DEM-ADS1216 Datasheet, PDF (5/9 Pages) Texas Instruments – EVALUATION FIXTURE

TEST SCREENS
Opcode Test.
The screen in Figure 8 allows the opcodes to be tested and
the results observed.
FIGURE 8. Opcode Control.
One convenient way to test the communications and opera-
tions of the ADS1216 Demo software is to go to this screen,
select “Reset”, and then “Read all Regs”. You should end up
with a register dump that looks like Figure 9.
FIGURE 10. Ram Test.
Noise Test
This test provides an automated means to verify the perfor-
mance of the ADS1216 across various decimation ratio
values, PGA settings and with averaging of the results. With
all the options selected, this test can take a long time to
complete. The results are displayed in a tabular format,
which shows the PGA settings, Decimation Rate, Average
Output, Standard Decmiation, and Effective number of bits,
as shown in Figure 11.
FIGURE 9. Reset Condition.
You can observe that the reset state of the registers are: F6,
10, 00, 00, 00, 00, 00, FF, F0, 00, 00, 00, 00, 22, 90, 67.
This screen also shows the state of the digital control signals.
Any opcode can be entered and tested to observe the results
RAM R/W Test
The test screen in Figure 10 provides tools for testing RAM.
Various simple operations have been assigned to a button.
Additionally, a full RAM test can be executed with the “Test
Ram” button. This clears RAM, generates random data,
writes to the RAM and verifies that the contents matches the
random data.
FIGURE 11. Noise Test Results.
The “File” menu selection gives you the option to save your
data. All data is saved in a comma delimited format so that
it can be imported into a spreadsheet for further analy-
sis.
DEM-ADS1216
SBAU038
5