How to set the gain of the TDA7491 HV 30/31 pin GAIN 0/ GAIN pin?

ouyang · ‎2025-03-10

How to set the gain of GAIN0/GAIN1 pins 30/31 of TDA7491HV?

Peter BENSCH · ‎2025-03-10

Welcome @ouyang, to the community!

You can configure the two pins according to the desired closed-loop gain. According to the data sheet, table 7, you can choose between 20/26/30/32dB.

In the picture you have inserted, both pins are set to VDDS = H, which corresponds to an open-loop gain of 32dB.

Does it answer your question?

Regards
/Peter

In order to give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

AScha.3 · ‎2025-03-10

See ds , figure 22 :

Gain settings: 0+0 V -> 20dB , 3+3 V -> 32dB , etc.

If you feel a post has answered your question, please click "Accept as Solution".