6.3.1 Time Domain Display
The
Time Domain Display
tool allows visualization of the ADC conversion data for ADC1A, ADC1B, ADC3A, and
ADC3B. This tool is useful for both studying the circuit behavior and debugging any gross problems with the
ADC or input source.
The
Data Capture Configuration
panel on the left side of the window allows the user to independently specify the
oversampling ratio (OSR) used by ADC1A, ADC3A and ADC1B, ADC3B by configuring OSR13A and OSR13B,
respectively. In addition, ADC1A or ADC1B can be selected as the driving channel source to generate the
DRDYn interrupt. If the data rates differ, and the faster channel is selected as the DRDYn driving source, the
GUI collects data until the faster channel reaches the specified number of samples. In this case, the slower
channel ends up with fewer samples than specified. If the slower channel is selected as the DRDYn driving
source, the GUI collects the specified number of samples for all channels, but some conversion data are missed
from the faster channels, reducing the effective data rate.
Initiate a data capture by specifying the number of samples and clicking the
Capture
button at the bottom of the
Data Capture Configuration
panel. The raw ADC conversion data is then displayed on the graph with a statistical
summary of each channel in the
Measurements
table below the plot. The
Units
radio buttons configure the plot
y-axis and the summary table results as either
Codes
or
Voltage (V)
. When
Voltage (V)
is selected, the values
are input-referred based on the channel gain setting.
shows an example of the
Time Domain Display
window and relevant controls. Switching pages to any of the other
Analysis
tools described in the subsequent
sections exports the same data for viewing without having to recollect the data.
Figure 6-5. Time Domain Display Tool
ADS131B26Q1EVM-PDK Software Reference
20
ADS131B26Q1EVM-PDK Evaluation Module
SBAU413 – OCTOBER 2022
Copyright © 2022 Texas Instruments Incorporated
