Fairchild Semiconductor KA248, KA348 Datasheet
KA248/KA348
Quad Operational Amplifier
www.fairchildsemi.com
Features
• KA741 OP Amp operating characteristics
• Low supply current drain
• Class AB output stage no crossover distortion
• Pin compatible with the KA324 & KA3403
• 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 bet ween amplifiers: 120dB
• Overload protection for inputs and outputs
Description
The KA248/KA348 is a true quad KA741. 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
KA741 operational amplifier. In addition the total supply
current for all four amplifiers is comparable to the supply
current of a single KA741 type OP Amp. Other features
include input offset currents and input bias current which are
much less than those of a standard KA741. 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
Internal Block Diagram
©2001 Fairchild Semiconductor Corporation
1
Rev. 1.0.1
KA248/KA348
Schematic Diagram
(One Section Only)
Absolute Maximum Ratings
Parameter Symbol Value Unit
Supply Voltage V
Differential Input Voltage V
Input Voltage V
Output Short Circuit Duration - Continuous Operating Temperature
KA248
KA348
Storage Temperature T
CC
I(DIFF)
I
T
OPR
STG
±18 V
36 V
±18 V
- 25 ~ +85
0~ +70
- 65~ +150 °C
°C
°C
2
Electrical Characteristics
(VCC =15V, VEE= -15V, TA=25
°C, unless otherwise specified)
KA248/KA348
Parameter Symbol Conditions
Input Offset Voltage V
Input Offset Current I
Input Bias Current I
BIAS
Input Resistance R
Supply Current (all Amplifiers) I
Large Signal Voltage Gain G
IO
IO
CC
R
≤10KΩ -16.0-16.0
S
NOTE 1 - - 7.5 - - 7.5
NOTE 1 - - 125 - - 100
NOTE 1 - - 500 - - 400
I
- 0.8 2.5 - 0.8 2.5 - MΩ
- - 2.4 4.5 - 2.4 4.5 mA
R
≥2KΩ 25 160 - 25 160 -
V
L
NOTE 1 15 - - 15 - -
KA248 KA348
Min. Typ. Max. Min. Typ. Max.
- 4 50 - 4 50
- 30 200 - 30 200
Unit
mV
nA
nA
V/mV
Channel Separation CS f = 1KHz to 20KHz - 120 - - 120 - dB
Common Mode Input
Voltage Range
V
I(R)
Small Signal Bandwidth BW G
Phase Margin (Note2) MPH G
Slew Rate (Note2) SR G
Output Short Circuit Current I
Output Volt ag e Swin g V
SC
O(P-P)
Common Mode Rejection Ratio CMRR R
Power Supply Rejection Ratio PSRR R
NOTE 1 ±12 - - ±12 - - V
= 1 - 1.0 - - 1.0 - MHz
V
= 1 - 60 - - 60 - Degree
V
= 1 - 0.5 - - 0.5 - V/µs
V
- - 25 - - 25 - mA
R
≥10KΩ NOTE 1 ±12 ±13 - ±12 ±13 -
L
≥2KΩ±10 ±12 - ±10 ±12 -
R
L
≥10KΩ NOTE 1 70 90 - 70 90 - dB
S
≥10KΩ NOTE 1 77 96 - 77 96 - dB
S
V
Note :
1. KA348: 0 ≤ T
2. Guaranteed by design.
≤ +70
A
°C , KA248: -25 ≤ T
≤ +85
A
°C
3
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