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TPA3136D2: Regarding to the resistance value

Masakazu Adachi
Intellectual 2500 points
Part Number: TPA3136D2

Hello team,

I received a question from the customer.

The datasheet shows a fixed gain of 26dB, but the customer is considering whether the gain can be changed by adjusting the input resistance value of the differential amplifier circuit shown in the red frame of the image below. The datasheet seems to show only a block diagram, so is it possible to tell me the resistance value here?

Regards,

Masakazu