OPA4277-SP Datasheet, PDF (7/21 Pages) Texas Instruments – High-Precision Operational Amplifier

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6.5 Typical Characteristics
At T_J = 25°C, V_S = ±15 V, and R_L = 2 kΩ, pre-irradiated (unless otherwise noted).
OPA4277-SP
SBOS771 – DECEMBER 2016
140
120
100
80
60
40
20
0
–20
0.1
G
C_L = 0
C_L = 1500 pF
0
–30
–60
φ
–90
–120
–150
–180
1 10 100 1k 10k 100k 1M 10M
Frequency (Hz)
140
120
100
80
60
40
20
0
0.1
–PSR
+PSR
CMR
1
10 100 1k 10k 100k 1M
Frequency (Hz)
Figure 1. Open-Loop Gain/Phase vs Frequency
1000
Current Noise
100
Figure 2. Power Supply and Common-Mode Rejection vs
Frequency
10
Voltage Noise
1
1
10
100
1k
10k
1 s/div
Frequency (Hz)
Noise signal is bandwidth limited to lie between 0.1 Hz and 10 Hz.
Figure 3. Input Noise and Current Noise Spectral Density vs
Frequency
140
Figure 4. Input Noise Voltage vs Time
1
120
100
80
60
40
10
100
1k
10k
100k
1M
Frequency (Hz)
G = 1, measured channel A to D or B to C.
Other combinations yield similar or improved rejection.
Figure 5. Channel Separation vs Frequency
0.1
0.01
G = 10, R_L = 2 kΩ, 10 kΩ
G = 1, R_L = 2 kΩ, 10 kΩ
0.001
10
100
1k
10k
V_OUT = 3.5 Vrms
Frequency (Hz)
100k
Figure 6. Total Harmonic Distortion + Noise vs Frequency
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