Texas Instruments ADS1285EVM-PDK, User Manual, Page: 4 / 40

1 EVM Overview
The evaluation kit includes the ADS1285EVM-PDK board and the precision host interface (PHI) controller
board. The PHI board enables the accompanying computer software to communicate with the ADC over the
universal serial bus (USB) for data capture and analysis because the ADS1285EVM-PDK does not contains a
microprocessor on the board.
The PHI board primarily serves three functions:
• Provides a communication interface from the EVM to the computer through a USB port
• Provides the digital input and output signals necessary to communicate with the ADS1285EVM-PDK
• Supplies power to all active circuitry on the ADS1285EVM-PDK board
The following related documents are available for download through the Texas Instruments web site at
www.ti.com .
Table 1-1. Related Documentation
Device Literature Number
ADS1285 SBASAK6
1.1 ADS1285EVM-PDK Kit
The ADS1285 evaluation module kit includes the following features:
• Contains all support circuitry needed for the ADS1285
• USB powered: No external power supply is required
• Voltage reference options: External or onboard
• Clock options: External clock source or 8.192-MHz onboard crystal oscillator with dividers for 4.096-MHz
• Voltage supply options: Unipolar or bipolar support with adjustable AVDD1 low-dropout regulator (LDO) and
externally sourced –2.5-V LDO
• Signals contained within signal bank for ease of probing
• Built-in analysis tools including scope, FFT, histogram, and DAC configuration using the graphical user
interface (GUI)
2 ADS1285EVM-PDK Quick-Start Guide
The following instructions are a step-by-step guide to connecting the ADS1285EVM-PDK to the computer and
evaluating the performance of the ADS1285:
1. Review the default jumper settings in Section 7 and GUI software installation in Section 7.2 .
2. Connect the ADS1285EVM-PDK to the PHI. Install the two screws as indicated in Figure 2-1 .
3. Attach the micro USB to the PHI board and your PC. Three LEDs illuminate on the PHI board to indicate
connectivity to the PC.
a. LED D5 on the PHI lights up, indicating that the PHI is powered up.
b. LEDs D1 and D2 on the PHI start blinking to indicate that the PHI is booted up and communicating with
the PC. Figure 2-1 shows the resulting LED indicators.
Figure 2-1. ADS1285EVM-PDK Hardware Setup and LED Indicators
EVM Overview www.ti.com
4 ADS1285EVM-PDK Evaluation Module SBAU394A – APRIL 2022 – REVISED SEPTEMBER 2022
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