Datasheet

180
160
140
120
100
80
60
40
20
0
Common-Mode Rejection Ratio (dB)
Power-Supply Rejection Ratio (dB)
1 10 100
1k 10k 100k 1M 10M 100M
Frequency (Hz)
CMRR
+PSRR
-PSRR
0.12
0.10
0.08
0.06
0.04
0.02
0
CMRR( V/V)m
-50 -25
-75
0 25 50
75
100 125 150
Temperature( C)
°
100nV/div
Time (1s/div)
VoltageNoiseDensity(nV/ )ÖHz
0.1
Frequency(Hz)
100k101 100 1k 10k
100
10
1
0.001
0.0001
0.00001
-100
-
-
120
140
Total Harmonic Distortion + Noise (%)
Total Harmonic Distortion + Noise (dB)
10 100
1k 10k 20k
Frequency (Hz)
G = +1
G = -1
V = 3V
BW = 80kHz
OUT RMS
R = 2k
L
W
0.01
0.001
0.0001
0.00001
Total Harmonic Distortion + Noise (%)
Total Harmonic Distortion + Noise (dB)
0.1
1 10 100
Frequency (Hz)
-
-
-
80
100
120
140-
BW = 80kHz
R = 2k
1kHz Signal
L
W
G = 1-
G = +1
NOTE: Increase at low signal levels is a
of increased % contribution of noise.
result
OPA140
OPA2140, OPA4140
SBOS498A –JULY 2010–REVISED AUGUST 2010 www.ti.com
TYPICAL CHARACTERISTICS (continued)
At T
A
= +25°C, V
S
= ±18V, R
L
= 2kΩ connected to midsupply, V
CM
= V
OUT
= midsupply, unless otherwise noted.
CMRR AND PSRR vs FREQUENCY (Referred to Input) COMMON-MODE REJECTION RATIO vs TEMPERATURE
Figure 8. Figure 9.
0.1Hz to 10Hz NOISE INPUT VOLTAGE NOISE DENSITY vs FREQUENCY
Figure 10. Figure 11.
THD+N RATIO vs FREQUENCY THD+N RATIO vs OUTPUT AMPLITUDE
Figure 12. Figure 13.
8 Copyright © 2010, Texas Instruments Incorporated
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