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TLV320DAC3101: DRC HPF and LPF

na na78
Guru 16770 points
Part Number: TLV320DAC3101

Hi

Could you please explain how DRC high-pass and low-pass filter work?

According to explanation from datasheet P.36, the cutoff of high-pass filter is 0.00166 x DAC_fs, and low-pass is 0.00033 x DAC_fs in default.
If fs is 48KHz, cutoff for high-pass would be 79.68Hz and low-pass would be 15.84Hz.

However, cutoff would be 4Hz for high-pass and 8Hz for low-pass if calculation is based on reset value from Table 6-3.

Which calculation is correct? And how does these filter work in device operation?

BestRegards

  • 0
    TI__Guru** 109315 points
    Hi Na Na,

    You should consider the register table default values as the correct ones. However it is recommended to leave the DRC filter coefficients as the default values for a better performance across different sampling rates. The DRC filters are used for the energy estimation function and audio frequency range is not related to this function.

    Best regards,
    -Ivan Salazar
    Applications Engineer - Low Power Audio & Actuators
  • 0 in reply to Ivan Salazar
    Guru 16770 points
    Hi Ivan

    Thank you for your reply.

    BestRegards