OPA1679: input check

Jeff YANG

Part Number: OPA1679

Hi,

I have ask OPA1679 question in below link on E2E.

My customer is asking if they use OPA1679 VCC is +/- 12V, the input source need any change? Need change to GND?

https://e2e.ti.com/support/audio-group/audio/f/audio-forum/1009760/opa1679-reference-design-for-single-end-audio-input-to-differencial-audio-output?tisearch=e2e-sitesearch&keymatch=opa1679#

Thanks!

over 2 years ago

0 Chris Featherstone over 2 years ago

TI__Mastermind 18875 points

Jeff,

Yes if running off of split supply +/-12V, the common mode voltage should be at mid supply or ground. I have updated the TINA simulation below to reflect this.

5037.OPA1679 Single to Differential.TSC

0 Jeff YANG over 2 years ago in reply to Chris Featherstone

Genius 4650 points

Hi Cris,

Would you please share the TINA simulation as a figure?

I have no TINA tool so can't open it.

Thank you!

Jeff

+1 Chris Featherstone over 2 years ago in reply to Jeff YANG

TI__Mastermind 18875 points

Jeff,

Below is the schematic. You can install TINA Ti for free in the link below as well.

https://www.ti.com/tool/TINA-TI

0 Jeff YANG over 2 years ago in reply to Chris Featherstone

Genius 4650 points

Hi Chris,

thanks for your help.

Jeff

Audio

Audio forum

OPA1679: input check