Quad Micropower
Operational Amplifier
a
OP420
PIN CONNECTIONS
FEATURES
Low Supply Current: 200 A Max @ VS = 5 V
Single-Supply Operation: 5 V to 30 V
Dual-Supply Operation: 2.5 V to 15 V
Low Input Offset Voltage: 500 V Typ
Low Input Offset Voltage Drift: 5 V/؇C Typ
High Common-Mode Input Range: V– to (V+ – 1.5 V)
High CMRR: 100 dB Typ
1
2
3
4
5
6
7
8
16
OUT A
–IN A
+IN A
V+
OUT D
1
2
3
4
5
6
7
14 OUT 4
13 –IN 4
12 +IN 4
11 V–
OUT 1
–IN 1
+IN 1
V+
+
+
+
+
15 –IN D
14
13
12
11
10
9
+IN D
V–
+IN B
–IN B
OUT B
N.C.
+IN C
–IN C
OUT C
N.C.
+IN 2
–IN 2
OUT 2
10 +IN 3
9
8
–IN 3
+
+
+
+
High Open-Loop Gain: 1100 V/mV Typ
LM 148 Pinout
OUT 3
14-Pin Hermetic DIP
(Y-Suffix)
GENERAL DESCRIPTION
16-Pin SOL
(S-Suffix)
The OP420 quad micropower operational amplifier is a single-
chip quad patterned after the OP20 precision micropower single
operational amplifier. A Darlington PNP input stage allows the
input common-mode voltage to include V–. The wide input
range combined with low power supply drain (~40 µA/section at
5 V) provides a unique solution for designs requiring high func-
tional density and portable operation. Applications include
2-wire transmitters for process control loops, battery-operated
remote-line filters, signal preconditioning amplifiers, and a
variety of multiple-gain block arrays.
14-Pin Epoxy DIP
(P-Suffix)
3
2
1
20 19
4
18
17
16
15
14
+IN1
+IN4
5
NC
NC
V–
6
7
8
V+
NC
NC
+IN3
+IN2
9
10 11 12 13
OP420CRC/883
20-Lead LCC
(RC-Suffix)
V+
Q11
Q28
Q12
Q3
Q4
–IN
–IN
Q2
Q26
Q1
OUTPUT
Q9
Q10
Q8
Q27
Q7
C1
Q29
Q6
Q5
Q13
Q33
V–
Figure 1. Simplified Schematic (1/4 Shown)
REV. A
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may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
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© Analog Devices, Inc., 2002