OPA1678 Datasheet, PDF (9/41 Pages) Texas Instruments – Low-Distortion Audio Operational Amplifiers

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6.7 Typical Characteristics
at T_A = 25°C, V_S = ±15 V, and R_L = 2 kΩ, unless otherwise noted
1000
OPA1678, OPA1679
SBOS855 – FEBRUARY 2017
100
10
1
1
10
100
1k
10k
100k
Frequency (Hz)
C001
Figure 1. Input Voltage Noise Density vs Frequency
10000
1000
Resistor Noise Contribution
Voltage Noise Contribution
Current Noise Contribution
Total Noise
100
10
1
0.1
10 100 1k 10k 100k 1M 10M 100M 1000M
Source Resistance (O)
C001
Figure 3. Voltage Noise vs Source Resistance
140
180
Gain
120
Phase
100
135
80
60
90
40
20
45
0
±20
0
10 100 1k 10k 100k 1M 10M 100M
Frequency (Hz)
C006
C_L = 10 pF
Figure 5. Open-Loop Gain and Phase vs Frequency
Time (1s/div)
C003
20
18
16
14
12
10
8
6
4
2
0
10k
Figure 2. 0.1-Hz to 10-Hz Noise
VS = +/- 18 V
VS = +/- 5 V
VS = +/- 2.25 V
100k
1M
Frequency (Hz)
10M
C015
Figure 4. Maximum Output Voltage vs Frequency
30
20
10
0
±10
±20
±30
±40
100k
Gain = -1 V/V
Gain = 1 V/V
Gain = 10 V/V
1M
10M
Frequency (Hz)
C_L = 10 pF
Figure 6. Closed-Loop Gain vs Frequency
100M
C002
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