EVAL-AD7795 Datasheet, PDF (6/16 Pages) Analog Devices – Evaluation Board for the AD7795 16-Bit, Low Power Sigma-Delta ADC (6 Channels)

EVAL-AD7795
MAIN WINDOW OPTIONS
Menu Bar
File. Allows you to read previously stored data for display or
analysis, write the current set of data to a file for later use, and
exit the program.
About. Provides information on the revision of software
being used.
Buttons
Reset. Allows you to reset the AD7795 and set the registers
to the power-up conditions as specified by the software
(channel = AIN1(−)/AIN1(−), bias voltage generator enabled on
AIN1(−), gain = 64, update rate = 16.7 Hz, internal reference,
chop enabled).
Exit. Allows you to exit the software. It serves the same purpose
as the Quit option in the File drop-down menu.
Sample. Allows you to read a number of samples from the
AD7795. Noise analysis is then performed on the samples.
These samples can be stored for further analysis.
The sample size is entered in the Num Samples spin box.
Continuous. Allows you to read a number of samples conti-
nuously. The software gathers a number of samples as specified
by Num Samples, performs noise analysis on the samples, and
then gathers the next group of samples.
Registers. Allows you to access the configuration register, mode
register, and IO register.
Other Registers. Allows you to access the ID register, status
register, offset register, and full-scale register.
Quick Analysis. Displays the Quick Analysis window. The Quick
Analysis window gives you access to a subset of the AD7795
control bits: channel, update rate, gain, reference source, and
chop. For access to all control bits, click the Registers button or
the Other Registers button.
Temp Demo. Allows you to access the temperature demonstration
software.
Samples/Analysis. Serves the same purpose as the Sample button.
Waveform. The gathered conversions are displayed in graph form.
Histogram. The gathered samples are used to generate a
histogram.
Codes. The gathered samples can be displayed in code or in
voltage format. When the Codes button is clicked, the values
are displayed as code and the Codes button changes to Volts.
To display the information in volts, click the Volts button.
Applied Reference. By default, the internal reference is used.
To use an external reference, Reference in the Quick Analysis
window should be set to REFIN1 if the external reference is
applied between REFIN1(+) and REFIN1(−), or set to REFIN2
if the applied reference is applied between REFIN2(+) and
REFIN2(−). The value of the external reference should be
entered in the Applied Reference spin box.
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