OP27

Data Sheet

Rev. H | Page 8 of 21

TYPICAL PERFORMANCE CHARACTERISTICS

100

90

80

70

60

50

40

30

0.01

0.1

1

10

100

FREQUENCY (Hz)

TEST TIME OF 10sec FURTHER

LIMITS LOW FREQUENCY

(<0.1Hz) GAIN

Figure 4. 0.1 Hz to 10 Hz p-p Noise Tester Frequency Response

10

9

8

7

6

5

4

3

2

1

1

10

100

1k

FREQUENCY (Hz)

I/F CORNER = 2.7Hz

TA = 25 C

VS = 15V

Figure 5. Voltage Noise Density vs. Frequency

INSTRUMENTATION

RANGE TO DC

AUDIO RANGE

TO 20kHz

741

OP27 I/F CORNER

I/F CORNER = 2.7Hz

I/F CORNER

LOW NOISE

AUDIO OP AMP

100

10

1

1

10

100

1k

FREQUENCY (Hz)

Figure 6. A Comparison of Op Amp Voltage Noise Spectra

10

1

0.1

0.01

100

1k

10k

100k

BANDWIDTH (Hz)

TA = 25 C

VS = 15V

Figure 7. Input Wideband Voltage Noise vs. Bandwidth (0.1 Hz to Frequency

Indicated)

100

10

1

100

1k

10k

SOURCE RESISTANCE ( )

TA = 25 C

VS = 15V

R2

R1

RS – 2R1

RESISTOR NOISE ONLY

AT 1kHz

AT 10Hz

Figure 8. Total Noise vs. Sourced Resistance

5

4

3

2

1

–50

0

–25

100

75

50

25

125

TEMPERATURE ( C)

AT 10Hz

AT 1kHz

VS = 15V

Figure 9. Voltage Noise Density vs. Temperature