRECISION SINGLE OPERATIONAL AMPLIFIERS Outstanding characteristics of LM108A : a INPUT OFFSET VOLTAGE : 0O.5mV MAXIMUM a INPUT BIAS CURRENT : 3nA MAXIMUM OVER FULL TEMPERATURE RANGE = INPUT OFFSET CURRENT : 0.4nA MAXI- MUM OVER FULL TEMPERATURE RANGE es POWER SUPPLY CURRENT : 600A MAXIMUM = GUARANTEED DAIFT CHARACTERISTICS se SLEW RATE OF 10V/us AS INVERTING AMPLIFIER DESCRIPTION The LM308,A is a precision operational amplifier having specifications a factor ten better than FET amplifiers over a -55C to +125C temperature range. Selected units are available with offset volt- ages less than 1mV and drifts less than 5mV/C. This makes it possible to eliminate offset adjust- ments, in most cases. The device operates with supply voltages from +2V to +22V and has sufficient supply rejection to use unregulated supplies. Although the circuit is inter- changeable with and uses the same compensation as the LM101A, an altemate compensation scheme can be used to make it particularly insensitive to power supply noise and to make supply bypass capacitors unnecessary. PIN CONNECTIONS (top views) DIPS (Plastic Package) J CERDIPS (Cerdip Package) Can. sos (Plastic Micropackage) H TO9s9 (Metal Can) ORDER CODES Part Temperature Package Number Range HINIJ1D LM108/A -55, +125C eje]e . LM208/A 40, +105C e[efe . LM308/A 0, +70C | e]e . Examples : LM108H, LM108AH, LM308N sos TOs9 DIP8/CERDIPS NV if 4 2q 1} 7 rp ~~] 6 ns 5 108-01.EPS 108-02.EPS 1 - Frequency compensation 2 - Inverting input 3 - Non-inverting input 4-Voc 5-N.C. 6 - Output 7 -Vec* 8 - Frequency Compensation December 1992 V7 108-01. TBLpe mrmeppegene LM108,A-LM208,A-LM308,A SCHEMATIC DIAGRAM COMPENSATION COMPENSATION 4 O 1] Vec* Ra | | RS R6 20k 20k 10k, a7 ag ait os} ai R10 Inverting Input R14 | 9402 ais Non inverting oO Do Q20 + aw ! 820Q i r_ @24 | AIS he CJ Voo 108-03.EPS ABSOLUTE MAXIMUM RATINGS Symbol Parameter LM108,A LM208,A LM308,A Unit Vec | Supply Voltage +22 +22 +22 Vv Vi Input Voltage - (note 2) +15 +15 Vv lia Differential Input Current - (note 1) +10 +10 + Prot Power Dissipation 500 mw Output Short-circuit Duration Infinite Toper | Operating Free-air Temperature Range -55 to+125 | 40 to +105 0 to +70 C Tstg Storage Temperature Range ~65 to+150 | -65to+150 | -65 to +150: C Notes : 1. The inputs are shunted with back-to-back diodes for overvoltage protection. Therefore, excessive current will flow if a differential input voltage in excess of 1V is applied between the inputs unless some limiting resistance is used. 2. For supply voltages less than +15V, the absolute maximum input voitage is equal to the supply voltage. Ss SGS-THOMSON SE taicROELECTRONICSLM108,A-LM208,A-LM308,A ELECTRICAL CHARACTERISTICS +5V < Voc < +20V, Ci = 30pF, Tamb = 25C (unless otherwise specified) LM108A - LM208A Symbol Parameter LM306A Unit Min. | Typ. Max. Vio Input Offset Voltage (Rs < 10kQ) mV ' Tamb = 25C 0.3 0.5 Tmin. = Tamb S$ Tmax. 0.75 LM108A - LM208A 1 li input Bias Current nA Tamb = 25C LM108A - LM208A 0.6 2 LM308A . 