4 EVM Operation
4.1 Connecting the Hardware
After installing the software, connect the EVM as shown in
1. Physically connect P2 of the PHI to J4 of the ADS704X-5XEVM. Install the screws to ensure a robust
connection
2. Connect the USB cable from the PHI to the computer first:
a. LED D5 on the PHI lights up, indicating that the PHI is powered
b. LEDs D1 and D2 on the PHI start blinking to indicate that the PHI is booted up and communicating with
shows the resulting LED indicators
3. Start the software GUI. The LEDs blink slowly as the FPGA firmware is loaded on the PHI. This
loading takes a few seconds and then the AVDD and DVDD power supplies turn on. LED D1 on the
ADS704X-5XEVM (as shown in
) illuminates green to indicate that AVDD is being supplied to the
EVM
4. Connect the signal generator. The input range varies for the different ADCs, but is typically 0 V to AVDD for
single-ended devices or –AVDD to +AVDD for differential devices. Check the specific
for
more information about allowable input ranges. In any case, adjust the input signal to just below full-scale
range to avoid clipping
a. Texas Instruments offers the
as a precision signal generator if such a source is otherwise
unavailable to the user. The PSIEVM can be used to generate clean sinusoidal input signals for the
ADS704X-5XEVM to verify AC performance specifications.
Figure 4-1. Hardware Connections on the ADS704X-5XEVM
EVM Operation
SBAU382 – NOVEMBER 2021
ADS7042EVM-PDK, ADS7049-Q1EVM-PDK, and ADS7057EVM-PDK
Evaluation Module
13
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