Frequency Domain Display - Texas Instruments ADS1263EVM-PDK User Manual

EVM Operation and GUI

7.4 Frequency Domain Display

Figure 7-5 shows the spectral analysis tool that evaluates the dynamic performance (SNR, THD, SFDR, SINAD,
and ENOB) of the ADS1263. This dynamic performance is calculated by 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 a 32-bit ADC. The None option corresponds to not using a window (or using a
rectangular window) and is not recommended.
Figure 7-5. ADS1263EVM GUI Frequency Domain Display Page
24 ADS1263EVM-PDK Evaluation Module
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SBAU206B – APRIL 2015 – REVISED MAY 2023
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