OP497
±3
1k
100
10
T
V
= 25°C
= ±2V TO ±20V
T
V
V
= 25°C
= ±15V
A
A
S
S
= 0V
CM
±2
±1
0
CURRENT NOISE
VOLTAGE NOISE
1
0
1
2
3
4
5
1
10
100
FREQUENCY (Hz)
1k
TIME AFTER POWER APPLIED (Minutes)
Figure 11. Input Offset Voltage Warm-Up Drift
Figure 14. Voltage Noise Density vs. Frequency
10k
1k
10
T
V
= 25°C
= ±2V TO ±20V
BALANCED OR UNBALANCED
A
V
V
= ±15V
S
S
= 0V
CM
1
10Hz
1kHz
T
= 25°C
100
A
0.1
0.01
10
10
100
1k
10k
100k
1M
10M
100
1k
10k
100k
1M
10M
SOURCE RESISTANCE (Ω)
SOURCE RESISTANCE (Ω)
Figure 12. Effective Offset Voltage vs. Source Resistance
Figure 15. Total Noise Density vs. Source Resistance
100
10
1
BALANCED OR UNBALANCED
5mV
1s
V
V
= ±15V
S
= 0V
CM
100
90
10
0%
V
T
= ±15V
S
= 25°C
A
0.1
100
1k
10k
100k
1M
10M
100M
0
2
4
6
8
10
SOURCE RESISTANCE (Ω)
TIME (Seconds)
Figure 13. Effective TCVOS vs. Source Resistance
Figure 16. 0.1 Hz to 10 Hz Noise Voltage
Rev. E | Page 6 of 16
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