LT118A/LT318A LM118/LM318 Operational Amplifier FEATURES DESCRIPTION = Guaranteed 1.0mV Max. Input Offset Voltage The LT118A is an improved version of the industry stand- = Guaranteed 100,000 Min. Gain ard LM118. The LT118A features lower input offset volt- = Guaranteed 50V/us Slew Rate age, lower input offset currents, higher gain and higher = Guaranteed 20nA Max. Input Offset Current common mode and power supply rejection. Because of = 15MHz Bandwidth these enhancements, the LT118A will improve the accu- = Unity Gain Stable racy of most applications. Unlike many wideband amplifi- ers, the LT118A is unity gain stable and has a slew rate of S0V/us. When used in inverting amplifier applications, feedforward compensation can be used to achieve slew APPLICATIONS rates in excess of 150V/us. Linear Technology Ea Corporations advanced processing techniques make the LT118A an ideal choice for high speed applications. = Wideband Amplifiers # High Frequency Absolute Value Circuits = D/A Converter Amplifiers = Fast Integrators Voltage Follower Voltage Follower Pulse Response 10pF 5k OUTPUT Sk 3 SV/DIV INPUT TIME 0.5ys/DIV. LI Wee 2-311LT118A/LT318A LM118/LM318 ABSOLUTE MAXIMUM RATINGS PACKAGE/ORDER INFORMATION Supply Voltage ...............00 0c eee ee +20V TOP VIEW Differential Input Current (Note1).......... + 10mA ORDER PART NUMBER Input Voltage (Note 2)................ 005. + 20V Output Short Circuit Duration............. Indefinite LTH18AH Operating Temperature Range LM118H LTH18A/LM118...........00.. 55C to 125C (T318AH LTS18A/LM318 .............2-06. 0C to 70C - LM318H (CASE) Storage Temperature Range METAL CAN H PACKAGE AllDevices .................. 65C to 150C Lead Temperature (Soldering, 10sec.)........ 300C TOP VIEW : LT118AJ8 come 1[1| 8] COMP 2 LM118J8 -IN[2| nth > LT318AJ8 +n G3 [s] our LM318J8 vy 5] comes LT318AN8 HERMETIC DIP J8 PACKAGE LM318N8 PLASTIC DIP N8 PACKAGE ELECTRICAL CHARACTERISTICS (note 3) SYMBOL | PARAMETER CONDITIONS win fiyP omax | MIN. Type oMax. | UNITS Vos Input Offset Voltage 2 4 mV 6 mV los input Offset Current 6 50 nA 100 nA Ig Input Bias Current 120 250 nA e 500 500 nA Rin Input Resistance 3 MQ Ay Large Signal Voltage Gain Vg = & 15V, Voy7 = + 10V, RL = 2kQ 200 V/mv el V/mvV SR Slew Rate Vg= + 15V, Ay=1 70 V/us GBW Gain Bandwidth Product Vs = + 15V 15 MHz Output Voltage Swing Vg= + 15V, Ry = 2kQ @ii12 +13 +12 +13 _V Input Voltage Range Vg = + 15V @),+11.5 #11.5 V Is Supply Current 5 8 mA Ta = 125C 45 7 mA CMRR- | Common Mode Rejection e 80 100 dB Ratio PSRR Power Supply Rejection Ratio e 70 80 dB 2-312 LO WenLT118A/LT318A LM118/LM318 ELECTRICAL CHARACTERISTICS (note 3) LT3i8A LM318 SYMBOL | PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS Vos input Offset Voltage Oe OB ke 4 10 mv e El Qe 15 mv los Input Offset Current See 20 30 200 nA Of 30. 750 nA lp Input Bias Current 1506 250 150 500 nA @ e500: 750 nA Rin input Resistance 0.5 3 0.5 3 MQ Ay Large Signal Voltage Gain Vg = + 15V, Voyt= + 10V, Ry = 2k0 100 <': 500 20 200 V/mv @} 100 on 20 V/mvy SR Slew Rate Vg= + 15V, Ay=1 50 70 50 70 V/ps GBW Gain Bandwidth Product Vg= + 15V 15 15 MHz Output Voltage Swing Vg= + 15V, Ry =2kQ @)+12 13 +12 13 V Input Voltage Range Vo= + 15V @) +115 211.5 V Is Supply Current 5 10 5 10 mA CMRR | Common Mode Rejection @ | 8B. c> 100 70 100 dB Ratio 2 UBB RS PSRR Power Supply Rejection Ratio @| 2 862.100 65 80 dB The @ denotes those specifications which apply over the full operating temperature range. The shaded