OP27A, OP27C, OP27E, OP27G

OP37A, OP37C, OP37E, OP37G

LOW-NOISE HIGH-SPEED PRECISION OPERATIONAL AMPLIFIERS

SLOS100B – FEBRUARY 1989 – REVISED AUGUST 1994

2–14

POST OFFICE BOX 655303

POST OFFICE BOX 1443

OP27A, OP27E, OP37A, OP37E

EQUIVALENT INPUT NOISE VOLTAGE

vs

TOTAL SUPPLY VOLTAGE

VCC + – VCC – – Total Supply Voltage – V

RS = 20 Ω

BW = 1 Hz

TA = 25°C

f = 10 Hz

20

15

10

5

0

010

20

30

40

f = 1 kHz

– 50

– 25

0

25

50

75

100

125

TA – Free-Air Temperature – °C

OP27A, OP27E, OP37A, OP37E

EQUIVALENT INPUT NOISE VOLTAGE

vs

FREE-AIR TEMPERATURE

VCC

± = ±15 V

RS = 20 Ω

BW = 1 Hz

5

4

3

2

1

f = 10 Hz

f = 1 kHz

Figure 24

Figure 25

OP27A, OP27E, OP37A, OP37E

EQUIVALENT INPUT NOISE VOLTAGE

vs

FREQUENCY

1

10

100

1000

f – Frequency – Hz

EQUIVALENT INPUT NOISE CURRENT

vs

FREQUENCY

10

1

0.1

f – Frequency – Hz

1/f Corner = 140 Hz

10

9

8

7

6

5

4

3

2

1

1/f Corner = 2.7 Hz

10

100

1 k

10 k

VCC

± = ±15 V

RS = 20 Ω

BW = 1 Hz

TA = 25°C

VCC

± = ±15 V

BW = 1 Hz

TA = 25°C

Figure 26

Figure 27

† Data for temperatures below – 25

°C and above 85°C are applicable to the OP27A, OP27C, OP37A, and OP37C only.