LM148/LM149 Series Quad 741 Op Amp LM148/LM248/LM348 Quad 741 Op Amps LM149/LM349 Wide Band Decompensated (AV (MIN) e 5) General Description Features The LM148 series is a true quad 741. It consists of four independent, high gain, internally compensated, low power operational amplifiers which have been designed to provide functional characteristics identical to those of the familiar 741 operational amplifier. In addition the total supply current for all four amplifiers is comparable to the supply current of a single 741 type op amp. Other features include input offset currents and input bias current which are much less than those of a standard 741. Also, excellent isolation between amplifiers has been achieved by independently biasing each amplifier and using layout techniques which minimize thermal coupling. The LM149 series has the same features as the LM148 plus a gain bandwidth product of 4 MHz at a gain of 5 or greater. The LM148 can be used anywhere multiple 741 or 1558 type amplifiers are being used and in applications where amplifier matching or high packing density is required. Y Y Y Y Y Y Y Y Y Y 741 op amp operating characteristics Low supply current drain 0.6 mA/Amplifier Class AB output stageno crossover distortion Pin compatible with the LM124 Low input offset voltage 1 mV Low input offset current 4 nA Low input bias current 30 nA Gain bandwidth product LM148 (unity gain) 1.0 MHz 4 MHz LM149 (AV t 5) High degree of isolation between amplifiers 120 dB Overload protection for inputs and outputs Schematic Diagram TL/H/7786 - 1 *1 pF in the LM149 C1995 National Semiconductor Corporation TL/H/7786 RRD-B30M115/Printed in U. S. A. LM148/LM149 Series Quad 741 Op Amp February 1995 Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. (Note 4) LM148/LM149 LM248 LM348/LM349 g 22V g 18V g 18V Supply Voltage g 44V g 36V g 36V Differential Input Voltage Output Short Circuit Duration (Note 1) Continuous Continuous Continuous Power Dissipation (Pd at 25 C) and Thermal Resistance (ijA), (Note 2) Molded DIP (N) Pd 750 mW ijA 100 C/W Cavity DIP (J) Pd 1100 mW 800 mW 700 mW iJA 110 C/W 110 C/W 110 C/W 150 C 110 C 100 C Maximum Junction Temperature (TjMAX) b 55 C s TA s a 125 C b 25 C s TA s a 85 C 0 C s TA s a 70 C Operating Temperature Range b 65 C to a 150 C b 65 C to a 150 C b 65 C to a 150 C Storage Temperature Range 300 C 300 C Lead Temperature (Soldering, 10 sec.) Ceramic 300 C Lead Temperature (Soldering, 10 sec.) Plastic 260 C Soldering Information Dual-In-Line Package Soldering (10 seconds) 260 C 260 C 260 C Small Outline Package Vapor Phase (60 seconds) 215 C 215 C 215 C Infrared (15 seconds) 220 C 220 C 220 C See AN-450 ``Surface Mounting Methods and Their Effect on Product Reliability'' for other methods of soldering surface mount devices. ESD tolerance (Note 5) 500V 500V 500V Electrical Characteristics (Note 3) Parameter Conditions LM148/LM149 Min LM248 LM348/LM349 Typ Max Min Typ Max Min Typ Max Units Input Offset Voltage TA e 25 C, RS s 10 kX 1.0 5.0 1.0 6.0 1.0 6.0 Input Offset Current TA e 25 C 4 25 4 50 4 50 nA Input Bias Current TA e 25 C 30 100 30 200 30 200 nA Input Resistance TA e 25 C 0.8 Supply Current All Amplifiers TA e 25 C, VS e g 15V 2.5 2.4 Large Signal Voltage Gain TA e 25 C, VS e g 15V VOUT e g 10V, RL t 2 kX Amplifier to Amplifier Coupling TA e 25 C, f e 1 Hz to 20 kHz (Input Referred) See Crosstalk Test Circuit Small Signal Bandwidth LM148 Series TA e 25 C LM149 Series Phase Margin LM148 Series (AV e 1) TA e 25 C LM149 Series (AV e 5) 60 Slew Rate LM148 Series (AV e 1) TA e 25 C LM149 Series (AV e 5) 0.5 2.0 Output Short Circuit Current TA e 25 C 25 Input Offset