Precision Amplifiers

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Precision Amplifiers

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  • Forum Post: Re: xtr105 construction

    Ian Williams
    Hello Dennis, Thank you for your interest in the XTR105, and welcome to the TI E2E forums! Firstly, I calculated slightly different resistor values for your input range of 0-90C. I have attached my calculations page in MathCAD to this post. My values are as follows: Rz = 100 Rg = 70.346...
    on Mar 3, 2011

  • Forum Post: Re: Generate 4-20mA signal without loop power with XTR115U

    Ian Williams
    Kenneth, Thank you for your interest in the XTR115, and welcome to the TI E2E forums. Because of the way the internals of the XTR115 operate, it is not possible for it to function without being loop powered. The operation you describe in your 3-wire mode requires a 3-wire transmitter such as the...
    on Mar 4, 2011

  • Forum Post: Re: XTR112 current generator trouble.

    Ian Williams
    Matias, Neil is correct. Place a resistor between Vin- and Iret in order to keep the common-mode input voltage within the correct range of 1.25V to 3.5 V. The XTR112 data sheet recommends an Rcm = 3.3k, but for your configuration 2.1k might be a better choice. This biases Vin- at 1.5V, which gives you...
    on Jun 1, 2011

  • Forum Post: problem with Linearity XTR116

    Martin Kriz
    Hello I have a problem with linearity chip XTR116 , my circuit is connected according to FIGURE 1. Nonlinearity chip is 0.003%, potentiometer have nonlinearity under 0.1%. I need all nonlinearity under 0.1%, but when I measure this circuit, nonlinearity is bethween 0.3 to 0.4%. Y ou know, what could...
    on Aug 24, 2011

  • Forum Post: XTR115 beter temperature stable

    Marien Vermeulen
    Hi, I think I can use teh XTR115, it seems one of the best transmitters. But I need to improve the temperature stability; drift. As far I have calculated the device is for a 100 degrees temperature drift typical 0.0475% and maximal 0.275%. The datasheets give no curves about the offset and gain...
    on Sep 7, 2011

  • Forum Post: XTR106 Spice Model

    Matt Graham1
    I could not find an appropriate Spice/component model for the XTR106 4-20mA current transmitter IC. Has anyone created a Spice/component model, or know of a similar chip (TI or otherwise) that can be used for modeling? Thanks, -Matt
    on Oct 31, 2012

  • Forum Post: RE: XTR115 followed by a step-down converter

    Irfan Maqsood
    Hi Colin, I have sent you an email in order to get help on your proposed solution.
    on May 15, 2013

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