©2001 Fairchild Semiconductor Corporation
www.fairchildsemi.com
Rev. 1.0.1
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 betw e en ampl ifiers: 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 w hich 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 wh ich minimize thermal coupling.
14-DIP
1
14-SOP
1
Internal Block Diagram
LM348/LM248
Quad Opera tional Amplifier
LM348/LM248
2
Schematic Diagram
(One Section Only)
Absolute Maximum Ratings
Parameter Symbol Value Unit
Supply Voltage VCC ±18 V
Differential Input Voltage 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
3
Electrical Characteristics
(VCC =15V, VEE= -15V, TA=25 °C, unless otherwise specified)
Note :
1. LM348: 0 ≤ TA ≤ +70 °C , LM248: -25 ≤ TA ≤ +85 °C
2. Guaranteed by design.
Parameter Symbol Conditions LM248 LM348 Unit
Min. Typ. Max. Min. Typ. Max.
Input Offset Voltage VIO RS≤10KΩ-16.0-16.0
mV
Note 1 - - 7.5 - - 7.5
Input Offset Current IIO - 4 50 - 4 50 nA
Note 1 - - 125 - - 100
Input Bias Current IBIAS - 30 200 - 30 200 nA
Note 1 - - 500 - - 400
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 GVRL≥2KΩ25 160 - 25 160 - V/mV
Note 115- -15- -
Channel Separation CS f = 1KHz to 20KHz - 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
Phase Margin (Note2) MPH GV = 1 - 60 - - 60 - Degree
Slew Rate (Note2) SR GV = 1 - 0.5 - - 0 .5 - V/µs
Output Short Circuit Current ISC - - 25 - - 25 - mA
Outp ut Vo lt age S win g VO(P-P) RL≥10KΩNote 1 ±12 ±13 - ±12 ±13 - V
RL≥2KΩ±10 ±12 - ±10 ±12 -
Common Mode Rejection
Ratio CMRR RS≥10KΩNote 1 70 90 - 70 90 - dB
Power Supply Rejection Ratio PSRR RS≥10KΩNote 1 77 96 - 77 96 - dB
LM348/LM248
4
Typical Performa n ce Cha ra cte ristic s
Figure 1. Supply Current vs Supply voltage Figure 2. Output Voltage Swing vs Supply voltage
Figure 3. Output voltage swing vs Source Current (mA) Figure 4. Output voltage swing vs Sink Current (mA)
Figure 5. Output Impedance vs Frequency Figur e 6. Common-mode Rejection Ratio vs Frequency
Supply Voltage (V) Supply Voltage (V)
Source Cur rent (mA ) Sink Cur re nt (mA)
Frequency (Hz) Frequency (Hz)
LM348/LM248
5
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. Undisto rted Output Voltage Swing vs Freq uency Fi gure 12. Inverting Large Signal P ulse Response
LM348/LM248
6
Typical Performance Characteristics (continued)
Figure 13. Input Noise Voltage And Noise Current vs Fre-
quency Figure 14. Positive Common Mode Input Voltage Limit
vs Positiue Supply Voltage
Figure 15. Negative Common.mode Input Voltage Limit vs
Negative Supply Voltage
LM348/LM248
7
Mechanical Dimensions
Package
6.40
±0.20
7.62
0.300
2.54
0.100
#1
#7 #8
#14
0.252
±0.008
0~15°
0.25
+0.10
–0.05
0.010
+0.004
–0.002
3.30
±0.30
0.130
±0.012
3.25
±0.20
0.128
±0.008
19.40
±0.20
0.764
±0.008
19.80
0.780 MAX
5.08
0.200
0.20
0.008
MAX
MIN
2.08
0.082
()
0.46
±0.10
0.018
±0.004
0.059
±0.004
1.50
±0.10
14-DIP
LM348/LM248
8
Mechanical Dimensions
Package
14-SOP
8.56
±0.20
0.337
±0.008
1.27
0.050
5.72
0.225
1.55
±0.10
0.061
±0.004
0.05
0.002
6.00
±0.30
0.236
±0.012
3.95
±0.20
0.156
±0.008
0.60
±0.20
0.024
±0.008
8.70
0.343 MAX
#1
#7 #8
0~8°
#14
0.47
0.019
()
1.80
0.071
MAX0.10
MAX0.004
MAX
MIN
+
0.10
-0.05
0.20+
0.004
-0.002
0.008
+
0.10
-0.05
0.406+
0.004
-0.002
0.016
LM348/LM248
9
Ordering Information
Product Number Package Operating Temperature
LM348N 14-DIP 0 ~ + 70oC
LM348M 14-SOP
LM248N 14-DIP -25 ~ + 85oC
LM248M 14-SOP
LM348/LM248
6/1/01 0.0m 001
Stock#DSxxxxxxxx
2001 Fairchild Semicond uctor Corporation
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