ADS131M04EVM Operation
19
SBAU332A – March 2019 – Revised June 2019
Copyright © 2019, Texas Instruments Incorporated
ADS131M04 Evaluation Module
6.4
Spectral Analysis Tool
The spectral analysis tool, shown in
, is intended to evaluate the dynamic performance (SNR,
THD, SFDR, SINAD, and ENOB) of the ADS131M04 ADC through single-tone sinusoidal signal FFT
analysis using the
7-term Blackman-Harris
window setting.
Figure 15. Spectral Analysis Tool
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 up to a 24-bit
ADC. The
None
option corresponds to not using a window (or using a rectangular window) and is not
recommended.