www.fairchildsemi.com LM348/LM248 Quad Operational Amplifier Features Description • • • • • • • • • • TheLM348/LM248 is a true quad LM741. 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 LM741 operational amplifier. In addition the total supply current for all four amplifiers is comparable to the supply current of a single LM741 type OP Amp. Other features include input offset currents and input bias current which are much less than those of a standard LM741. Also, excellent isolation between amplifiers has been achieved by independently biasing each amplifier and using layout techniques which minimize thermal coupling. LM741 OP Amp operating characteristics Low supply current drain Class AB output stage no crossover distortion Pin compatible with the LM324/LM248 Low input offset voltage : 1mV Typ. Low input offset current : 4nA Typ. Low input bias current : 30nA Typ. Gain bandwidth (unity gain): 1.0MHz Typ. High degree of isolation between amplifiers: 120dB Overload protection for inputs and outputs 14-DIP 1 14-SOP 1 Internal Block Diagram Rev. 1.0.1 ©2001 Fairchild Semiconductor Corporation LM348/LM248 Schematic Diagram (One Section Only) Absolute Maximum Ratings Parameter Supply Voltage Differential Input Voltage 2 Symbol Value Unit VCC ±18 V VI(DIFF) 36 V Input Voltage VI ±18 V Output Short Circuit Duration - Continuous - Operating Temperature LM348 LM248 TOPR 0 ~ +70 -25 ~ +85 °C Storage Temperature TSTG - 65~ +150 °C LM348/LM248 Electrical Characteristics (VCC =15V, VEE= -15V, TA=25 °C, unless otherwise specified) Parameter Symbol Input Offset Voltage VIO Input Offset Current IIO Conditions RS≤10KΩ Note 1 Note 1 LM248 Min. LM348 Typ. Max. Min. Typ. Max. - 1 6.0 - 1 6.0 - - 7.5 - - 7.5 - 4 50 - 4 50 - - 125 - - 100 - 30 200 - 30 200 - - 500 - - 400 Unit mV nA nA Input Bias Current IBIAS Input Resistance RI - 0.8 2.5 - 0.8 2.5 - MΩ Supply Current (all Amplifiers) ICC - - 2.4 4.5 - 2.4 4.5 mA Large Signal Voltage Gain GV 25 160 - 25 160 - 15 - - 15 - - Channel Separation CS - 120 - - 120 - dB Common Mode Input Voltage Range VI(R) Note 1 ±12 - - ±12 - - V Small Signal Bandwidth BW GV = 1 - 1.0 - - 1.0 - MHz MPH GV = 1 - 60 - - 60 - Degree Slew Rate (Note2) SR GV = 1 - 0.5 - - 0.5 - V/µs Output Short Circuit Current ISC mA Phase Margin (Note2) Note 1 RL≥2KΩ Note 1 f = 1KHz to 20KHz - - 25 - - 25 - ±12 ±13 - ±12 ±13 - RL≥2KΩ ±10 ±12 - ±10 ±12 - RL≥10KΩ Note 1 V/mV Output Voltage Swing VO(P-P) Common Mode Rejection Ratio CMRR RS≥10KΩ Note 1 70 90 - 70 90 - dB Power Supply Rejection Ratio PSRR RS≥10KΩ Note 1 77 96 - 77 96 - dB V Note : 1. LM348: 0 ≤ TA ≤ +70 °C , LM248: -25 ≤ TA ≤ +85 °C 2. Guaranteed by design. 3 LM348/LM248 Typical Performance Characteristics Supply Voltage (V) Figure 1. Supply Current vs Supply voltage Source Current (mA) Figure 3. Output voltage swing vs Source Current (mA) Frequency (Hz) Figure 5. Output Impedance vs Frequency 4 Supply Voltage (V) Figure 2. Output Voltage Swing vs Supply voltage Sink Current (mA) Figure 4. Output voltage swing vs Sink Current (mA) Frequency (Hz) Figure 6. Common-mode Rejection Ratio vs Frequency LM348/LM248 Typical Performance Characteristics (continued) Figure 7. Open Loop Frequency Response Figure 8. Bode Plot Figure 9. Large Signal Pulse Response Figure 10. Small Signal Pulse Response Figure 11. Undistorted Output Voltage Swing vs Frequency Figure 12. Inverting Large Signal Pulse Response 5 LM348/LM248 Typical Performance Characteristics (continued) Figure 13. Input Noise Voltage And Noise Current vs Frequency Figure 15. Negative Common.mode Input Voltage Limit vs Negative Supply Voltage 6 Figure 14. Positive Common Mode Input Voltage Limit vs Positiue Supply Voltage LM348/LM248 Mechanical Dimensions Package 2.08 ) 0.082 14-DIP 7.62 0.300 3.25 ±0.20 0.128 ±0.008 5.08 MAX 0.200 1.50 ±0.10 0.059 ±0.004 #8 2.54 0.100 #7 19.40 ±0.20 0.764 ±0.008 #14 19.80 MAX 0.780 #1 0.46 ±0.10 0.018 ±0.004 ( 6.40 ±0.20 0.252 ±0.008 0.20 0.008 MIN 3.30 ±0.30 0.130 ±0.012 +0.10 0.25 –0.05 0~15° +0.004 0.010 –0.002 7 LM348/LM248 Mechanical Dimensions Package 14-SOP MIN #8 0.60 ±0.20 0.024 ±0.008 8 MAX0.10 MAX0.004 1.80 MAX 0.071 5.72 0.225 8° 3.95 ±0.20 0.156 ±0.008 0~ +0.10 0.20 -0.05 +0.004 0.008 -0.002 6.00 ±0.30 0.236 ±0.012 1.27 0.050 #7 +0.10 0.406 -0.05 +0.004 0.016 -0.002 #14 8.70 MAX 0.343 #1 8.56 ±0.20 0.337 ±0.008 ( 0.47 ) 0.019 1.55 ±0.10 0.061 ±0.004 0.05 0.002 LM348/LM248 Ordering Information Product Number Package LM348N 14-DIP LM348M 14-SOP LM248N 14-DIP LM248M 14-SOP Operating Temperature 0 ~ + 70oC -25 ~ + 85oC 9 LM348/LM248 DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD’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 FAIRCHILD 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 (c) 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 of the user. 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com 6/1/01 0.0m 001 Stock#DSxxxxxxxx 2001 Fairchild Semiconductor Corporation