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tlv320aic3104: Pre-programmed HPF Coefficients

DOUG BOWLUS
Prodigy 40 points

Part Number: TLV320AIC3104

Hi,

Can you provide the corresponding N0, N1, D1 coefficients when using the pre-programmed high pass filter values controlled via Register 12 bits 4 to 7? 

The 3 different filter settings are listed below:

01: Left-ADC high-pass filter –3-dB frequency = 0.0045 × ADC fS

10: Left-ADC high-pass filter –3-dB frequency = 0.0125 × ADC fS

11: Left-ADC high-pass filter –3-dB frequency = 0.025 × ADC fS

Thanks!

  • 0
    TI__Guru* 84915 points
    Hi, Doug,

    The corresponding N0, N1 and D1 coefficients are listed below:

    01: Left-ADC high-pass filter –3-dB frequency = 0.0045 × ADC fS
    N0: 0x7E37
    N1: 0x81C9
    D1: 0x7C6F

    10: Left-ADC high-pass filter –3-dB frequency = 0.0125 × ADC fS
    N0: 0x7B28
    N1: 0x84D8
    D1: 0x7652

    11: Left-ADC high-pass filter –3-dB frequency = 0.025 × ADC fS
    N0: 0x76A9
    N1: 0x8957
    D1: 0x6D53

    However, there's no need to write these coefficients since these are pre-configured HPF. In case you require to get different filter coefficients, I would recommend to take a look at this tool:

    www.ti.com/.../COEFFICIENT-CALC

    Best regards,
    Luis Fernando Rodríguez S.