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TAS2552: Does TAS2552 require to be calibrated for current and voltage sensing before using it?

Part Number: TAS2552


We are using two TAS2552 in our design and driving them using I2S.

We are trying to measure current and voltage of the two amps individually(configured for I/V data one at a time). We keep one amp idle and drive a sine wave on the second amp and measure I/V . In the next step we keep the second amp idle and run sine wave on first and measure I/V. The results are quite different although the I2C settings are exactly the same.

Any pointers to solve this issue is welcome.

Thanks in advance.