Texas Instruments ADS833 EVM Series, User Manual

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Analog Interface
1.2 Introduction
The ADS833xEVM, 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.
Note that the ADS833xEVM has no microprocessor and cannot run software. To connect it to a computer,
some type of interface is required.
Figure 1. ADS833xEVM
2 Analog Interface
For maximum flexibility, the ADS833xEVM 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 ADS8331/32. Consult Samtec at
http://www.samtec.com or call 1-800-SAMTEC-9 for a variety of
mating connector options.
The input pins on the ADS833xEVM are directly connected to the part, with no filtering or protection. It is
important that appropriate caution is taken when handling the pins.
Table 1 summarizes the pinouts for
analog interface J1.
Table 1. J1: Analog Interface Pinout
Pin Number Signal Description
J1.1 - J1.19 (odd) GND Analog ground connections
J1.2 IN0 IN0 analog input
J1.4 IN1 IN1 analog input
J1.6 IN2 IN2 analog input
J1.8 IN3 IN3 analog input
J1.10 NC/IN4 IN4 analog input (ADS8332 only)
J1.12 NC/IN5 IN5 analog input (ADS8332 only)
J1.14 NC/IN6 IN6 analog input (ADS8332 only)
J1.16 NC/IN7 IN7 analog input (ADS8332 only)
J1.18 GND Analog ground connection
J1.20 REF+ External reference source input (positive)
3 SBAU176A – August 2010 – Revised May 2011 ADS833xEVM User ' s Guide
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