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Original question:

PGA400Q1EVM: About TPIC83R00 BENCH

PGA400-EP: About Gain 2 Setting and Vout

user733164
Prodigy 60 points
Part Number: PGA400-EP

Hello,

In Page 20th, PGA400-EP datasheet, "For a given sensor, the drive current IC should be adjusted to keep VOUT < 1.65 V over the expected operating conditions of the sensor to avoid saturating the ADC input.“

What kind of relation between Vout and Gain 2 Setting is?

Thank you!

Shuwei

  • 0
    TI__Mastermind 31655 points

    Hi Shuwei,

    There may be some confusion about which VOUT is being mentioned in the section of the datasheet you are referring to. The VOUT in that section is only referring to the output of the Self Oscillating Demodulator block. In this case, Gain 2 has no effect on the output of the Self Oscillating Demodulator block since it is further down the receive chain.

    See the block diagram below:

    The VOUT of the Self Oscillating Demodulator block is calculated using the formula here:

    Regards,