Histogram Display; Figure 7-8. Histogram Analysis Tool - Texas Instruments ADS8688EVM-PDK User Manual

EVM Operation

7.6 Histogram Display

Noise degrades ADC resolution and the histogram tool can be used to estimate effective resolution, which
is an indicator of the number of bits of ADC resolution losses resulting from noise generated by the various
sources connected to the ADC when measuring a DC signal. The cumulative effect of noise coupling to the
ADC output from sources such as the input drive circuits, the reference drive circuit, the ADC power supply,
and the ADC itself is reflected in the standard deviation of the ADC output code histogram that is obtained by
performing multiple conversions of a DC input applied to a given channel. As shown in
corresponding to a DC input is displayed on clicking the Capture button.
16 ADS8688EVM-PDK Evaluation Module

Figure 7-8. Histogram Analysis Tool

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Figure 7-8, the histogram
SBAU230C – AUGUST 2014 – REVISED MARCH 2021
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