REV. A

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a

OP420

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

www.analog.com

Fax: 781/326-8703

© Analog Devices, Inc., 2002

Quad Micropower

Operational Amplifier

PIN CONNECTIONS

GENERAL DESCRIPTION

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.

–IN

–IN

Q1

Q3

Q4

C1

Q5

Q6

Q2

Q7

Q9

Q11

Q10

Q13

Q8

Q12

Q33

Q26

Q27

Q29

V–

OUTPUT

V+

Q28

Figure 1. Simplified Schematic (1/4 Shown)

FEATURES

Low Supply Current: 200

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

High Open-Loop Gain: 1100 V/mV Typ

LM 148 Pinout

OUT A

–IN A

+IN A

V+

+IN B

–IN B

OUT B

N.C.

OUT D

–IN D

+IN D

V–

+IN C

–IN C

OUT C

N.C.

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

+

+

+

+

16-Pin SOL

(S-Suffix)

9

10

11

12

13

+IN1

NC

V+

NC

+IN2

+IN4

NC

V–

NC

+IN3

3

2

1

20

19

4

5

6

7

8

18

17

16

15

14

OP420CRC/883

20-Lead LCC

(RC-Suffix)

OUT 1

–IN 1

+IN 1

V+

+IN 2

–IN 2

OUT 2

OUT 4

–IN 4

+IN 4

V–

+IN 3

–IN 3

OUT 3

14

13

12

11

10

9

8

1

3

2

4

5

6

7

+

+

+

+

14-Pin Hermetic DIP

(Y-Suffix)

14-Pin Epoxy DIP

(P-Suffix)