LM108/208/308 LM108A/208A/308A Operational Amplifiers Description: The 108, 208, 308, 108A, 208A and 308A monolithic operational amplifiers are functionally, elec- trically and pin-for-pin equivalents to the National LM108, LM208, LM308, LM108A, LM208A and LM308A. They are available in the hermetic TO-99 metal can, dual-in-line, and flat packages. Distinctive Characteristics: 100% reliability assurance testing including high-temperature bake, temperature cycling, centrifuge and fine leak hermeticity testing in compliance with MIL STD 883. Electrically tested and optically inspected dice for the assemblers of hybrid products. FUNCTIONAL DESCRIPTION These differential input, precision amplitiers provide tow input current and offset voltage competitive with FET and chopper stabilized amplifiers. They feature low power consumption over a supply voltage range of +2V to +20V. The amplifiers may be frequency compensated with a single external ca- pacitor and are pin-for-pin interchangeable with the 1014/ 201A/301A. The 108A, 208A, and 308A are high performance selections from the 108/208/308 amplifier family. FUNCTIONAL DIAGRAM Frequency Compensation Circults a 2 Ra INVERTING INVERTING INPUT INPUT Ay OUTPUT A 3 Ry NON INVERTING NON INVEATING UNPUT INPUT 1 cee TR, ) * C, = 30 pF LIC-670 ORDERING INFORMATION* Part Package Temperature Order Number Type Range Number Hermetic DIP Oto +70C LM308D TO-99 Oto +70C LM308H LM308 Molded DIP Oto +70C LM306N Dice Oto +70C L308 Leadiess Oto +70C LM308L Hermatic DIP Oto +70C LM308AD TO-99 Oto +70C LM308AH LM308A Molded DIP Oto +70C LM3G8AN Dice Oto +70C LD30BA Leadless Oto +70C LMS30BAL Hermetic DIP 25 to +85C LM208D LM208 TO-99 ~25 to +85C LM208H Leadless 25 to +88C LM208L. Hermetic DIP ~25 to +85C LM208AD LM208A TO-99 25 to +85C LM208AH Leadiess 25 to +85C LM206AL Hermetic DIP 55 to +125C LM108D LM108 TO-99 5 to +125C LM108H Dice 5 to + 125C D108 Leadless 56 to +125C LM108L Hermetic DIP 5& to + 126C LM108AD TO-99 55 to + 125C LM108AH LM1084 Dice 55 to + 125C LD108A Leadiess 55 to +125C LMtO08AL Also available with bum-in processing. To order add suffix B to part number. CONNECTION DIAGRAMS ~ Top Views Leadiess Chip-Pak L-20-1 a come. a quan INVERTING INPUTE] NONINVERTING CJ " Guano vq Flat Package F-10-1 NG . 10 [7 compa Guano 2 9 cones mente tha NON INVERTING SE ourpur quaao Cs see Notes: 1. On Metal Can, pin 4 is connected to case. 2. On DIP pin 7 is connected to bottom of package. 3. On Flat Package, pin 6 is connected to bottom of package. LiC-674 5-1 03930B-ANALM108/208/308 - LM108A/208A/308A MAXIMUM RATINGS Supply Voltage LM108, 208, 108A, 208A, +20V LM308, 308A 18V Internal Power Dissipation (Note 1) 7 ~ 500 mW Differential Input Current (Note 2) _ ~ +10mA input Voltage (Note 3) oO ~ a +15V Output Short-Circult Duration Indefinite Operating Temperature Range LM108, 108A LM208, 208A LM308, 308A Storage Temperature Range ~55C to +125C 25C to +85C 0C to +70C ~65C to +150C Lead Temperature (Soidering, 60 sec.) ee _ 300C ELECTRICAL CHARACTERISTICS Ta = 25C unless otherwise specified (see Note 4) LMt10e8 LM106A LM308 LM308A LM208 LM208A Parameters Test Conditions Min Typ Max Min Typ Max Min Typ Max Min Typ Max Units Input Offset Voltage 20 | 7.5 03 | 08 07 | 20 03 | 05 | mv Input Offset Current 0.2 1.0 0.2 1.0 0.05 | 0.2 0.05 | 02 nA Input Bias Current 15 7 15 7 0.8 2.0 0.8 2.0 nA Input Resistance 10 40 10 40 30 70 30 70 MQ Vg = +20V 03 0.6 0.3 0.6 Supply Current mA Vg = +18V 0.3 08 03 0.8 Vg = +15V Large Signal Voltage Gain Vout = +10V 25 300 80 300 50 300 80 300 VimV RL > 10k0 The Following Specifications Apply over the Operating Temperature Ranges input Offset Voltage 10 0.73 3.0 1.0 mv Input Offset Current 1.5 1.6 0.4 04 nA Average Temperature Coefficient of Input 6.0 3.0 1.0 5.0 3.0 15 1.0 6.0 | pVPC Offset Voltage Average Temperature Coefficient of Input 2 10 2.0 10 0.5 25 05 2.5 |pArc Offset Current input Bias Current 10 10 3.0 3.0 nA Vg = +15V Large Signal Voitage Gain Vout = 10V 16 60 25 40 VimV Ry = 10kD Input Voltage Range Vg = +15V +13.5 +135 213.5 +13.5 v Common Mode Rejection so | 100 96 | 110 as | 100 96 | 110 dB Ratio Supply Voltage Rejection so | 96 96 | 110 80 | 96 96 | 110 dB Ratio i Vg = =15V +14] + + +13 | + * Output Voltage Swing Fy, = 10k0? #13 | +14 13 14 +13 | +14 +13 | +14 Vv Vg = +20V 0.15 | 04 0.15 | 04 T = Tg Max Supply Current y tev mA s= = , 1 6 | oO, T= Ta Max 0.6 o 0. 