AD8031ARTZ datasheet(15/32 Pages) AD

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EVAL-AD7903SDZ User Guide

UG-609

Rev. 0 | Page 15 of 32

OVERVIEW OF THE MAIN WINDOW

The main window of the software is shown in Figure 21 and has

the features described in this section.

File Menu

The File menu offers the choice to

•

Load data: load previously captured data.

•

Save Data as .tsv: save captured data in .tsv format for

future analysis.

•

Save Picture: save the current screen capture.

•

Print: print the main window to the default printer.

•

Exit: close the application.

Eval Board Connected Box

The Eval Board Connected box displays the evaluation board

connected to the USB port—either EVAL-AD7902SDZ or

EVAL-AD7903SDZ.

When an evaluation board is not connected to the USB port, the

software can be operated in standalone mode for data analysis,

and the part information notes the part number from the saved

data file.

ADC Settings Area

The ADC Settings section allows changing the sampling

frequency and the reference voltage value, as well as selecting

Channel 1 or Channel 2.

Reference Voltage (V) Box

By default, the external reference voltage is 5 V (ADR435 on-board

reference). The minimum/maximum voltage calculations are based

on this reference voltage. If you change the reference voltage, you

must change this input accordingly.

Sampling Freq (Hz) Box

The default sampling frequency (10000000 Hz) in the Sampling

Freq (Hz) box matches the maximum sample rate of the ADC

connected to the board. Although you can adjust the sampling

frequency, there are limitations in terms of the sample frequencies

that can be entered related to the SCLK frequency applied. The

sample frequency must be an integer divider of the SCLK

frequency. If an unusable sample frequency is input, the software

automatically adjusts the sample frequency accordingly. Units

can be entered as, for example, 10k for 10,000 Hz. The software

automatically adjusts the sample frequency according to the ability

of the ADC connected to the board. For example, if you enter a

value that is beyond the ability of the device, the software indicates

this and reverts to the maximum sample frequency.

Select Channels Checkboxes

Select either Channel 1 or Channel 2 or both to read the data

from a single ADC or both ADCs simultaneously.

Tabs Area

There are five tabs available in the tabs area of the main window:

Configure, Waveform, Histogram, FFT, and Summary. These

tabs display the data in different formats. Navigation tools are

provided within each tab to allow you to control the cursor,

zooming, and panning (see Figure 22) within the graphs displayed.

Each tab is described in more detail in the Generating a

Waveform Analysis Report; Generating a Histogram of the

ADC Code Distribution; Generating a Fast Fourier Transform

of AC Characteristics; and Generating a Summary of the

Waveform, Histogram, and Fast Fourier Transform sections.

Single Capture Button

Clicking Single Capture performs a single capture from the ADC.

Continuous Capture Button

Clicking Continuous Capture performs a continuous capture

from the ADC.

Num Samples Box

The Num Samples box allows you to select the number of

samples to analyze.

Exit Button

Clicking the Exit button (in the upper right corner of the

window) closes the software. Alternatively, you can select Exit

from the File menu.

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