TPA4861: TPA4861 differential input

Ernesto Sornosa Alba

Part Number: TPA4861
Other Parts Discussed in Thread: LM4890

Hi,

I have one audio development with TPA4861 where I need to use a differential input. There is not any recommended design in datasheet for this, but I have seen in the datasheet of TPA4890 a design reference of this kind of solution with additional resistor R6.

I have implemented this reference design, and it is working properly, but I don't know if there may be some problems in the future.

Please, can somebody give me some feedback?

Thanks

over 5 years ago

0 Luis Fernando Rodriguez S. over 5 years ago

TI__Guru* 84915 points

Hi, Ernesto,

Welcome to E2E and thank you for your interest in our products!

Excuse me, I couldn't find the design reference of the device that you mentioned. Could you share it, please? Just to ensure that it won't cause any problem in the future.

In addition, you may take a look at the TPA4861 EVM schematic. It may be an alternative for your design:

http://www.ti.com/lit/ug/slou004/slou004.pdf#page=13

Best regards,
Luis Fernando Rodríguez S.

0 Ernesto Sornosa Alba over 5 years ago in reply to Luis Fernando Rodriguez S.

Prodigy 20 points

Hi Luis,
I have mispelled reference. It is LM4890. You can check reference design in page 23 of datasheet:
www.ti.com/.../lm4890.pdf
Regards

0 Luis Fernando Rodriguez S. over 5 years ago in reply to Ernesto Sornosa Alba

TI__Guru* 84915 points

Hi, Ernesto,

Thank you for the reference link.

There's no problem. This design is compatible with the TPA4861. There shouldn't be any problem related to the circuit design in the future.

Please let us know if you have additional questions or comments. We will be glad to help you.

Have a good day!

Best regards,
Luis Fernando Rodríguez S.

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TPA4861: TPA4861 differential input