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Original question:

TLV320ADC3140: DC-coupled input mode with AC-coupled capacitor

TLV320ADC3140: DC-coupled input mode with AC-coupled capacitor

Kuramochi Tadahiko
Guru 28715 points
Part Number: TLV320ADC3140

Hi,

I post the same question as to the related thread.

Is an AC coupled capacitor allowed on DC-coupled input mode as below?

Best Regards,

Kuramochi

  • 0
    TI__Guru 62945 points

    Hi Kuramochi,

    Yes, this is allowable as there is still a weak internal bias even in DC coupled mode.  That said, this doesn't make sense as it suffers from the slight performance degradation of operating in DC coupled mode while actually being AC coupled.  They should use AC coupled mode.