4 Trin. < Tamb S Tmax. LM108A - LM208A 3 LM308A 7 lio Input Offset Current nA Tamb = 25C 0.05 | 0.2 Trin. $ Tamb S Tmax. 0.4 Avd Large Signal. voltage Gain (Vcc = +15V, Vo = +10V, Ri = 10kQ) VimvV amb = 80 300 Twin. S ee S Tmax. 60 SVR_ | Supply Voltage Rejection Ratio (Rs < 10kQ) 6B Tamp = 25C 96 110 Trin. S Tamb S Tmax. 96 lec Supply Current no Load mA Tam = 25C 0.3 0.6 Tin. S Tamb < Tmax. 0.6 Vien | Input Common Mode Voltage Range (Vcc = +15V) Vv Tamp = 25C +14 i Tin. < Tamp S Tmax. +14 : CMR | Common Mode Rejection Ratio (Rs < 10kQ) dB Tamb = 25C 96 110 Tmin. < Tamb < Tmax. 96 los Output Short-circuit Current (Vcc = +15V) 3 10 20 mA *Vopp | Output Voltage Swing (Voc = +15V, Ri = 10kQ) Vv Tamb = 13 14 Tmin. < foe < Tmax. 13 SR Slew Rate Vis (Voc = $15V, Vi = 10V, Ri = 10k, CL = 100pF, Tamn = 25C, 0.15 unity gain) t Rise Time us (Voc = +15V, Vi = t20mV, RL = 10kQ, C. = 100pF, unity gain) 0.7 Koy Overshoot % (Voc = t15V, Vi = 20 mV, Ri = 10kQ, C. = 100pF, unity gain) 10 Ri Input Resistance (Vcc = +15V) 30 70 MQ GBP | Gain Bandwidth Product MHz (Vcc = +15V, Vi= 10mV, Ri = 10k, C. = 100pF, f = 100kHz) 0.3 0.8 THD | Total Harmonic Distortion % (Vcc = 15V, f = 1kHz, Ay = 20dB, Ri = 10kQ, Vo = 2Vpp, Ci = 100pF) 0.12 en Equivalent Input Noise Voltage nv (Vcc = +15V, f = 1kHz, Rs = 1009) 20 VHz DVio__| input Offset Voltage Drift pvfc | J Trin. S Tamb S Tmax. 1 5 e Dlg | Input Offset Current Drift pArc | 3 Tmin. S Tamb S$ 25C 0.5 25 S 3/7LM108, A-LM208,A-LM308,A ELECTRICAL CHARACTERISTICS t5V < Voc < +20V, C1 = 30pF, Tamp = 25C (unless otherwise specified) sy Pa LM108 - LM208 LM308 Unit Min. | Typ. | Max. | Min. | Typ. | Max. Vio Input Offset Voltage (Rs $ 10kQ) mV Tam = 25C 0.7 2 2 7.5 Trin. S Tamb Tmax. 3 10 lib Input Bias Current nA Tamb = 25C 0.6 2 0.6 7 Tmin. S Tamb S Tmax. 3 10 lio Input Offset Current nA Tamb = 25C 0.05 | 0.2 0.05 1 Tin. S Tamb < Tmax. 0.4 15 Ava Large Signal Voltage Gain VimvV (Vcc = 15V, Vo = +10V, RL = 10k) Tamb = 25C 50 300 25 300 Tmin. S Tamb S Tmax. 25 15 SVR Supply Voltage | Rejection Ratio (Rs < 10kQ) dB amb = 80 96 80 96 Trin. S Tone S Tmax. 80 80 lec Supply Current no Load mA Tam = 25C 0.3 0.6 0.3 0.8 Tmin. S Tamb S Tmax. 0.6 0.8 Vien | Input Common Mode Voltage Range Vv (Voc = 15V) Tamb = 25C #135 +14 Tmin. S Tamo S Tmax. : +13.5 +14 CMR | Common Mode Rejection Ratio (Rs < 10k) dB Tamb = 25C 80 100 80 100 Timin. $ Tamb < Tmax. 80 80 los Output Short-circuit Current (Vcc = +15V) 3 10 20 3 10 20 mA Vopp | Output Voltage Swing (Vcc = +15V, RL = 10kQ) Vv