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TLV320AIC34: ADC Overflow Flag

Errol Leon6
Expert 5850 points
Part Number: TLV320AIC34

Hello team,

I have a customer is looking for details on the TLV320AIC34 ADC overflow flow flag for the left and right ADC. While the customer can infer that means that you have a voltage of greater than the Analog Voltage (?) it will be set.

1)      Does that mean that the count output will saturate (Be full scale) or will it roll over?

2)      Are there any recommended application notes for how to handle an overflow? (Adjusting gains ect)

Thanks!

Errol

Field Applications Engineer

  • 0
    TI__Mastermind 30210 points
    Errol,

    These are not clip indicators. They are data overflow flags. so imagine that the data is being held in a buffer, but the WCLK suddenly stops running. your ADC is going to keep spitting new values into that Buffer, but none of them get transferred out. Typically these registers are not needed. But they can help to troubleshoot issues, as they are "sticky" bits.

    There is no clip indicator register on the AIC34,
    1) It will not "roll over" it will provide a full-scale output for as long as the AC component is higher than 1V peak. (unless of course the input is a DC voltage)
    2) The over flow bits are there for troubleshooting or diagnostics, For issues with volume control there is an AGC, but no ALC/limiter.

    best regards,
    -Steve Wilson