Low Voltage, Micropower,

Quad Operational Amplifier

OP490

Rev. E

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FEATURES

Single/dual-supply operation

1.6 V to 36 V

±0.8 V to ±18 V

Single-supply operation; input and output

voltage ranges include ground

Low supply current: 80 μA maximum

High output drive: 5 mA minimum

Low offset voltage: 1.0 mV maximum

High open-loop gain: 800 V/mV typical

Industry-standard quad pinouts

FUNCTIONAL BLOCK DIAGRAMS

OUT A

1

–IN A

2

+IN A

3

V+

4

OUT D

14

–IN D

13

+IN D

12

V–

11

+IN B

5

–IN B

6

OUT B

7

+IN C

10

–IN C

9

OUT C

8

TOP VIEW

(Not to Scale)

OP490

Figure 1. 14-Lead Plastic DIP

(P-Suffix)

OUT A

1

–IN A

2

+IN A

3

V+

4

OUT D

16

–IN D

15

+IN D

14

V–

13

+IN B

5

–IN B

6

OUT B

NC

7

+IN C

12

–IN C

11

OUT C

NC

NC = NO CONNECT

10

8

9

TOP VIEW

(Not to Scale)

OP490

Figure 2. 16-Lead SOIC

(S-Suffix)

GENERAL DESCRIPTION

The OP490 is a high performance micropower quad op amp

that operates from a single supply of 1.6 V to 36 V or from dual

supplies of ±0.8 V to ±18 V. The input voltage range includes

the negative rail allowing the OP490 to accommodate input

signals down to ground in single-supply operation. The output

swing of the OP490 also includes ground when operating from

a single supply, enabling zero-in, zero-out operation.

The quad OP490 draws less than 20 μA of quiescent supply

current per amplifier, but each amplifier is able to deliver over

5 mA of output current to a load. Input offset voltage is under

0.5 mV. Gain exceeds over 400,000 and CMR is better than

90 dB. A PSRR of under 5.6 μV/V minimizes offset voltage

changes experienced in battery-powered systems.

The quad OP490 combines high performance with the space

and cost savings of quad amplifiers. The minimal voltage and

current requirements of the OP490 make it ideal for battery and

solar-powered applications, such as portable instruments and

remote sensors.