Overview
4
SBOU123A – March 2012 – Revised September 2016
Copyright © 2012–2016, Texas Instruments Incorporated
XTR108EVM-USB Evaluation Board and Software Tutorial
1
Overview
This document provides the information needed to set up and operate the XTR108EVM-USB evaluation
module, which is a test platform for the
programmable two-wire transmitter and sensor
conditioner. For a more detailed description of the XTR108, refer to the product data sheet (
)
available from the Texas Instruments web site at
.
The XTR108EVM-USB is an evaluation module that is used to fully evaluate the XTR108. The XTR108 is
an integrated circuit that provides correction of zero, span, and linearization errors for RTDs (resistive
thermal devices) and bridge sensors. Overall system accuracy of 0.1% error (relative to full-scale output
span) or less is easily achievable using a two-point calibration algorithm. The XTR108EVM-USB consists
of three PCBs. One board (the
) generates the digital signals required to communicate
with the XTR108. The second board (XTR108EVM-USB Interface Board) provides a convenient interface
to standard multimeters and includes an onboard RTD emulator circuit to facilitate calibration. The third
board (XTR108EVM-USB Sensor Board) contains the XTR108 device as well as support and
configuration circuitry. Once calibrated, the XTR108EVM-USB Sensor Board can be used as a fully-
functional, stand-alone system. Similarly, the USB-DAQ Platform and XTR108EVM-USB Interface Board
can be connected to other stand-alone XTR108 circuitry for quick calibration, making the XTR108EVM-
USB a capable production tool.
