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XTR300EVM: I am new to using analog evaluation modules and trying to get a simple test set up.

Joe Morris
Prodigy 10 points
Part Number: XTR300EVM
Other Parts Discussed in Thread: XTR300, XTR111

I am new to using these types of devices and am trying to get a simple test set up to explore the features of them. When following the documentation for the device it calls for a two supply for each of the examples, however I do not have one available to me. Is there anyway to set this device up to use a standard 24V variable power supply to get a basic test going to explore the functionality of the device and get a better understanding of how it works. If there is not is there another device available that would be a fit in this application.

  • 0
    TI__Guru 54566 points

    HI Joe,

    The XTR300 device (and also the XTR300EVM evaluation board) requires bipolar supply; it requires a negative supply equal or more negative than V(-) <= -5V .

    The device can operate with asymmetrical voltage supplies, for example, V- = -10V and V+ = +24V.

    The reason is the device inputs and outputs require headroom from the supply rails for the device to work within the specified linear region.

    - The operational amplifier (OPA) requires input voltage and output voltage requires at least 3V above the negative supply and below the positive supply.

     

    - The instrumentation amplifier (IA) requires a input voltage range VCM that is at least 3V above the negative supply and 3V below the positive supply. 

    The device was characterized with a minimum supply of ±5V and maximum of ±22V, but you can certainly use asymmetrical voltage supplies such as V-=-10V and V+=+24V.

    The datasheet operating range specification only provides assurances with a negative supply equal or more negative than V- <= -5V. 

     

    Thank you and Regards,

    Luis

  • 0 in reply to Luis Chioye
    TI__Guru 54566 points

    HI Joe,

    The XTR111 is a similar 3-wire analog current output transmitter, that can operate with a single unipolar +24V supply, however, the functionality is not exactly the same.  The main difference is the XTR111 is used primarily as a current output transmitter/driver, while the XTR300 can be configured as either a voltage output driver, or a current output driver.

    Thank you and Kind Regards,

    Luis