Voltage RS s 10 kX 50 0.8 3.6 160 2.5 2.4 25 0.8 4.5 160 2.5 2.4 25 mV MX 4.5 mA 160 V/mV b 120 b 120 b 120 dB 1.0 1.0 1.0 MHz 4.0 4.0 4.0 MHz 60 60 60 degrees 60 60 degrees 0.5 0.5 V/ms 2.0 2.0 V/ms 25 25 mA 6.0 7.5 7.5 mV Input Offset Current 75 125 100 nA Input Bias Current 325 500 400 nA 2 Electrical Characteristics (Note 3) (Continued) Parameter LM148/LM149 Conditions Min Large Signal Voltage Gain VS e g 15V, VOUT e g 10V, RL l 2 kX Output Voltage Swing Typ Max 25 LM248 Min Typ LM348/LM349 Max 15 g 13 g 12 g 12 g 10 Min Typ 15 g 13 g 12 V/mV VS e g 15V, RL e 10 kX RL e 2 kX g 12 g 10 Input Voltage Range VS e g 15V g 12 Common-Mode Rejection Ratio RS s 10 kX 70 90 70 90 70 90 dB Supply Voltage Rejection RS s 10 kX, g 5V s VS s g 15V 77 96 77 96 77 96 dB g 12 g 12 g 10 Units Max g 13 g 12 V V g 12 V Note 1: Any of the amplifier outputs can be shorted to ground indefinitely; however, more than one should not be simultaneously shorted as the maximum junction temperature will be exceeded. Note 2: The maximum power dissipation for these devices must be derated at elevated temperatures and is dicated by TjMAX, ijA, and the ambient temperature, TA. The maximum available power dissipation at any temperature is Pd e (TjMAX b TA)/ijA or the 25 C PdMAX, whichever is less. Note 3: These specifications apply for VS e g 15V and over the absolute maximum operating temperature range (TL s TA s TH) unless otherwise noted. Note 4: Refer to RETS 148X for LM148 military specifications and refer to RETS 149X for LM149 military specifications. Note 5: Human body model, 1.5 kX in series with 100 pF. Cross Talk Test Circuit TL/H/7786 - 6 Crosstalk e b 20 log eE OUT (dB) 101 c eOUT TL/H/7786 - 7 VS e g 15V Application Hints a resistor should be placed between the output (and feedback connection) and the capacitance to reduce the phase shift resulting from the capacitive loading. The output current of each amplifier in the package is limited. Short circuits from an output to either ground or the power supplies will not destroy the unit. However, if multiple output shorts occur simultaneously, the time duration should be short to prevent the unit from being destroyed as a result of excessive power dissipation in the IC chip. As with most amplifiers, care should be taken lead dress, component placement and supply decoupling in order to ensure stability. For example, resistors from the output to an input should be placed with the body close to the input to minimize ``pickup'' and maximize the frequency of the feedback pole which capacitance from the input to ground creates. A feedback pole is created when the feedback around any amplifier is resistive. The parallel resistance and capacitance from the input of the device (usually the inverting input) to AC ground set the frequency of the pole. In many instances the frequency of this pole is much greater than the expected 3 dB frequency of the closed loop gain and consequently there is negligible effect on stability margin. However, if the feedback pole is less than approximately six times the expected 3 dB frequency a lead capacitor should be placed from the output to the input of the op amp. The value of the added capacitor should be such that the RC time constant of this capacitor and the resistance it parallels is greater than or equal to the original feedback pole time constant. The LM148 series are quad low power 741 op amps. In the proliferation of quad op amps, these are the first to offer the convenience of familiar, easy to use operating characteristics of the 741 op amp. In those applications where 741 op amps have been employed, the LM148 series op amps can be