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TLV320ADC5140: SNR vs input amplitude

Anderson Cheng
Intellectual 1280 points
Part Number: TLV320ADC5140


Tool/software:

customer need a picture of SNR vs input amplitude like below, can we provide?

  • 0
    TI__Mastermind 47465 points

    Hi Anderson,

    We don't have SNR vs input amplitude because it's mostly redundant information. The SNR spec provided is measured with grounded (-infinity dBFS) input. So the SNR magnitude would lower by the same amount as the input signal.

    The only reason a customer would want this is to confirm that the SNR doesn't suddenly change at a certain input level. The THD+N vs amplitude graph can confirm this.

    At lower amplitudes, the harmonic content is 0, which means THD+N = SNR. As you can see the graph is flat, meaning the noise floor of the device does not change depending on input level.

    Best regards,
    Jeff McPherson