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XTR115: can XTR115 support nonlinear compensation for the sensor

Brian Li
Genius 13850 points
Part Number: XTR115
Other Parts Discussed in Thread: PGA309, XTR105, XTR106, XTR108

Hi team,

My customer is using our XTR115. And they saw this AN:

How to Design an Inexpensive HART Transmitter (Rev. A).pdf

They wonder when they use Sensor+opamp+XTR115，can XTR115 support nonlinear compensation for the sensor?

And they wonder can they not use DAC, only use MCU to do the compensation?

Thanks,

Brian

  • +1
    TI__Mastermind 26078 points

    Brian,

    No, this device is intended to be added to an additional amplifier and simply translate the voltage output to a 4mA to 20mA current output.  The device could be used in conjunction with a device like PGA309 which does do linearization of bridge sensors.  The PGA309 is a programable system on a chip type device designed to correct for drift and nonlinearity of bridge sensors.  The XTR108 is similar to PGA309 in that it is a programable device which will linearize and calibrate RTD sensors.  I think the device that you may be looking for is similar to XTR115 with a few additional features such as sensor linearization.  The XTR105 and XTR106 are simple resistor programable devices that offer linearization for bridge sensors and RTD.  I think the 104 and 105 are what you are looking for, but for completeness I provide the other options.

    Art