employed directly with no change in circuit performance. The LM149 series has the same characteristics as the LM148 except it has been decompensated to provide a wider bandwidth. As a result the part requires a minimum gain of 5. The package pin-outs are such that the inverting input of each amplifier is adjacent to its output. In addition, the amplifier outputs are located in the corners of the package which simplifies PC board layout and minimizes package related capacitive coupling between amplifiers. The input characteristics of these amplifiers allow differential input voltages which can exceed the supply voltages. In addition, if either of the input voltages is within the operating common-mode range, the phase of the output remains correct. If the negative limit of the operating common-mode range is exceeded at both inputs, the output voltage will be positive. For input voltages which greatly exceed the maximum supply voltages, either differentially or common-mode, resistors should be placed in series with the inputs to limit the current. Like the LM741, these amplifiers can easily drive a 100 pF capacitive load throughout the entire dynamic output voltage and current range. However, if very large capacitive loads must be driven by a non-inverting unity gain amplifier, 3 Typical Performance Characteristics Supply Current Input Bias Current Voltage Swing Positive Current Limit Negative Current Limit Output Impedance Common-Mode Rejection Ratio Open Loop Frequency Response Bode Plot LM148 Bode Plot LM149 Large Signal Pulse Response (LM148) Large Signal Pulse Response (LM149) TL/H/7786 - 3 4 Typical Performance Characteristics (Continued) Small Signal Pulse Response (LM148) Small Signal Pulse Response (LM149) Undistorted Output Voltage Swing Gain Bandwidth Slew Rate Inverting Large Signal Pulse Response (LM149) Inverting Large Signal Pulse Response (LM148) Input Noise Voltage and Noise Current Positive Common-Mode Input Voltage Limit TL/H/7786 - 4 Negative Common-Mode Input Voltage Limit TL/H/7786 - 5 5 Typical ApplicationsLM148 One Decade Low Distortion Sinewave Generator fe 1 R4R5 c 0K, K e 2qR1C1 R3 #r 1 DS a J 1 1 a , R4 R5 rDS & fMAX e 5 kHz, THD s 0.03% # RON VGS (/2 VP 1b TL/H/7786 - 8 J R1 e 100k pot. C1 e 0.0047 mF, C2 e 0.01 mF, C3 e 0.1 mF, R2 e R6 e R7 e 1M, R3 e 5.1k, R4 e 12X, R5 e 240X, Q e NS5102, D1 e 1N914, D2 e 3.6V avalanche diode (ex. LM103), VS e g 15V A simpler version with some distortion degradation at high frequencies can be made by using A1 as a simple inverting amplifier, and by putting back to back zeners in the feedback loop of A3. Low Cost Instrumentation Amplifier VOUT e 2 # R1 1 J , V 2R a TL/H/7786 - 9 a S b 3V s VIN CM s VS b 3V, VS e g 15V R e R2, trim R2 to boost CMRR 6 Typical ApplicationsLM148 (Continued) Low Drift Peak Detector with Bias Current Compensation Adjust R for minimum drift D3 low leakage diode D1 added to improve speed VS e g 15V TL/H/7786 - 10 Universal State-Variable Filter Tune Q through R0, For predictable results: fO Q s 4 c 104 Use Band Pass output to tune for Q V(s) N S0o e (s) , D(s) e S2 a a 0o2 VIN(s) D(s) Q NHP(s) e S2 HOHP, NBP(s) e fo e 1 2q 0R5 0t1t2 , t 1 R 2q # R t t J R6 fNOTCH e HOLP e 1 Q i e RiCi , Q e H L 1 2 (/2 TL/H/7786 - 11 b s0O HOBP , HOHP e # NLP e 0o2 HOLP. l l 1 a R4 R3 a R4 R0 1 a R6 R5 l R6 t1 (/2 J # R5 t J 2 1 a R6 l R5 1 a R4 l R3 a R4 l R0 , HOBP e 1 a R3 l R0 a R3 l R4 1 a R3 l R0 a R3 l R4 1 a R5 l R6 1 a R3 l R0 a R3 l R4 7 Typical ApplicationsLM148 (Continued) A 1 kHz 4 Pole Butterworth TL/H/7786 - 12 Use general equations, and tune each section separately Q1stSECTION e 0.541, Q2ndSECTION e 1.306 The response should have 0 dB peaking A 3 Amplifier Bi-Quad Notch Filter TL/H/7786 - 13 Qe 0 R8 R1C1 1 c , fo e R7 0R3C2R2C1 2q Necessary condition for notch: 0 R8 1 1 c , fNOTCH e R7 0R2R3C1C2 2q R1 1 e R6 R4R7 0 R6 R3R5R7C1C2 Ex: fNOTCH e 3 kHz, Q e 5, R1 e 270k, R2 e R3 e 20k, R4 e 27k, R5 e 20k, R6 e R8 e 10k, R7 e 100k, C1 e C2 e 0.001 mF Better noise performance than the state-space approach. 