THS4531A Datasheet, PDF (33/50 Pages) Texas Instruments – Ultra Low Power, Rail-to-Rail Output, Fully-Differential Amplifier

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V_IN±
R_G
100 pF
From Analyzer
0.22 F
R_G
V_IN+
100 pF
THS4531A
SLOS823A – DECEMBER 2012 – REVISED JANUARY 2013
R_F
10
V_S+
+
V_OCM
±
THS4531A
V_OUT±
To Analyzer
10
V_OUT+
R_F
Figure 82. THS4531A Audio Analyzer Test Circuit
−95
−97
−99
−101
−103
−105
−107
−109
−111
−113
−115
0
No Weighting
A−Weighting
V_S = 5 V
G = 1 V/V
V_OUT = 1 V_RMS
R_F = 2 kΩ
R_L = 600 Ω
5k
10k
15k
20k
24k
Frequency (Hz)
G070
Figure 83. THD+N on Audio Analyzer, 10 Hz to 24 kHz
0
−10
−20
−30
−40
−50
−60
−70
−80
−90
−100
−110
−120
−130
−140
0
V_S = 5 V
G = 1 V/V
V_OUT = 1 V_RMS
R_F = 2 kΩ
R_L = 600 Ω
5k
10k
15k
20k
24k
Frequency (Hz)
G071
Figure 84. 1kHz FFT Plot on Audio Analyzer
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