THS4541_16 Datasheet, PDF (48/61 Pages) Texas Instruments – THS4541 Negative Rail Input, Rail-to-Rail Output, Precision, 850-MHz Fully Differential Amplifier

THS4541
SLOS375A – AUGUST 2014 – REVISED SEPTEMBER 2014
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Typical Applications (continued)
is shown in Figure 81, where the jumper is placed from pins 2 to 3. The reported SNR of 70.09 dBFs is only a
slight reduction from the tested ADC-only performance of 70.42 dBFs, showing the value of the interstage noise
bandwidth limiting filter. The exceptionally low harmonic distortion for the THS4541 also shows up in the very low
SFDR and THD shown in Figure 81. This 96-dB SFDR and 92.83-dB THD are comparable to the ADC-only test
results.
10.2.2.3 Application Curve
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
0
SNR = 70.1 dBFS
SFDR = 96 dBFS
THD = 92.83 dBFS
ENOB = 11.35 bits
5
10
15
20
Frequency (MHz)
25
D066
Figure 81. 5-MHz FFT, 50-MSPS Test for the Gain of 2 Interface in Figure 80
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