OPA378 Datasheet, PDF (5/14 Pages) Texas Instruments – Low Noise, 900kHz, 50mV, Rail-to-Rail Input/Output Precision OPERATIONAL AMPLIFIER Zerø-Drift Series

OPA378
OPA2378
www.ti.com
SBOS417 – JANUARY 2008
TYPICAL CHARACTERISTICS
At T_A = +25°C, R_L = 10kΩ, V_S = +5.5V and V_OUT = V_S/2, unless otherwise noted.
MAXIMUM OUTPUT VOLTAGE
vs FREQUENCY
6
V_S = 5.5V
5
4
INPUT CURRENT AND VOLTAGE NOISE
SPECTRAL DENSITY vs FREQUENCY
1k
Current Noise
100
3
Voltage Noise
2
10
1
V_S = 1.8V
0
1k
10k
100k
1M
10M
Frequency (Hz)
Figure 1.
0.0050
TOTAL HARMONIC DISTORTION + NOISE
vs FREQUENCY
0.0045
0.0040
0.0035
0.0030
0.0025
0.0020
0.0015
0.0010
0.0005
0
10
100
1k
10k
Frequency (Hz)
Figure 3.
COMMON-MODE REJECTION RATIO
vs FREQUENCY
120
1
180
10
100
1k
Frequency (Hz)
Figure 2.
OPEN-LOOP GAIN AND PHASE
vs FREQUENCY
10k 30k
0
135
-45
Phase
90
-90
45
-135
Gain
0
-180
-45
-225
0.01 0.1 1 10 100 1k 10k 100k 1M 10M
Frequency (Hz)
Figure 4.
POWER-SUPPLY REJECTION RATIO
vs FREQUENCY
120
100
100
V+
80
80
V-
60
60
40
40
20
20
0
10
100
1k
10k
100k
1M
Frequency (Hz)
Figure 5.
0
1
10
100
1k
10k
100k
1M
Frequency (Hz)
Figure 6.
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