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TPA2011D1: TPA2011D1YFFT gain is less than 2V/V.

Kungyeh Chen
Prodigy 70 points
Part Number: TPA2011D1

I've connected the TLV320AIC3104IRHBR's LEFT_LOP/M to the TPA2011D1YFFT and set the Gain to 2V/V.

The LEFT_LOP/M outputs 4Vp-p, but the TPA2011D1YFFT only outputs 6Vp-p.

Please assist me in reviewing the schematic to identify the issue.

  • 0
    TI__Guru** 101335 points

    Hi Kungyeh,

    Could you please comment where are you measuring the signal between CODEC and amplifier? Is it before or after R204/R206? I wonder if these resistors could load down the signal before getting to the amplifier inputs.
    As part of debugging, you may try replacing R204/R206 with 0Ohm.

    Best regards,
    -Ivan Salazar
    Applications Engineer