Hi,
The TDA8920 reference schematic suggest a 220pF on the differential audio input, see picture (IN1P - IN1M). According to the specifications, the input impedance (Zi) of the TDA8920 is typically 68Kohm. From my calculation (Fc = 1 /(2pi * R * C) gives a lowpass filter value of 10.6Khz which does not make sense. What is wrong with my calculation?
The TDA8920 reference schematic suggest a 220pF on the differential audio input, see picture (IN1P - IN1M). According to the specifications, the input impedance (Zi) of the TDA8920 is typically 68Kohm. From my calculation (Fc = 1 /(2pi * R * C) gives a lowpass filter value of 10.6Khz which does not make sense. What is wrong with my calculation?
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