DEM-ADS1216 Datasheet, PDF (3/9 Pages) Texas Instruments – EVALUATION FIXTURE

SAVE DATA
The Save Data List shown in Figure 3 displays the individual
data values as well as the mean and standard decimation of
the data.
FIGURE 3. Data List.
CONFIGURATION
The Configure Digital Filter opens a window that provides
many options, as shown in Figure 4.
Filter Decimation Ratio
The Filter Decimation Ratio box allows you to adjust the
decimation ratio with the scroll bar or by entering the value
in the box at the bottom. Additionally, as you change the
decimation ratio, you can observe the resulting data rate.
Calibration Registers
The current values of the Offset, Full-Scale Output Data
registers can be read and displayed. Additionally, these
values can be changed by entering a new HEX value in the
field and pushing the set button.
Calibration
Five types of calibration can be performed. When the button
is pushed the ADS1216 performs the calibration then it
reads back and displays the results in the calibration regis-
ters. The five types of calibration are:
1) Selfcal—Both Offset and Gain Calibration
2) Selfocal—Only Offset Calibration
3) Selfgcal—Only Gain Calibration
4) Sysocal—Offset Calibration, Input = 0V
5) Sysgcal—Gain Calibration, Input = V_REF
Set I/O Direction
The eight pins of I/O can be individually set for output or
input. The output pins will be set to the HEX value entered
in the “Write I/O” field when the “Write I/O” button is
selected. The value of all pins will be displayed in the box
next to the “Read I/O” button when it is selected.
Status
The various control bits can be set and monitored in the
status box. Additionally, the revision ID of the ADS1216
will be displayed. The status bits and their functions are
shown in Table I.
LSB_1^st
EN_Buff
V_REF_HI
EN_V_REF
0
Send MSB First
No Input Buffer
V_REF = 1.25V
V_REF OFF
TABLE I. Control Bits.
1
Send LSB First
Input Buffer Enabled
V_REF = 2.5V
V_REF ON
FIGURE 4. Configuration Window.
DEM-ADS1216
SBAU038
3