OP227 datasheet(6/16 Pages) AD | Dual, Low Noise, Low Offset Instrumentation Operational Amplifier

6 page

REV. A

OP227

–6–

FREQUENCY – Hz

100

TA = 25 C

l/f CORNER

= 2.7Hz

VS = 15V

TPC 3. Voltage Noise Density vs.

Frequency

SOURCE RESISTANCE –

100

10k

RESISTOR NOISE ONLY

TA = 25 C

VS = 15V

AT 10Hz

AT 1kHZ

RS = 2R1

TPC 6. Total Noise vs. Source

Resistance

FREQUENCY – Hz

100

741

l/f CORNER

LOW NOISE

AUDIO

OP AMP

l/f CORNER

OP227

l/f CORNER

2.7 Hz

INSTRUMENTATION

RANGE,TO DC

AUDIO RANGE

TO 20 kHz

TPC 4. Comparison of Op Amp Voltage

Noise Spectra

TEMPERATURE – C

–50

–25

100

125

AT 10Hz

AT 1kHz

VS = 15V

TPC 7. Voltage Noise Density vs.

Temperature

BANDWIDTH – Hz

100

0.1

0.01

10k

100k

TA = 25 C

VS = 15V

TPC 5. Input Wideband Noise vs. Band-

width (0.1 Hz to Frequency Indicated)

FREQUENCY – Hz

10.0

1.0

0.1

100

10k

l/f CORNER

= 140Hz

TPC 8. Current Noise Density vs.

Frequency

100

1 SEC / DIV

0.1Hz TO 10Hz PEAK-TO-PEAK NOISE

120

–40

–80

–120

TPC 2. Low Frequency Noise

(Observation Must Be Limited to 10

Seconds to Ensure 0.1 Hz Cutoff)

0.1 F

100k

D.U.T.

VOLTAGE GAIN

= 50,000

5 F

OP12

24.3k

0.1 F

100k

4.3k

2.35 F

23.5 F

SCOPE

X 1

RIN = 1M

110k

BACK-TO-BACK

10 F

BACK-TO-BACK

4.7 F

BACK-TO-BACK

47 F

TPC 1. Voltage Noise Test Circuit

(0.1 Hz to 10 Hz p-p)

–Typical Performance Characteristics

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OP200	Dual Low Offset Low Power Operational Amplifier	1 2 3 4 5 More	Analog Devices
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