THS4541-Q1 Datasheet, PDF (48/60 Pages) Texas Instruments – 850-MHz Fully Differential Amplifier

THS4541-Q1
SLOS930A – NOVEMBER 2015 – REVISED NOVEMBER 2015
www.ti.com
Typical Applications (continued)
tone FFT 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-Q1 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
SNR = 70.1 dBFS
SFDR = 96 dBFS
-20
THD = 92.83 dBFS
-30
ENOB = 11.35 bits
-40
-50
-60
-70
-80
-90
-100
-110
0
5
10
15
20
25
Frequency (MHz)
D066
Figure 81. 5-MHz FFT, 50-MSPS Test for the Gain of 2 Interface in Figure 80
48
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