1 EVM Overview

The ADS131A04EVM is a platform for evaluating the performance of the ADS131A04, which is a 4-channel, simultaneously-sampling, 24-bit, ΔΣ ADC. The evaluation kit includes the ADS131A04EVM board and the precision host interface (PHI) controller board that enables the accompanying computer software to communicate with the ADC over the USB for data capture and analysis.

The ADS131A04EVM board includes the ADS131A04 ADC and all the peripheral analog circuits and components required to extract optimum performance from the ADC.

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 ADS131A04
• Supplies power to all active circuitry on the ADS131A04EVM board