electrical specifications indicate those parameters which have been improved or guaranteed test limits provided for the first time. Note 1: The inputs are shunted with back-to-back zeners for overvoltage equal to the supply voltage. protection. Excessive current will flow if a differentia! voltage greater than 5V is applied to the inputs. Note 2: For supply voltages less than + 15V, the maximum input voltage is Note 3: These specifications apply for + 5V <Vs>< 20V. The power sup- plies must be bypassed with a 0.1yF or greater disc capacitor within 4 inches of the device. TYPICAL PERFORMANCE CHARACTERISTICS Input Current 200 150 100 50 INPUT CURRENT (nA) }on & DH &w LY 55 -35 -15 5 TEMPERATURE (C) 25 45 65 LINCAR TECHNOLOGY = ~ = _ tN nN w ow an oa a oa a = = o VOLTAGE GAIN (dB) 105 100 95 85 105 125 5 10 SUPPLY VOLTAGE (+) Voltage Gain 15 120 100 bo 60 40 POWER SUPPLY REJECTION (dB) 20 1 Power Supply Rejection S POSITIVE \ |_ NEGA SUPPLY Ne TIVE 0 100 1k 10k = 10 FREQUENCY (Hz) 0k 1M 10M 2-313LT118A/LT318A LM118/LM318 a TYPICAL PERFORMANCE CHARACTERISTICS Large Signal Frequency Open Loop Frequency Response Response Unity Gain Bandwidth 14 Tan deee 120 7,25 24 Vg= +15V Vg= +15V 12 s 100 s 995 22 z 20 = 10 = 80 2 = Vg= +15 #4 a S = o z 3 18 2 8 = 60 C = = ws > 2 i6 5 6 = 40 = a Vs5= +10V > 5 e z 5 s s 3 \ So 4 20 = 3 5 2 = 2 a 10 0 20 0 0.5m 1M 2M 5M 10M 20M 50M 10 100 1k 10k 100k 1M 10M 100M -55-35-15 5 25 45 65 85 105 125 FREQUENCY (Hz) FREQUENCY (Hz) TEMPERATURE (C) Large Signal Frequency Open Loop Frequency Response Response Voltage Follower Slew Rate 130 Ty=25C 120 Vs= +15V Vg= +15V Rg=Ry=10k2 100 225 120 C= 5pF > 80 180 -o 110 POSITIVE SLEW 4 S 5 8 g Z at 135 = S100 = < aoa 2 on ry _ 5 = 40 eee _ S 3 7 NEGATIVE SLEW 20 45 ~ 80 FEEDFORWARD 0 0 70 GAIN 20 60 1M 3M 10M 30M 100M 10 100 1k 610k 100k 1M 10M 100M -55 -35 -15 5 25 45 65 85 105 125 FREQUENCY (Hz) FREQUENCY (Hz) TEMPERATURE (C) Feedforward Compensation for Pulse Response of Slew Rates of 150V/us Feedforward Inverter 2pF _ Sk 3k 5V/DIV 5k INPUT AAV PUT 2 5k 0 0.4 0.8 1.6 2.0 2.4 TIME-0.2u8/01 BALANCE CIRCUIT NECESSARY FOR INCREASED SLEW RATE 2-314 LI WeLT118A/LT318A LM118/LM318 TYPICAL PERFORMANCE CHARACTERISTICS input Noise Voltage Common Mode Rejection Supply Current 3000 120 r 8 Rg =2k2 1000 Tase'e @ 100 g 300 = 80 aN = = 5 5 y = > 2 30 5 2 = = > = n S 5 10 20 N 3 0 4 10 100 tk 10k 100k 100 1k 10k 100k 1M 10M 5 10 15 20 FREQUENCY (Hz) FREQUENCY (Hz} SUPPLY VOLTAGE (+V) Ea Closed Loop Output Impedance Current Limiting LT118A Input Current Vg= +15V 300 Ta=25C 200 2 - S 4 = 100 Pp 3 2 z a a = 0 = 5 2 - e > 2 a = 100 ~ _ 3 Yin 200 = = - 1 v | | | 300 1 10 100 1k 10k 100k 1M 0 5 10 15 20 2 30 -9 -6 -3 0 3 6 9 FREQUENCY (Hz) OUTPUT CURRENT (mA) DIFFERENTIAL INPUT VOLTAGE (V) Overcompensation for Offset Balancing Isolating Large Capacitive Loads increased Stability WA @ OUTPUT +L Cy LT Wee 9-315LT118A/LT318A LM118/LM318 SETTLING TIME CIRCUITS Settling Time Test Circuit > OUTPUT *IMPROVES SETTLING TIME Alternate Compensation for Improved Settling Time yt IMPROVES SETTLING TIME Settling Time 5/DIV OUTPUT VOLTAGE Smv/DIV 0.2us/DIV Settling Time sv/olv OUTPUT VOLTAGE Smv/OlV 0.2us/DIV APPLICATIONS INFORMATION Because of their wider bandwidth, the LT118A and LM118 operational amplfiers require more application care than most general purpose low frequency amplifiers. One of the most critical requirements is that power supplies should be bypassed with a 0. 