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THS7001: Using with single supply

Tim Hayford90
Prodigy 20 points
Part Number: THS7001

We are designing in this THS7001 where we would normally use +12V, GND and -12V. Instead, we are wondering if we can just use +24V, and tie GND to VCC- and tie a virtual GND to the VREF_PGA pin.  There is no mention of a single supply in the data sheet. Does this part support this type of configuration?

  • 0
    TI__Genius 17076 points
    Hi Tim,

    Voltage is just a measure of potential between two nodes. An amplifier will not know the difference between -12V to 12V and 0V to 24V as long as every node in the circuit is also shifted up by 12V.


    Best regards,

    Sean
  • 0 in reply to Sean Cashin
    Prodigy 20 points

    For a typical Op-Amp design, I understand that I can just shift the voltage wherever I want. My concern with the THS7001 is that it has VCC+ VCC- and GND. I'm fine shifting VCC+ and VCC- around, but can I shift the GND?  Or would I leave the GND connected to actual GND? If so, can the Op Amps handle +24V on them when the part is still referenced to GND?

  • 0 in reply to Tim Hayford90
    TI__Genius 17076 points
    Hi Tim,

    The thermal pad is electrically isolated from the amplifier, so it can be tied to any potential. Otherwise, if you shift the supplies +12V, everything connected to the amplifier also has to be shifted +12V, including the "GND" pin, the digital pins, reference voltages, and shutdown.

    Best regards,

    Sean