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PGA970: how do I connect a Wheatstone bridge to PGA970?

Part Number: PGA970

Hello

we are developing a variable reluctance differential pressure sensor .it has two inductors.

we are going to use two resistances and the two inductors to form a wheatstone bridge.

could you tell me how I connect a wheatstone bridge to PGA970?

Thank you.

Best regards,

Weiming Zhang

5 Replies

  • Weiming,


    I've moved this post to the Pressure Sensing Forum, where the PGA970 is supported. I think you'll find an answer here.


    Joseph Wu
  • Hello Weiminig,

    The PGA970 device is actually an LVDT (Linear Variable Differential Transformer) device. The LVDT is an accurate position sensing technology. So far I have not heard of a pressure sensing application that employs LVDT.

    The PGA970 will not accept a wheatstone bridge, due to the fact that the LVDT sensor connects the secondary inductors directly to the input of the device.

    PGA devices from Texas Instruments that do support a wheatstone bridge are: PGA900, PGA400, PGA308, PGA309, PGA300.

    Regards,
    Viktor.
  • In reply to Viktor Tasevski:

    Really? but Analog Devices company AD698 can accept a wheatstone bridge.
  • In reply to Viktor Tasevski:

    Hello Viktor Tasevski,
    How can I connect a 3-Wire LVDT to PGA970
  • In reply to XF ba:

    Hi XF,

    Please see the attached drawing.

    Regards

    Viktor.

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