8 Typical ApplicationsLM148 (Continued) A 4th Order 1 kHz Elliptic Filter (4 Poles, 4 Zeros) R1C1 e R2C2 e t RE 1CE 1 e RE 2CE 2 e tE TL/H/7786 - 14 fC e 1 kHz, fS e 2 kHz, fp e 0.543, fZ e 2.14, Q e 0.841, fE P e 0.987, fE Z e 4.92, QE e 4.403, normalized to ripple BW 1 R6 1 1 RH 1 1 a R4 l R3 a R4 l R0 R6 RE 6 1 a RE 4 l RE 0 c , Qe c , fZ e c fP e , QE e 2q R5 t 2 q RL t 1 a R6 l R5 R5 R5 1 a RE 6 l RE 5 a RE 6 l RP 0 RP e RH RL RH a RL 0 # J 0 0 Use the BP outputs to tune Q, QE , tune the 2 sections separately R1 e R2 e 92.6k, R3 e R4 e R5 e 100k, R6 e 10k, R0 e 107.8k, RL e 100k, RH e 155.1k, RE 1 e RE 2 e 50.9k, RE 4 e RE 5 e 100k, RE 6 e 10k, RE 0 e 5.78k, RE L e 100k, RE H e 248.12k, RE f e 100k. All capacitors are 0.001 mF. Lowpass Response TL/H/7786 - 15 9 Typical ApplicationsLM149 Minimum Gain to Insure LM149 Stability The LM149 as a Unity Gain Inverter TL/H/7786-16 VOUT e ACL(S) e VIN VO A b4 #1 a 5 AOL(s) J TL/H/7786 - 17 VOUT e ACL(s) e VIN j b4 j g 5 VOS VO VIN e 0 Power BW e 40 kHz A # b1 1a 6 AOL(s) J j b1 j g 5 VOS VIN e 0 Small Signal BW e G BW/5 Small Signal BW e G BW/5 Non-inverting-Integrator Bandpass Filter TL/H/7786 - 18 For stability purposes: R7 e R6/4, 10R6 e R5, CC e 10C 1 R5 1 RQ R5 RQ c fO e , Qe , HoBP e 2q R6 RC R R6 RIN 0 fO(MAX), QMAX e 20 kHz, 10 0 Better Q sensitivity with respect to open loop gain variations than the state variable filter. R7, CC added for compensation 10 Typical ApplicationsLM149 (Continued) Active Tone Control with Full Output Swing (No Slew Limiting at 20 kHz) TL/H/7786 - 19 VS e g 15V, VOUT(MAX) e 9.1 VRMS, fMAX e 20 kHz, THD s 1% Duplicate the above circuit for stereo fL e 1 1 , fLB e 2qR2C1 2qR1C1 1 1 , fHB e 2qR5C3 2q(R1 a 2R7) C3 Max Bass Gain j (R1 a R2)/R1 Max Treble Gain j (R1 a 2R7)/R5 fH e as shown: fL j 32 Hz, fLB j 320 Hz fH j 11 kHz, fHB j 1.1 Hz Triangular Squarewave Generator TL/H/7786 - 20 fe K c VIN 2VI s 25V, V a e Vb, VS e g 15V , K e R2/RE 2 , a 8V C1R1 K Use LM125 for g 15V supply The circuit can be used as a low frequency V/F for process control. Q1, Q3: KE4393, Q2, Q4: P1087E, D1-D4 e 1N914 11 12 *C2 e 6 pF for LM149 bo2 e 144 TL/H/7786 - 21 For more details, see IEEE Journal of Solid-State Circuits, Vol. SC-9, No. 6, December 1974 IS e 8 c 10b16 bo1 e 112 LM148, LM149, LM741 Macromodel for Computer Simulation TL/H/7786 - 22 Typical Simulation Connection Diagram Dual-In-Line Package TL/H/7786 - 2 Top View Order Number LM148J, LM148J/883, LM149J, LM149J/883, LM248J, LM348J, LM348M, LM348N or LM349N See NS Package Number J14A, M14A or N14A LM148J is available per JM38510/11001 Physical Dimensions inches (millimeters) Ceramic Dual-In-Line Package (J) Order Number LM148J, LM148J/883, LM149J, LM149J/883, LM248J or LM348J NS Package Number J14A 13 LM148/LM149 Series Quad 741 Op Amp Physical Dimensions inches (millimeters) (Continued) S.O. Package (M) Order Number LM348M NS Package Number M14A Molded Dual-In-Line Package (N) Order Number LM348N or LM349N NS Package Number N14A LIFE SUPPORT POLICY NATIONAL'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. National Semiconductor Corporation 1111 West Bardin Road Arlington, TX 76017 Tel: 1(800) 272-9959 Fax: 1(800) 737-7018 2. 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