ADS131M04EVM Operation
20
SBAU332A – March 2019 – Revised June 2019
Copyright © 2019, Texas Instruments Incorporated
ADS131M04 Evaluation Module
6.5
Histogram Tool
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
, the histogram corresponding to a DC input is displayed on clicking the
Capture
button.
Figure 16. Histogram Analysis Tool