Datasheet

Analog Interface

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1.2 Introduction

The ADS1258EVM is an evaluation module built to the TI Modular EVM System specification. It can be

connected to any Modular EVM System interface card.

The ADS1258EVM is available as a stand-alone printed circuit board (PCB) or as part of the

ADS1258EVM-PDK, which includes an MMB0 motherboard. As a stand-alone PCB, the ADS1258EVM is

useful for prototyping designs and firmware.

Note that the ADS1258EVM has no microprocessor and cannot run software. To connect it to a computer,

some type of interface is required.

2 Analog Interface

For maximum flexibility, the ADS1258EVM 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 ADS1258, as shown in Table 2. Consult Samtec at www.samtec.com or call 1-800-SAMTEC-9 for a

variety of mating connector options.

In addition to J1, the J2 header (Samtec part number TSW-108-07-L-D) provides additional analog inputs

to accommodate the large number of input channels available on the ADS1258. Most of the pins on J1

and J2 are directly connected, with no filtering or protection. Use appropriate caution when handling these

pins.

Table 2. J1—Analog Interface Pinout

PIN NUMBER SIGNAL DESCRIPTION

J1.1 A1 AIN1, ADS1258

J1.2 A0 AIN0, ADS1258

J1.3 A3 AIN3, ADS1258

J1.4 A2 AIN2, ADS1258

J1.5 A5 AIN5, ADS1258

J1.6 A4 AIN4, ADS1258

J1.7 A7 AIN7, ADS1258

J1.8 A6 AIN6, ADS1258

J1.10 J2.11 Connected to J2, pin 11

J1.18 EXTREFN External reference source input (– side of differential input)

J1.20 EXTREFP External reference source input (+ side of differential input)

J1.12–J1.16 (even) Unused

J1.15 Unused

J1.9–J19 (odd) AGND Analog ground connections (except J1.15)

ADS1158EVM, ADS1258EVM, ADS1158EVM-PDK, and ADS1258EVM-PDK SBAU126C– May 2007– Revised May 2011

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