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LM348/LM248
Quad Operational Amplifier
Features
Description
?
LM741 OP Amp operating characteristics
TheLM348/LM248 is a true quad LM741. It consists of four
?
Low supply current drain
independent, high-gain, internally compensated, low power
?
Class AB output stage no crossover distortion
operational amplifiers which have been designed to provide
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Pin compatible with the LM324/LM248
functional characteristics identical to those of the familiar
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Low input offset voltage : 1mV Typ.
LM741 operational amplifier. In addition the total supply
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Low input offset current : 4nA Typ.
current for all four amplifiers is comparable to the supply
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Low input bias current : 30nA Typ.
current of a single LM741 type OP Amp. Other features
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Gain bandwidth (unity gain): 1.0MHz Typ.
include input offset currents and input bias current which are
?
High degree of isolation between amplifiers: 120dB
much less than those of a standard LM741. Also, excellent
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Overload protection for inputs and outputs
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
?2001 Fairchild Semiconductor Corporation
LM348/LM248
Schematic Diagram
(One Section Only)
Absolute Maximum Ratings
Parameter
Symbol
Value
Unit
?18
V
Supply Voltage
VCC
Differential Input Voltage
VI(DIFF)
36
V
?18
Input Voltage
VI
V
Output Short Circuit Duration
-
Continuous
-
Operating Temperature
?C
LM348
TOPR
0 ~ +70
LM248
-25 ~ +85
?C
Storage Temperature
TSTG
- 65~ +150
2
LM348/LM248
Electrical Characteristics
(VCC =15V, VEE= -15V, TA=25 ?C, unless otherwise specified)
LM248
LM348
Parameter
Symbol
Conditions
Unit
Min.
Typ. Max. Min.
Typ. Max.
RS10K
-
1
6.0
-
1
6.0
Input Offset Voltage
VIO
mV
Note 1
-
-
7.5
-
-
7.5
-
4
50
-
4
50
nA
Input Offset Current
IIO
Note 1
-
-
125
-
-
100
-
30
200
-
30
200
nA
Input Bias Current
IBIAS
Note 1
-
-
500
-
-
400
M
-
0.8
2.5
-
0.8
2.5
-
Input Resistance
RI
Supply Current (all Amplifiers)
ICC
-
-
2.4
4.5
-
2.4
4.5
mA
RL2K
25
160
-
25
160
-
Large Signal Voltage Gain
GV
V/mV
Note 1
15
-
-
15
-
-
Channel Separation
CS
f = 1KHz to 20KHz
-
120
-
-
120
-
dB
Common Mode Input
?12
?12
Note 1
-
-
-
-
V
VI(R)
Voltage Range
Small Signal Bandwidth
BW
GV = 1
-
1.0
-
-
1.0
-
MHz
GV = 1
-
60
-
-
60
-
Degree
Phase Margin (Note2)
MPH
V/?s
Slew Rate (Note2)
SR
GV = 1
-
0.5
-
-
0.5
-
-
-
25
-
-
25
-
mA
Output Short Circuit Current
ISC
RL10K
?12
?13
?12
?13
Note 1
-
-
Output Voltage Swing
VO(P-P)
V
RL2K
?10
?12
?10
?12
-
-
Common Mode Rejection
RS10KNote 1
CMRR
70
90
-
70
90
-
dB
Ratio
RS10KNote 1
77
96
-
77
96
-
dB
Power Supply Rejection Ratio
PSRR
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
Sink Current (mA)
Source Current (mA)
Figure 4. Output voltage swing vs Sink Current (mA)
Figure 3. Output voltage swing vs Source 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 Fre-
Figure 14. Positive Common Mode Input Voltage Limit
quency
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
#1
#14
#7
#8
7.62
3.25 ?0.20
0.20
0.300
0.008 MIN
0.128 ?0.008
3.30 ?0.30
5.08
MAX
0.130 ?0.012
0.200
+0.10
0.25 ?0.05
+0.004
0~15?
0.010 ?0.002
7
LM348/LM248
Mechanical Dimensions
Package
14-SOP
0.05
MIN
0.002
1.55 ?0.10
0.061 ?0.004
#14
#1
#8
#7
6.00 ?0.30
1.80
MAX
0.236 ?0.012
0.071
3.95 ?0.20
0.156 ?0.008
5.72
0.225
0.60 ?0.20
0.024 ?0.008
8
LM348/LM248
Ordering Information
Product Number
Package
Operating Temperature
LM348N
14-DIP
0 ~ + 70oC
LM348M
14-SOP
LM248N
14-DIP
-25 ~ + 85oC
LM248M
14-SOP
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
2. A critical component in any component of a life support
which, (a) are intended for surgical implant into the body,
device or system whose failure to perform can be
or (b) support or sustain life, and (c) whose failure to
reasonably expected to cause the failure of the life support
perform when properly used in accordance with
device or system, or to affect its safety or effectiveness.
instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of the
user.
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2001 Fairchild Semiconductor Corporation