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Texas Instruments' High-Performance 4-20mA Transmitter Targets
Temperature And Bridge Sensors'Smart' Programmable Device Reduces Manufacturing
Costs By Offering Digitally- Controlled Adjustments

TUCSON, Ariz., Jun 1, 2001 /PRNewswire via COMTEX/ -- Texas Instruments (TI)
Incorporated (NYSE: TXN) today announced a "smart" programmable 4-20mA
current-loop transmitter designed for temperature and bridge sensor
applications, as well as remote data acquisition, weighing systems, and
industrial process control. The high-performance XTR108 allows for digital
calibration of sensor and transmitter errors via a standard digital serial
interface, eliminating expensive potentiometers or circuit value changes.
Calibration settings can be stored in an inexpensive external EEPROM for easy
retrieval during routing operation. See http://www.ti.com/sc/aapxxxxu.

Digitally-controlled adjustments dramatically reduce manufacturing costs and
allow companies to build a single sensor design to serve a wide range of needs.
Individual units can be stocked and later programmed and reprogrammed for any of
hundreds of possible end-customer specifications (special temperature ranges,
etc.). Sensors can also be reprogrammed in the field, if necessary.

"By allowing the user to digitally adjust the gain, offset and linearity of the
analog output, the XTR108 eliminates the need for manual trimming of
potentiometers and the costs associated with this process," said John Brown,
strategic marketing engineer for TI's High-Performance Linear products.
"Furthermore, among the very few similar ICs on the market, the XTR108 provides
more versatile multi-channel input and excitation multiplexing."

Functionally, a 4-20mA transmitter provides accurate transmission of analog
signals from sensors (used to monitor physical parameters in industrial
processes such as temperature and pressure) to remotely located measurement
equipment. The sensor signal is amplified, linearized, and transmitted in the
form of current (no power supply required at the transmitter site). 4-20mA
current loops are not affected by line resistance and are much more immune to
electrical interference.

The XTR108's wide programmable gain amplifier (PGA) range allows full scale
inputs from 5 to 320mV. The all-analog signal path contains a built-in
sub-regulator, voltage reference, input multiplexer, autozeroed PGA, dual
programmable current-sources, linearization circuit, internal oscillator,
control logic, and an output current amplifier.

Current sources directed through the multiplexer can be used to excite RTD
temperature sensors, pressure bridges, or other types of transducers. The
XTR108's uncommitted op amp can be used to convert current into a voltage, or
for four-wire RTD circuits.

Available Today

The XTR108 is available now and is packaged in an SSOP-24. It is priced from
$3.45 in 1,000 piece quantities. The device is specified for -40 degrees Celsius
to +85 degrees Celsius temperature range.

Texas Instruments Incorporated is the world leader in digital signal processing
and analog technologies, the semiconductor engines of the Internet age. The
company's businesses also include sensors and controls, and educational and
productivity solutions. TI is headquartered in Dallas, Texas, and has
manufacturing or sales operations in more than 25 countries.

Texas Instruments is traded on the New York Stock Exchange under the symbol TXN.
More information is located on the World Wide Web at: http://www.ti.com.


     Please refer all reader inquiries to:  Texas Instruments Incorporated
                                            Semiconductor Group, SC-00177
                                            Literature Response Center
                                            P.O. Box 954
                                            Santa Clarita, CA  91380
                                            1-800-477-8924, ext. 4500

                    MAKE YOUR OPINION COUNT -  Click Here
               http://tbutton.prnewswire.com/prn/11690X38841746

SOURCE Texas Instruments Incorporated Semiconductor Group


CONTACT:          Texas Instruments Incorporated Semiconductor Group,
                  800-477-8924, ext. 4500

URL:              http://www.ti.com/sc/aapxxxxu
http://www.prnewswire.com

(C) 2001 PR Newswire.  All rights reserved.

-0-


KEYWORD:          Texas
                  Arizona
INDUSTRY KEYWORD: CPR
SUBJECT CODE:     PDT





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