Datasheet

-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
FFT - dBV
0 2k 4k 6k 8k 10k 12k 14 16k 18k 20k
f - Frequency - Hz
R = 300
L
Gen Mon - 300
V = 5 V,
V = 1 V ,
G = 1,
R = 0
S
OUT RMS
F
W
-120
-115
-110
-105
-100
-95
-90
10 100 1k 10k
100k
f - Frequency - Hz
No weighting
R = 300 ,
L
W
R = 100 k
L
W
THD+N - Total Harmonic Distortion + Noise - dBv
V = 5 V,
V = 1 V ,
G = 1,
R = 0 ,
BW = 80 kHz
S
OUT RMS
F
W
A-weighting
R = 300 ,
L
W
R = 100 k
L
W
0 2k 4k 6k 8k 10k 12k 14 16k 18k 20k
f - Frequency - Hz
R = 100k
L
Gen Mon - 100k
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
FFT - dBV
V = 5 V,
V = 1 V ,
G = 1,
R = 0
S
OUT RMS
F
W
OPA835
OPA2835
SLOS713E –JANUARY 2011–REVISED JULY 2013 www.ti.com
Figure 76. OPA835 1 Vrms 20 Hz to 80 kHz THD+N Figure 77. OPA835 and AP Gen Mon 1kHz FFT
Plot; V
OUT
= 1V
RMS
, R
L
= 100kΩ
Figure 78. OPA835 and AP Gen Mon 1kHz FFT Plot;
V
OUT
= 1V
RMS
, R
L
= 300Ω
ADC Driver Performance
The OPA835 provides excellent performance when driving high performance delta-sigma (ΔΣ) and successive
approximation register (SAR) ADCs in low power audio and industrial applications.
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