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Original question:

XTR116: Problem of heat generation of Q1 external transistor

XTR111: About analog signal voltage conversion

tossiy
Prodigy 50 points
Part Number: XTR111

I want to use a+5V power supply made with XTR111 for the power supply of an Instrumentation Amplifier.
However, the CPU's A / D input is the system's+5V supply.
How do I connect the analog output of an Instrumentation Amplifier to the A/D of the CPU?

  • 0
    TI__Intellectual 795 points

    Hello user4947084,

    If I understand correctly, your +5V supply generated by XTR111 (modified circuit) is used for powering an INA, but you need +5 V also for a CPU's positive supply, correct?

    Why are you looking to use the output of the INA as the supply to your CPU (if I understand your statement correctly)? The INA output will vary with the differential input voltage and might not provide a stable supply for your CPU. 

    Could you please provide a bit more information on your design? A schematic would be very helpful.  

    Regards,
    Vladimir

  • 0
    Guru 140200 points

    Hi User,

    I have absolutely no idea what you mean. Please discuss your problem in much more detail.

    Kai

  • 0 in reply to kai klaas69
    TI__Intellectual 795 points

    Hi user4947084, 

    It's been a few days since your last post on this topic. Would you be able to provide more information, so that Kai and I can answer your questions? 

    Regards,
    Vladimir