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LM348/LM248
Quad Operational Amplifier
Features
* * * * * * * * * * 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
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.
14-DIP
1
14-SOP
1
Internal Block Diagram
Rev. 1.0.1
(c)2001 Fairchild Semiconductor Corporation
LM348/LM248
Schematic Diagram
(One Section Only)
Absolute Maximum Ratings
Parameter Supply Voltage Differential Input Voltage Input Voltage Output Short Circuit Duration Operating Temperature LM348 LM248 Storage Temperature Symbol VCC VI(DIFF) VI TOPR TSTG Value 18 36 18 Continuous 0 ~ +70 -25 ~ +85 - 65~ +150 Unit V V V C C
2
LM348/LM248
Electrical Characteristics
(VCC =15V, VEE= -15V, TA=25 C, unless otherwise specified) Parameter Input Offset Voltage Input Offset Current Input Bias Current Input Resistance Supply Current (all Amplifiers) Large Signal Voltage Gain Channel Separation Common Mode Input Voltage Range Small Signal Bandwidth Phase Margin (Note2) Slew Rate (Note2) Output Short Circuit Current Output Voltage Swing Common Mode Rejection Ratio Power Supply Rejection Ratio Symbol VIO IIO IBIAS RI ICC GV CS VI(R) BW MPH SR ISC VO(P-P) CMRR PSRR RL10K RL2K RS10K Note 1 RS10K Note 1 RL2K Note 1 f = 1KHz to 20KHz Note 1 GV = 1 GV = 1 GV = 1 Note 1 Conditions RS10K Note 1 Note 1 Note 1 LM248 Min. 0.8 25 15 12 12 10 70 77 Typ. Max. Min. 1 4 30 2.5 2.4 160 120 1.0 60 0.5 25 13 12 90 96 6.0 7.5 50 125 200 500 4.5 0.8 25 15 12 12 10 70 77 LM348 Typ. Max. 1 4 30 2.5 2.4 160 120 1.0 60 0.5 25 13 12 90 96 6.0 7.5 50 100 200 400 4.5 Unit mV nA nA M mA V/mV dB V MHz Degree V/s mA V dB dB
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)
Supply Voltage (V)
Figure 1. Supply Current vs Supply voltage
Figure 2. Output Voltage Swing vs Supply voltage
Source Current (mA)
Sink Current (mA)
Figure 3. Output voltage swing vs Source Current (mA)
Figure 4. Output voltage swing vs Sink Current (mA)
Frequency (Hz)
Frequency (Hz)
Figure 5. Output Impedance vs Frequency
Figure 6. Common-mode Rejection Ratio vs Frequency
4
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 14. Positive Common Mode Input Voltage Limit vs Positiue Supply Voltage
Figure 15. Negative Common.mode Input Voltage Limit vs Negative Supply Voltage
6
LM348/LM248
Mechanical Dimensions
Package
14-DIP
6.40 0.20 0.252 0.008
19.80 MAX 0.780
19.40 0.20 0.764 0.008
#7
#8
7.62 0.300
3.25 0.20 0.128 0.008
0.20 0.008 MIN
5.08 MAX 0.200
3.30 0.30 0.130 0.012
0.25 -0.05
+0.10
0~15
0.010 -0.002
+0.004
2.54 0.100
0.46 0.10 0.018 0.004
1.50 0.10 0.059 0.004
#1
#14
(
2.08 ) 0.082
7
LM348/LM248
Mechanical Dimensions
Package
14-SOP
MIN 1.55 0.10 0.061 0.004 0.05 0.002
#1
#14
8.70 MAX 0.343
8.56 0.20 0.337 0.008
#7 6.00 0.30 0.236 0.012
#8
1.80 MAX 0.071
+0.10 0.20 -0.05 +0.004 0.008 -0.002
3.95 0.20 0.156 0.008
0.60 0.20 0.024 0.008
5.72 0.225
8
0~
8
MAX0.10 MAX0.004
1.27 0.050
+0.10 0.406 -0.05 +0.004 0.016 -0.002
(
0.47 ) 0.019
LM348/LM248
Ordering Information
Product Number LM348N LM348M LM248N LM248M Package 14-DIP 14-SOP 14-DIP 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.
www.fairchildsemi.com 6/1/01 0.0m 001 Stock#DSxxxxxxxx 2001 Fairchild Semiconductor Corporation
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.

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