• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 30 subscribers
  • Views 1666 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TAS5613 single ended vs differential

Bruce52209
Prodigy 240 points
Other Parts Discussed in Thread: TAS5613

I am testing a 5613 design and I am finding that given the same level input:  The output from the 5613 evaluation card is greater than the output from our own designed card.

 

One of the differences between the cards is that the 5613 evaluation card is driving the inputs to the 5613 differentially and our own designed card is driving the 5613 inputs single ended.

 

So my question is… does driving the 5613 inputs differentially result in a higher output level compared to driving them single ended?

 

Thanks,

Bruce

  • 0
    TI__Mastermind 18510 points

    Bruce, all that should matter is the signal difference between the inputs to TAS5613.  Of course, if the difference in our EVM is higher than the difference on your board the output of TAS5613 will be higher in the EVM.  The EVM includes a preamp with gain of about 7dB (10k/4.4k), and it amplifies the EVM signal by that amount, whether the EVM input is differential or single ended (with one side at ground).

    Can you post a schematic of what you are doing?  Please note the inputs of TAS5613 must be AC coupled, because DC coupling will alter the output bias.

    Best regards,

    Steve.

  • 0 in reply to SteveCrump
    Prodigy 240 points

    Oops.  I missed the 7dB gain in the EVM.  So my pre-amplifier will need more gain to get to where we want it.

     

    Thanks for your help.

    -Bruce