Product category:
Analogue and Mixed Signal ICs
News Release from: Texas Instruments (April 2001-March 2006) | Subject: XTR117
Edited by the Electronicstalk Editorial
Team on 21 October 2005
Current loop transmitter shrinks to
MSOP-8
Texas Instruments has released a high-accuracy 4-20mA transmitter in a miniature MSOP-8 package.
Texas Instruments has released a high-accuracy 4-20mA transmitter in a miniature MSOP-8 package Featuring low offset and span errors, the XTR117 offers simple overscale and noise resistant signalling with low power consumption (250uA maximum)
This article was originally published on Electronicstalk on 8 Nov 2004 at 8.00am (UK)
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The new transmitter, from the company's Burr-Brown product line, has a wide operating voltage range of 7.5 to 40V and is tolerant of power surges up to 50V.
Its small size and accurate 4-20mA output scaling are ideal for pressure, temperature and humidity transducers as well as industrial process monitors.
The XTR117 is robust in harsh electrical environments and has a generous 3.75mA at 5V (subregulated) available for external sensor conditioning circuitry power.
The current transfer function of x100 can easily be created for voltage output sensor conditioning circuits with one external scaling resistor.
The low quiescent current, accurate 4-20mA scaling (without calibration), small size and low cost of the XTR117 make it a clear choice over discrete implementations of this function.
The device operates over the extended industrial temperature range of -40 to +125C.
The XTR117 provides an excellent central building block for two-wire 4-20mA designs which can precondition sensor signals through digitally calibrated sensor signal conditioning chips (such as PGA309), low power microcontrollers (such as MSP430), or discrete combinations of instrumentation amplifiers and voltage references (such as INA122, INA118 and REF31xx), or low power op amps and voltage references (such as OPA335, OPA344 and REF32xx).
The XTR117 is available now in a MSOP-8 micro-package from TI and its authorised distributors.
The device is priced at $0.90 in 1000 piece quantities (suggested resale pricing).
A 3 x 3mm DFN-8 package option will be available in Q1 2006.
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