1,F (or larger) disc ceramic capacitor within an inch of the device. Also, stray capaci- tance at either the input or output can cause oscillation. While input capacitance can be compensated by placing a Capacitor across the feedback resistor, load capacitance must be minimized or isolated as shown. Even the 50pF input capacitance of a 1X scope probe can alter the response of the device. ee 2-316 Settling time, an important parameter in many high speed amplifier applications, is difficult to measure and opti- mize. Settling time is very application dependent and is influenced by external components, layout and the amplifier. In general, the settling time to 0.01% can be minimized by using a Circuit similar to that shown. In ad- dition to the compensation network shown, a capacitor is needed across the feedback resistor to minimize ringing. Power supply bypassing can also affect settling time. The amplifier has low power supply rejection ratio at high fre- quencies, so transients and ringing on the supply leads can appear at the output. Large (22yF) solid tantalum Capacitors are preferred to minimize supply aberrations. LI WRLT118A/LT318A LM118/LM318 Precision Inverting Amplifier INPUT 4 Rin Sane Ry ;'* 10k* 2 ok 10pF $ +_ |__++ == 1000pF g 10k 15V FULL POWER BANDWIDTH =2MHz = SLEW RATE =50V/,sec SETTLING (10V STEP) =12us TO 0.01% BIAS CURRENT DC=30pA OFFSET ORIFT =0.3.V/C *1% METAL FILM OFFSET VOLTAGE = 30,.V SCHEMATIC DIAGRAM nH + +H AIS R13 R14 - 18k 180K $1.8k we = 01 R22 100pF a ae 5 R23 Ri2 smk> | on cH WW aig $* 18k z soa Mo20 ; Sass fo a . c2 , 30pF 022 R32 it > soa a q 023 024 ~Wre-{ 6] a2 R33 Aas 340 Rg 04 tk , 1000 025 +e A 63 06 ba 026 | | 031 Hf 3 . ABS ; 1 son > = > ab Yon , a16 [2] at f 2 3F ot ws org WF 260 u hs. 5000 HK$ ag 027 , 08 , aro a} ata 2231" aso R10g Z RG A26 R26 A239 6.5k> > AT 720 1.35k > 1k > 500 ra LY LINEAR 2-3 1 1LT118A/LT318A LM118/LM318 PACKAGE DESCRIPTION H Package J8 Package Metal Can 8 Lead-Hermetic DIP 0.355 ~ 0.370 017 (s0rr 9.388) mo om 0.305 0.335. 8 5 (7.747 8.503) 0.040 DIA 0.2200.310 (1.016) 0.050 I (5.588 7.874) MAX (1.270) 0.165 0.185 el 4 t MAX (rar 4m Sor SEATING = i PLANE t = PANGE 0,500 - 0.750 0.055, PLANE (72 70 19.05) (1.397) 0.010 0.945 ff} ( (0 MAX {0.254 1.143) rl | 0.016 - 0.021 0.405 (0.406 0.533) 0200 (10.29) TYP MAX (g-0a0) 0.015 0.060 0.005 Ne max (0.981 1.524} iz L X Ws *__0.027~-0.045 MIN 0.027-0.084 4 (0.686 1,143) i (0.686 0.868) t h q " | \ 0.150 " i 0.125 - 0.200. (2.810) " 1% (3.175 5.080) MN a uw U7 u 4 o.030a.070 4 ~/ g-15 yell _0.008- 0.015 (0. at . (0.762 1.778) (0.203 0.381} 0,100 [i TYP ; eee 0.014 aret028 0.290 0.320 0.120-0.160 BSC* (0.356 0.584) 36 bso (7.366 8.128) (3.0484.064) Rao te INSULATING STANDOFF NOTE: DIMENSIONS IN INCHES UNLESS OTHERWISE NOTED NOTE: DIMENSIONS IN INCHES *LEADS WITHIN 0.007 OF TRUE POSITION (TP) AT GAUGE PLANE Tymax Hq Oe Tymax Oa 150C 150C/W | 45C/W 150C 100C /W N8 Package 8 Lead Plastic ooo 4 1 | 0.240-0.280 q (6.096 7.112) 5 B | Se a | 0.040, 0.060 ir.016) MAX (1.524) sa 0.3700.400 ea (8.400 10.16) . 0.005 sake MIN - (0.127) e 745) MIN 7 0.155 0.175 eee tl y 1 f o15o130 4 0.115 0.145, 1 \ (3.175 3.302) (2.921 oe tl i b u <_ 9.030 0.06 030-0. oa / e_4n0 0.008 - 0.095 i 1.100 10 7621.524) one | (0.203 0.381) TP TYP (2.540) |__ 0.0149.023 0.2900.310 Tye 10.356 0.584) a6 a. 584) (7.366 7.878) NOTE: DIMENSIONS IN INCHES UNLESS OTHERWISE NOTED *LEADS WITHIN 0.007 OF TRUE POSITION (TP) AT GAUGE PLANE : Tjmax Op 100C 130C /W as 2-318 LI ITIEAR