Datasheet

Analog Interface

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1.2 Introduction

The ADS7924EVM, shown in Figure 1, is an evaluation module built to the TI Modular EVM System

specification. It can be connected to any modular EVM system interface card.

The ADS7924EVM is available as a stand-alone printed circuit board (PCB) or as part of the

ADS7924EVM-PDK, which includes an MMB3 motherboard and software. As a stand-alone PCB, the

ADS7924EVM is useful for prototyping designs and firmware.

Note that the ADS7924EVM has no microprocessor and cannot run software. To connect it to a computer,

some type of interface is required.

Figure 1. ADS7924EVM

2 Analog Interface

For maximum flexibility, the ADS7924EVM is designed for easy interfacing to multiple analog sources.

Samtec part numbers SSW-110-22-F-D-VS-K and TSM-110-01-T-DV-P provide a convenient 10-pin,

dual-row, header/socket combination at J1. This header/socket provides access to the analog input pins of

the ADS7924. Consult Samtec at http://www.samtec.com or call 1-800-SAMTEC-9 for a variety of mating

connector options. These signals can also be connected to the terminal block J4.

All of the pins on J1 and J4 are directly connected to the inputs of the ADS7924. Use appropriate caution

when handling these pins. Table 1 summarizes the pinouts for analog interfaces J1 and J4.

Table 1. J1, J4: Analog Interface Pinout

Pin Number Signal Description

J1.2, J4-6 CH3 Analog input channel 3

J1.4, J4-5 CH2 Analog input channel 2

J1.6, J4-4 CH1 Analog input channel 1

J1.8, J4-3 CH0 Analog input channel 0

J4-2 ADCIN ADC input

J1.18 REF– Unused

J1.20 REF+ Unused

J1.10-16 (even) Unused Unused

J1.1-19 (odd), J4-1 AGND Analog ground connections

ADS7924EVM and ADS7924EVM-PDK User's Guide SBAU173–June 2010