OP297AZ datasheet(5/16 Pages) AD

Part #	OP297AZ

Description	Dual Low Bias Current Precision Operational Amplifier

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8/21/97 4:00 PM

OP297

–5–

REV. D

INPUT OFFSET VOLTAGE (

µV)

400

300

200

100

0

–100 –80 –60 –40 –20 0

20

40 60 80 100

1200 UNITS

TA = +25°C

VS = ±15V

VCM = 0V

Figure 4. Typical Distribution of Input

Offset Voltage

TEMPERATURE (

°C)

60

40

20

0

20

–40

–60

–75 –50 –25

0

25

50

75

100 125

VS = ±15V

VCM = 0V

IB–

IB+

IOS

Figure 7. Input Bias, Offset Current

vs. Temperature

SOURCE RESISTANCE (

Ω)

10

100

1k

10k

100k

1M

10M

10000

1000

100

10

BALANCED OR UNBALANCED

VS = ±15V

VCM = 0V

–55

°C

≤ TA ≤ 125°C

TA = +25°C

Figure 10. Effective Offset Voltage

vs. Source Resistance

Typical Performance Characteristics–

INPUT BIAS CURRENT (pA)

–100 –80 –60 –40 –20

0

20 40

60 80 100

250

200

150

100

50

0

1200

UNITS

TA = +25°C

VS = ±15V

VCM = 0V

Figure 5. Typical Distribution of Input

Bias Current

COMMON-MODE VOLTAGE (VOLTS)

60

40

20

0

–20

–40

–60

–15

–10

–5

0

5

10

15

TA = +25°C

VS = ±15V

IB–

IB+

IOS

Figure 8. Input Bias, Offset Current

vs. Common-Mode Voltage

SOURCE RESISTANCE (

Ω)

100

100M

1k

10k

100k

1M

10M

100

10

1

0.1

BALANCED OR UNBALANCED

VS = ±15V

VCM = 0V

Figure 11. Effective TCVOS vs. Source

Resistance

INPUT OFFSET CURRENT (pA)

400

300

200

100

0

–100 –80 –60 –40 –20 0

20 40

60 80 100

1200 UNITS

TA = +25°C

VS = ±15V

VCM = 0V

Figure 6. Typical Distribution of In-

put Offset Current

TIME AFTER POWER APPLIED (MINUTES)

±3

±2

±1

0

012345

TA = +25°C

VS = ±15V

VCM = 0V

Figure 9. Input Offset Voltage Warm-

Up Drift

TIME FROM OUTPUT SHORT (MINUTES)

01

2

3

4

35

30

25

20

15

10

5

0

–5

–10

–15

–20

–25

–30

–35

TA = –55°C

TA = +25°C

TA = +125°C

VS = ±15V

OUTPUT SHORTED

TO GROUND

TA = +125°C

TA = +25°C

TA = –55°C

Figure 12. Short Circuit Current vs.

Time, Temperature

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