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Many thanks for this reply !

Best regards

        Laurentiu Chitu

If I use tpa2008 as analog modulator is ok ?

 Have a good Signal-to-noise ratio (96db).

Is necessary to connect  output load to tpa2008 in this case?

Or I connect  directly to entry (tas5631).

rgds

 Chitu Laurentiu

Hi, Chitu,

TPA2008D2 will work as a modulator, just connect the two outputs to the two inputs on the TAS5631. Just make sure you run the TPA2008D2 at 4.2V or less, or you'll damage the input pins on the TAS5631. I'd recommend 3.3V.

And, you're right, you should add some nominal load to the TPA2008D2 output. Something like a 1 kohm resistor across its outputs should be fine.

I'd just liked to reiterate what Kim said -- if you want analog input, by far the best way to achieve that is to use TAS5630!

-d2

Hi Don!

Yes I know about TAS 5630 (analog inputs) but I have already the TAS 5631 .

(sorry I have not said  this before )

Many Thanks!

rgds

      Laurentiu Chitu

Hi, Chitu,

May I ask where you got the 5631? Do you have a part, or an EVM?

What is it you're trying to do? What is your application?

If you are uncomfortable stating this information on the forum, you may add me as a friend, and then we can take this discussion off the forum.

-d2

Hi Don !

Is not a problem[:)]

We engineer a colleague (Bucharest) sent me 2 pieces for testing,not EVM (I think is  samples )

I wanted to test them because I saw on forums only good words for new models of circuit (classD)

rgds

                   Laurentiu Chitu

Hi, Chitu,

If you send me your address (privately), I can see if I can find a couple TAS5630s in the lab for you. It pains me to see people work on non-optimal solutions. I think you will never be able to achieve the same level of performance as the TAS5630.

-d2

Don Dapkus

I think you will never be able to achieve the same level of performance as the TAS5630.

Hi!

Are of the same opinion!

I will send the adress!

Many thanks for all

Rgds