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Product details

Parameters

Vs (Min) (V) 4.5 Vs (Max) (V) 5.5 Offset voltage drift (+/-) (Max) (uV/degrees celsius) 0.1 Offset voltage (+/-) (Max) (uV) 50 open-in-new Find other 4-20mA signal conditioners

Package | Pins | Size

SSOP (DBQ) 24 52 mm² 8.65 x 6 open-in-new Find other 4-20mA signal conditioners

Features

  • COMPLETE TRANSMITTER +RTD LINEARIZATION
  • TWO-WIRE, 4-20mA OUTPUT
  • VOLTAGE OUTPUT (0.5V to 4.5V)
  • ELIMINATES POTENTIOMETERS AND TRIMMING
  • DIGITALLY CALIBRATED
  • 5V SUB-REGULATOR OUTPUT
  • SERIAL SPI™ BUS INTERFACE
  • SSOP-24 PACKAGE
  • APPLICATIONS
    • REMOTE RTD TRANSMITTERS
    • PRESSURE BRIDGE TRANSMITTERS
    • STRAIN GAGE TRANSMITTERS
    • SCADA REMOTE DATA ACQUISITION
    • WEIGHING SYSTEMS
    • INDUSTRIAL PROCESS CONTROL

SPI is a trademark of Motorola, Inc. All other trademarks are the property of their respective owners.

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Description

The XTR108 is a "smart", programmable, 4-20mA, two-wire transmitter designed for temperature and bridge sensors. Zero, span, and linearization errors in the analog signal path can be calibrated via a standard digital serial interface, eliminating manual trimming. Non-volatile ex-ternal EEPROM stores calibration settings.

The all-analog signal path contains an input multiplexer, autozeroed programmable-gain instrumentation amplifier, dual programmable current sources, linearization circuit, voltage reference, sub-regulator, internal oscillator, control logic, and an output current amplifier. Programmable level shifting compensates for sensor DC offsets. Selectable up- and down-scale output indicates out-of-range and burn-out per NAMUR NE43. Automatic reset is initiated when supply is lost.

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Same functionality and pinout but is not an equivalent to the compared device:
XTR105 ACTIVE 4-20mA Current Transmitter with Sensor Excitation and Linearization Non-programmable. Does not include 5V regulator. 2 matched 800uA current sources instead of 500uA sources.
XTR106 ACTIVE 4-20mA Current Transmitter with Bridge Excitation (2.5-V or 5-V reference) And Linearization Non-programmable. 5.1V regulator instead of 5V. Includes 2.5V and 5V voltage references. Does not include matched current sources.
Similar but not functionally equivalent to the compared device:
XTR112 ACTIVE 4-20mA Current Transmitters with Sensor Excitation (2 x 250-µA) and Linearization Non-programmable device offers a regulator (5.1-V), two excitation sources (250-µA), and linearization circuitry

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 5
Type Title Date
* Datasheet 4-20mA, Two-Wire Transmitter, 'Smart' Programmable with Signal Conditioning datasheet (Rev. C) Jul. 12, 2005
User guide XTR108EVM-USB Evaluation Board and Software Tutorial (Rev. A) Sep. 15, 2016
Application note 4Q 2011 Issue Analog Applications Journal Nov. 09, 2011
Application note Analog linearization of resistance temperature detectors Nov. 09, 2011
User guide XTR108EVM User's Guide (Rev. A) Oct. 27, 2005

Design & development

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

Hardware development

EVALUATION BOARD Download
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 EVM MobileSensing EVM
Key Features DLP NIRscan DLP NIRscan Nano
(...)
EVALUATION BOARD Download
399
Description

Getting started with the XTR108 is made easy with this Evaluation Module. This kit provides the capability of calibrating the XTR108 system with high accuracy and interfacing with multiple types of RTDs or a built-in RTD Emulator circuit.

Features
  • Easy to Use and Fully Configurable
  • Supports Voltage and Current Output Modes
  • Post-Calibration Error of 0.1% or Better
  • RTD Emulator Circuit Onboard to Reduce Calibration Time
  • Calibrate Most Types of RTDs Over Wide Temperature Ranges
  • Suitable for Use as a Mass Production Calibration Tool

Software development

SUPPORT SOFTWARE Download
SBOC422.ZIP (6452 KB)
SUPPORT SOFTWARE Download
SBOC423.ZIP (337477 KB)

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 (...)
SCHEMATIC Download
SBOR015.PDF (535 KB)

CAD/CAE symbols

Package Pins Download
SSOP (DBQ) 24 View options

Ordering & quality

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  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

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