08 Notes: 1. Derate Metal Can package at 6.8mW/C for operation at ambient temperatures above 75C and the Dual In-Line package at 9mW/C for operation at ambient temperatures above 96C. 2. 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. 3. For supply voltages less than +15V, the maximum input voltage is equal to the supply voltage. 4. Unless otherwise specified, these specifications apply for supply voltages from +5 to +20V for the 108, 208, 108A and 208A and from +5 to +18V for the 308 and 308A. 5-2LM108/208/308 - LM108A/208A/308A SUPPLY REJECTION-dB INPUT CURRENT-nA OUTPUT SWING-1V OUTPUT (MPEDANCE-& Input Currents 2.0 16 1.0 os 028 0.20 0.15 0.10 oO -85-35 -15 5 25 45 65 85 106 125 TEMPERATURE -C Power Supply Rejection , NEGATIVE SUPPLY Cy = 100 pF c= 30 Ta = 25C Vg = tis Ayn 20 100 tk 10k 100k FREQUENCY -Hz 1M 10M Output Swing Vg = 215 Qo 2 4 6 8 OUTPUT CURRENT-tmA Closed Loop Output Impedance = Cye0 yy = 1000, Cy = 30 pF Ay = 1, Cy = 30 pF , Ta = 28C four 7 21 ma =t15V 10 100 tk 60k 100k FREQUENCY -Hz 10M TYPICAL PERFORMANCE CURVES Maximum Drift Error ORIFT ERROR ~ pV/C STas 208/208A: -25C ST,gS s6C S0B/208A: OC ST 70C 1M 10M 100 M INPUT RESISTANCE 2 100k Input Nolse Voltage ny & 8 > z zt z a S a w Qo g 2 9 5 4 s 8 10 100 1 Ok 100k FREQUENCY - Hz Supply Current 600 500 <q i : 5 400 zg < x eo = 200 w Q g > = = 200 5 Tat g 100 Ta = 70C Tp = 128C 5 10 15 2 SUPPLY VOLTAGE-#V Large Signal Frequency Response T= =2t5V 2 > * ; 9 a z < 5 8 E : e 8 1k 10k 100k 1M FREQUENCY -Hz Maximum Offset Error 108/108A: 56C ST, < -%CSTaS arc Oc<tas 70C EQUIVALENT INPUT OFFSET VOLTAGE mv 1M 10M INPUT RESISTANCE ~ 2 100 Voltage Gain An OCTas ac Tat 1 aX 128C = t= 100 Hz 20 5 10 15 SUPPLY VOLTAGE-2V Open Loop Frequency Response 120 180 100 C= 3, C,* 1005 80 og =30 g 60 9 9 40 i g or z 20 6 G, = 100 pF a =30 0 -20 S 1 10 100 1k 10k 100% 7M 10M FREQUENCY-#Hz Voltage Follower Pulse Response Vg = 215 V Cp = 30 pF 0 20 40 60 80 100 120140 180 TIME -ys LIC-675 5-3LM108/208/308 - LM108A/208A/308A ADDITIONAL APPLICATION INFORMATION GUARDING Extra care must be taken in the assembly of printed circuit boards to take full advantage of the low input currents of the 108 amplifier. Boards must be thoroughly cleaned with TCE or alcohol and blown dry with compressed air. After cleaning, the boards should be coated with epoxy or silicone rubber to prevent con- tamination. Even with Properly cleaned and coated boards, leakage currents may cause trouble at 125C, particularly since the input pins are adjacent to pins that are at supply potentials. This leakage can be significantly reduced by using guarding to fower the voltage difference between the inputs and adjacent metai runs. Input guarding of the 8-lead TO-99 package is accomplished by using a 10-lead pin circle, with the leads of the device formed so that the holes adjacent to the Inputs are empty 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 approximately the same voltage as the inputs. Leakage currents from high-voltage pins are then absorbed by the guard. The pin configuration of the duai-in-line package is designed to facilitate guarding, since the pins adjacent to the inputs are not used (this is different from the standard 741 and 101A pin configuration.) COMPENSATION ve [. . A OUTPUT BOTTOM VIEW Board layout for Input Guarding with TO-99 package. APPLICATIONS a Connection of Input Guards iNPUT wy ouTPut Lutes o OUTPUT INPUT . INVERTING AMPLIFIER FOLLOWER NON INVERTING AMPLIFIER LIC-671 Lic-672 Lic-673 . NOTE: Ri Rez . *Use to compensate for large source resistances. ai a; Must be LOW impedance METALLIZATION AND PAD LAYOUT COMP A" COMP B" vt INPUT (-) OUTPUT INPUT (+) vw DIE SIZE 0.046" X 0.068 5-4