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SBAU293 – March 2018
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ADS1261 and ADS1235 Evaluation Module
ADVANCE INFORMATION
Use R33 to measure the AVDD supply current, by measuring the voltage drop across this resistor or by
removing the resistor and connecting a dc current meter between the "A+" and "A–" test points.
2.2.2
Digital Supply Configuration of the ADC
The ADS1261 (or ADS1235) digital supply requires a 2.7- to 5.25-V source connected between DVDD
and DGND. The EVM provides a (typical) 3.3-V onboard digital supply for the digital supply of the ADC.
R38 can be use to measure the DVDD supply current, by measuring the voltage drop across this resistor
or by removing the resistor and connecting a dc current meter between the "D+" and "D–" test points.
2.3
Software Installation and Hardware Connection Procedure
Use the following steps at startup:
1. Install the GUI software on the PC.
2. Install the device package software on the PC. (
ADS1261 Device Package
for the ADS1261EVM and
ADS1235 Device Package
for the ADS1235EVM.)
3. Ensure all jumpers and switches are configured in the default configuration per
Table 2
and
Figure 1
.
4. Connect the EVM to the PC using a USB cable to power the board.
5. If prompted, install any required drivers.
6. Start the GUI application on your PC. The GUI should automatically detect the connected EVM.
NOTE:
After powering the EVM, the green D2, D3, and “+5V” LEDS will be lit.
