Texas Instruments ADS1x48EVM, User Manual, Page: 33 / 48

4.2.3 Histogram Plot
The Histogram plot in Figure 4-9 shows the number of occurrences that a code or group of codes appear. User
selection includes a choice of:
• # of Bins selects the number of bins to include in the plot
• Bin Size selects the number of unique codes to include in each bin
Figure 4-9. Histogram Plot
The # Bins and Bin Size are selectable options and display next to the charting icons near the right side of the
GUI below the statistics.
4.2.4 FFT Statistics and Plot
The FFT plot displays the following statistics:
• Input Channels selected
• Fundamental frequency
• Fundamental power
• Noise floor
• SNR or signal-to-noise ratio
• SFDR or spurious-free dynamic range
• THD or total harmonic distortion
• SINAD or signal-to-noise and distortion
• ENOB or effective number of bits
• Harmonics
The FFT plot is rather meaningless for dc input voltages. However, a low-frequency ac signal can be analyzed
and the FFT plot displayed.
4.3 Register Map
The Register Map window contains information about the how the ADS1x48 is configured. A number of control
buttons and drop-down menus exist to configure the Register Map read and write operations.
Throughout the Register Map window question mark icons appear. Clicking on these icons provides details
pertaining to the items in the locations where they appear. See Figure 4-10 for more details.
www.ti.com ADS1x48EVM GUI
SBAU378A – SEPTEMBER 2021 – REVISED JANUARY 2022
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ADS1x48EVM Evaluation Module 33
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