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Product details

Parameters

Vs (Min) (V) 7.5 Vs (Max) (V) 36 Offset voltage drift (+/-) (Max) (uV/degrees celsius) 1.5 Offset voltage (+/-) (Max) (uV) 25 open-in-new Find other 4-20mA signal conditioners

Package | Pins | Size

PDIP (N) 14 181 mm² 19.3 x 9.4 SOIC (D) 14 52 mm² 8.65 x 6 open-in-new Find other 4-20mA signal conditioners

Features

  • LOW UNADJUSTED ERROR
  • TWO PRECISION CURRENT SOURCES: 800 µA each
  • LINEARIZATION
  • 2-OR 3-WIRE RTD OPERATION
  • LOW OFFSET DRIFT: 0.4 µV/°C
  • LOW OUTPUT CURRENT NOISE: 30NAPP
  • HIGH PSR: 110dB minimum
  • HIGH CMR: 86dB minimum
  • WIDE SUPPLY RANGE: 7.5V to 36V
  • DIP-14 AND SO-14 PACKAGES
  • APPLICATIONS
    • INDUSTRIAL PROCESS CONTROL
    • FACTORY AUTOMATION
    • SCADA REMOTE DATA ACQUISITION
    • REMOTE TEMPERATURE AND PRESSURE TRANSDUCERS

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Description

The XTR105 is a monolithic 4-20mA, 2-wire current transmitter with two precision current sources. It provides complete current excitation for platinum RTD temperature sensors and bridges, instrumentation amplifiers, and current output circuitry on a single integrated circuit.

Versatile linearization circuitry provides a 2nd-order correction to the RTD, typically achieving a 40:1 improvement in linearity.

Instrumentation amplifier gain can be configured for a wide range of temperature or pressure measurements. Total unadjusted error of the complete current transmitter is low enough to permit use without adjustment in many applications. This includes zero output current drift, span drift, and nonlinearity. The XTR105 operates on loop power-supply voltages down to 7.5V.

The XTR105 is available in DIP-14 and SO-14 surface-mount packages and is specified for the –40°C to +85°C industrial temperature range.

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Technical documentation

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Type Title Date
* Data sheet XTR105: 4-20mA Current Transmitter with Sensor Excitation and Linearization datasheet (Rev. B) Aug. 27, 2004
Technical article 4-20 mA industrial loops made easy Oct. 03, 2014
Application note 4Q 2011 Issue Analog Applications Journal Nov. 09, 2011
Application note Analog linearization of resistance temperature detectors Nov. 09, 2011
Application note 20mA to 0-20mA Converter & Current Summing Current-to-Current Converters Oct. 02, 2000
Application note FOUR-WIRE RTD CURRENT-LOOP TRANSMITTER Sep. 27, 2000
Application note IC Building Blocks Form Complete Isolated 4-20mA Current-Loop Sep. 27, 2000

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
document-generic User guide
8499
Description

 

The DLP NIRscan is a complete evaluation module (EVM) to design a high performance, affordable near-infrared spectrometer.  This flexible tool contains everything a designer needs to start developing a DLP-based spectrometer right out of the box.  The EVM features the DLP 0.45 WXGA NIR (...)

Features

The DLP® NIRscan™ evaluation module includes the key features highlighted below. For mobile sensing, check out the DLP NIRscan Nano evaluation module. The table compares the key specifications of both evaluation modules.

 High Performance EVMMobileSensing EVM
Key Features DLP NIRscan DLP NIRscan Nano
(...)

Design tools & simulation

SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SIMULATION TOOL Download
SPICE-based analog simulation program
TINA-TI TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
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CALCULATION TOOL Download
Free Tool: Current Transmitter Component Calculator
XTR-ERROR-CALC This spreadsheet calculates error for Current Transmitter (XTR) devices and external components.

Reference designs

REFERENCE DESIGNS Download
Analog Linearized 3-Wire PT100 RTD to 2-Wire 4-20mA Current Loop Transmitter Reference Design
TIPD161 This design features a single-chip solution to linearize and transmit a 3-wire PT100 RTD over the industry standard 2-wire 4-20mA current loop.  The design was configured for a -200°C to 800°C  temperature range, but other temperature ranges can be achieved by adjusting the (...)
document-generic Schematic document-generic User guide
Design files

CAD/CAE symbols

Package Pins Download
PDIP (N) 14 View options
SOIC (D) 14 View options

Ordering & quality

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