KA248/KA348
QUAD OPERATIONAL AMPLIFIER
QUAD OPERATIONAL AMPLIFIERS
The KA248/KA348 is a true quad KA741. It consists of four independ-
ent, 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
14 SOP
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 Type.
Low input offset current-4nA Type.
Low input bias current-30nA Type.
Gain bandwidth product for KA348 (unity gain)-1.0MHz Type.
High degree of isolation between amplifiers-120dB
Overload protection for inputs and outputs
BLOCK DIAGRAM
ORDERING INFORMATION
Device
KA348
KA348D
KA248
KA248D
Package
14 DIP
14 SOP
14 DIP
14 SOP
Operating Temperature
Î
-25 ~ +85
Î
0 ~ +70
SCHEMATIC DIAGRAM
(One Section Only)
KA248/KA348
QUAD OPERATIONAL AMPLIFIER
ABSOLUTE MAXIMUM RATINGS (T
A
= 25
Characteristic
Supply Voltage
Differential Input Voltage
Input Voltage
Output Short Circuit Duration
Operating Temperature KA248
KA348
Storage Temperature
T
STG
T
OPR
Symbol
V
CC
V
I(DIFF)
V
I
Î
)
Value
ä
18
ä
36
ä
18
Unit
V
V
V
Continuous
- 25 ~ +85
0~ +70
- 65~ +150
Î
Î
Î
ELECTRICAL CHARACTERISTICS
(V
CC
=15V, V
EE
= -15V, T
A
=25
Characteristic
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
Slew Rate
Output Short Circuit Current
Output Voltage Swing
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Î
, unless otherwise specified)
Symbol
V
IO
I
IO
I
BIAS
R
I
I
CC
G
V
CS
V
I(R)
BW
MPH
SR
I
SC
V
O(P.P)
CMRR
PSRR
R
L
R
S
Test Conditions
KA248
Min
Typ
1
NOTE 1
4
NOTE 1
30
NOTE 1
0.8
2.5
2.4
25
NOTE 1
15
160
120
4.5
25
15
Max
6.0
7.5
50
125
200
500
0.8
2.5
2.4
160
V/mV
120
dB
V
1.0
60
0.5
MHz
Degress
V/
4.5
30
4
Min
KA348
Typ
1
Max
6.0
7.5
50
100
200
400
nA
nA
M
Unit
mV
10K
<
<
2K
<
mA
f = 1KHz to 20KHz
NOTE 1
G
V
= 1
G
V
= 1
G
V
= 1
ä
12
ä
12
1.0
60
0.5
I
s
10K
<
R
2K
<
R
10K
<
R
10K
<
R
L
L
S
S
NOTE 1
NOTE 1
NOTE 1
ä
12
ä
13
ä
10
ä
12
70
77
90
96
25
ä
12
ä
13
0
ä
12
70
77
90
96
25
mA
V
dB
dB
NOTE 1
KA348: 0
T
A
+70
KA248: -25
T
A
+85
Î
Î
KA248/KA348
QUAD OPERATIONAL AMPLIFIER
TYPICAL PERFORMANCE CHARACTERISTICS
Fig. 1 SUPPLY CURRENT
Fig. 2 VOLTAGE SWING
SUPPLY VOLTAGE (
ä
V)
SUPPLY VOLTAGE (
ä
V)
Fig. 3 SOURCE CURRENT LIMIT
Fig. 4 SINK CURRENT LIMIT
OUTPUT SOURCE CURRENT (mA)
Fig. 5 OUTPUT IMPEDANCE
OUTPUT SINK CURRENT (mA)
Fig. 6 COMMON-MODE REJECTION RATIO
FREQUENCY (HZ)
FREQUENCY (Hz)
KA248/KA348
Fig. 7 OPEN LOOP FREGUENCV RESPONSE
QUAD OPERATIONAL AMPLIFIER
Fig. 8 BODE PLOT
Fig. 9 LARGE SIGNAL PULSE RESPONSE
Fig. 10 SMALL SIGNAL PULSE RESPONSE
Fig. 11 UNDISTORTED OUTPUT VOLTAGE SWING
Fig. 12 INVERTING LARGE SIGNAL
PULSE RESPONSE
KA248/KA348
QUAD OPERATIONAL AMPLIFIER
Fig. 13 INPUT NOISE VOLTAGE AND
NOISE CURRENT
Fig. 14 POSITIVE COMMON MODE INPUT
VOLTAGE LIMIT
FREQUENCY (Hz)
Fig. 15 NEGATIVE COMMON.MODE INPUT
VOLTAGE LIMFY
POSITIVE SUPPLY (V)
NEGATIVE SUPPLY VOLTS(V)
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