1
\$\begingroup\$

I'm reading through the datasheet of the TPA311x family. I'm looking for the input range for pins INPR and INPL but I cannot find this information. I see the absolute maximum ratings, but it's not what I need. I'm interested in the maximum recommended input range for the audio signal.

I also measure an offset of about 2.90V on those pins, but in the ds I can't find this value neither.

If it's not declared, is it safe to use all the available swing, i.e. 2.90V ±2.90V? It means the input signal might swing from 0.00V to 5.80V.

\$\endgroup\$
3
\$\begingroup\$

I also measure an offset of about 2.90V on those pins, but in the ds I can't find this value neither.

The DS states the pins are biased at 3 volts (page 2).

I'm looking for the input range for pins INPR and INPL but I cannot find this information.

You take the gain value (programmed at power up) and reverse back from the preferred maximum peak-to-peak output voltage (supply dependent and dictated by your preferred worst case distortion levels) to get the required peak-to-peak input signal.

\$\endgroup\$
  • \$\begingroup\$ Ok, it's hidden in the description of the pins at page 4, indeed. I was looking in the specification tables. Got the right procedure to calculate the input range. Thanks. \$\endgroup\$ – Mark Sep 12 at 12:34

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.