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PGA117 Shutdown Mode: Safe Apply Voltage to Inputs?

Other Parts Discussed in Thread: PGA117

Hello,

I see that you can shutdown the PGA117 via SPI. However, I couldn't find anything in the data sheet that states whether or not it is safe to apply any type of voltages if I either it shutdown via SPI or cut the power source. Will the PGA117 be damaged if I apply voltages to the inputs while it is off? Thank you.

  • Hello Edmond,

    There is no problem with applying voltage to the PGA117 inputs while in shutdown mode with power applied. However, if you remove the power supply AVDD, you could possibly damage the device if you do not remove the input as well.

    If you look at the Absolute Maximum Ratings table (copied below), you can see that the maximum input ratings are given relative to GND and AVDD. Ensure that you stay within these ratings to avoid damage to the IC.

    Best regards,

    Ian Williams
    Linear Applications Engineer
    Precision Analog - Op Amps