TAC5212: DAC Output check

Hi Ore,

Thanks for your feedback.

Then question would be, why we design input and output as a negative manner in bypass mode? IN1P -> OUT1M, IN1M -> OUT1P, why don't make it IN1P -> OUT1P, IN1M -> OUT1M?

Regards,

Will

Hi Ore,

Ore Ogundana said:

non-inverted signal. 

do you mean the red circle marked buffer is a non-inverted buffer? 

Customer get following set up:

Their test shows input signal and output signal are in same phase when using bypass mode;

That means the red circle circuit should be inverting buffer, rather than a non-inverting buffer.

Could you help check this?

Thanks and Best Regards,

Will

Hey Will, 

Thanks for the extra details. I am currently reviewing this, allow a response by the end of the week. 

Regards,

Ore. 

Hi Ore,

Thanks for support.

Could you help speed up this and feedback us by end of Thursday?

Understood.

Regards,

Ore. 

Hey Will, 

There is nowhere in the datasheet that suggests that the amplifier of the TAC5212 output stage is that of an inverted configuration. Its purpose is to amplify the post-processed signals leaving the DAC.   

To help figure out your in-phase output signal, try to configure the output source selection to reflect the analog bypass chain:

And make sure the output is configured as a differential pair:

Let me know how that works out. 

Regards,

Ore.