Tamb = 13 14 13 14 Tmnin. So < Twn 13 13 SR Slew Rate (Vcc = +15V, Vi = +10V, Ri = 10kQ, Vius Ci = 100pF, Tamp = 25C, unity gain) 0.15 0.15 t Rise Time (Vcc = +15V, Vi = +20mV, us Ri = 10kQ, C_ = 100pF, unity gain) 0.7 0.7 Koy | Overshoot (Voc = t15V, Vi = 20 mV, % Ri = 10kQ, C_ = 100pF, unity gain) 10 10 Ri Input Resistance (Vcc = 15V) 30 70 30 70 MQ GBP | Gain Bandwidth Product MHz (Vcc = t15V, Vi = 10mV, RL = 10kQ, CL = 100pF, f = 100kHz) 0.3 0.8 0.3 0.8 THD | Total Harmonic Distortion % (Vcc = +15V, f = 1kHz, Ay = 20dB, Ri = 10kQ, Vo = 2Vpp, CL = 100pF) 0.12 0.12 en | Equivalent Input Noise Voltage nv | (Voc = +15V, f = 1kHz, Rs = 100Q) 20 20 VHz DVio | Input Offset Voltage Drift pvPc Tmin. < Tamb $ Tmax. 3 15 6 30 Dio | Input Offset Current Drift pArc } Tmin. $ Tamb $ 25C 05 | 25 2 10LM108,A-LM208,A-LM308,A BASIC DIAGRAMS STANDARD COMPENSATION CIRCUIT ALTERNATIVE FREQUENCY COMPENSATION Ri R2 a, 0 @0 HO &on R3 et 8 Cs Improve rejection of power 100pF C.= 30pF supply noise BS oF 108-04.EPS 108-05.EPS TYPICAL APPLICATIONS STANDARD FEEDFORWARD SAMPLE AND HOLD Ri 10kQ input OT LM108A -O Output ~ 1pF s C2 30pF * Teflon, polyethyine or polycarbonate dielectric capacitor 108-06.EPS 108-07.EPS Gy $GS-THOMSON all sy, , MICROELECTRONICS 303ermoeey LM108,A-LM208,A-LM308,A FAST SUMMING AMPLIFIER INVERTING AMPLIFIER Power bnadwith : 250kHz Small signal bandwidth ; 3.5MHz Slew rate : 10V4is [ds i in addition to increasing speed the M2014 raises high and low frequency gain and eliminates thermal feedback * Used to compensate for large source resistances 106-08.EPS 108-09.EPS FOLLOWING AMPLIFIER NON-INVERTING AMPLIFIER RS" LM108 LM208 LM308 Output input * Used to compensate for large source resistances * Used to compensate for large s source resistances Input 108-10.EPS 108-11.EPS g k3f SSTLM108,A-LM208,A-LM308,A INPUT GUARDING Leakage currents are on the verge of causing trouble at +125C. The standard pin configuration of most IC op amps has the input pins adjacent to pins which are the supply potentials. Therefore, it is ad- visable to employ guarding to reduce the voltage dif- ference between the inputs and adjacent metal TYPICAL APPLICATION DIAGRAMS FAST SAMPLE AND HOLD 10pF 5kQ. Ld Input 2N4391 100kQ t y y 10pF Output 1N4148 T inF 6 Sample 108-12.EPS D/A CONVERTER USING LADDER NETWORK runs. A ten-lead pin circle is used, and the leads of the IC are formed so that the holes adjacent to the inputs are vacant when it is inserted in the board. The guard, which is a conductive ring surrounding the inputs, is connected to a low impedance point that is at the same potential as the inputs. FAST SUMMING AMPLIFIER WITH LOW INPUT CURRENT Input 108-13.EPS 5kQ 5kQ * Optional : reduces settling time 108-14.EPS ki S6s Tomson Wi 305