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TAS2505-Q1: External speaker diagnosis

Peter Xu
Expert 6275 points
Part Number: TAS2505-Q1
Other Parts Discussed in Thread: TAS2505, TPA2011D1

Hi team,

Regarding the external speaker diagnosis of the TAS2505 chip, the voltage of the ADC is about 1.2V when the speaker is connected.


Is there also an impedance to ground for SPKP/SPKM?
What is the impedance value?
I didn't find this in the datasheet.

Regards,

Peter

  • 0
    TI__Guru** 110835 points

    Hi Peter,

    The external diagnostic circuit is meant to be used while the Class-D output of TAS2505 is disabled. In this mode, the output is typically 2kOhms, similar spec to TPA2011D1 output impedance in shutdown mode.

    Best regards,
    -Ivan Salazar
    Applications Engineer