Spectral Analysis - Texas Instruments ADS7042EVM-PDK User Manual

EVM Operation

4.4 Spectral Analysis

The Spectral Analysis tool shown in
SFDR, SINAD, and ENOB) of the ADC through single-tone sinusoidal signal FFT analysis using the 7-term
Blackman-Harris window setting. The FFT tool includes windowing options that are required to mitigate the
effects of non-coherent sampling (this discussion is beyond the scope of this document). The 7-Term Blackman-
Harris window is the default option and has sufficient dynamic range to resolve the frequency components of
all ADCs included in Table
window) and is not recommended.
As noted in step 4.a in Section
such a source is otherwise unavailable to the user. The PSIEVM can be used to generate clean sinusoidal input
signals for the ADS704X-5XEVM to verify AC performance specifications.
16 ADS7042EVM-PDK, ADS7049-Q1EVM-PDK, and ADS7057EVM-PDK
Evaluation Module
Figure 4-4 is intended to evaluate the dynamic performance (SNR, THD,
1-2. The None option corresponds to not using a window (or using a rectangular
Figure 4-4. Spectral Analysis in the ADS704X-5XEVM GUI
4.1, Texas Instruments offers the
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PSIEVM as a precision signal generator if
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SBAU382 – NOVEMBER 2021
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