OPA1662
OPA1664
SBOS489 –DECEMBER 2011
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TYPICAL CHARACTERISTICS
At TA = +25°C, VS = ±15 V, and RL = 2 kΩ, unless otherwise noted.
INPUT VOLTAGE NOISE DENSITY AND
INPUT CURRENT NOISE DENSITY vs FREQUENCY
0.1Hz TO 10Hz NOISE
100
10
1
100
Voltage Noise
Current Noise
10
1
0.1
0.1
100k
1
10
100
1k
10k
Frequency (Hz)
G001
Time (1s/div)
G002
Figure 1.
Figure 2.
VOLTAGE NOISE vs SOURCE RESISTANCE
MAXIMUM OUTPUT VOLTAGE vs FREQUENCY
15
12
10
8
10k
Eo2 = en2 + (inRS)2 + 4KTRS
VS = ± 15 V
EO
1k
100
10
RS
OPA166x
OPA165x
VS = ± 5 V
5
2
VS = ± 1.5 V
Resistor Noise
0
10k
1
100
100k
1M
10M
1k
10k
100k
1M
Frequency (Hz)
G004
G003
Source Resistance (W)
Figure 3.
Figure 4.
GAIN AND PHASE vs FREQUENCY
CLOSED-LOOP GAIN vs FREQUENCY
140
120
100
80
180
40
20
CL = 100pF
Gain = −1V/V
Gain = +1V/V
Gain = +10V/V
135
90
45
0
60
40
0
20
Gain
Phase
0
−20
10
100
1k
10k
100k
1M
10M
100M
−20
1k
10k
100k
1M
10M
100M
Frequency (Hz)
G005
Frequency (Hz)
G006
Figure 5.
Figure 6.
6
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