Balanced Line Driver with DRV134

[Eastwood]

Ah, I didn't realise it would be a problem as it's only for personal use, but I can see why he wouldn't want the schematics all over the web...

Here's my original sketch minus the input side of the op amp; all thats missing is an RF filter, a DC drain resister and a DC blocking cap.

 

[AndrewT]

Here's....
Where?

 

[Eastwood]

I'm not sure what the issue is as I can view it at home, on my phone and at work in Chrome, Firefox & I.E.

There is only one picture, perhaps my wording was misleading in the second sentence; my apologies.

 

[epicyclic]

Hello,



The problem I've noticed is that there is a difference of between 20mA - 50mA (I built serveral circuits) on the + & - output of the DRV134. Any idea what may be causing this?

So you are measuring the available output current ??

 

[Eastwood]

Sorry, that's a typo, should be mV.

 

[epicyclic]

Are you measuring the DC offset of each output with respect to ground . If so its common mode offset voltage and is quoted as +/- 50mV typical and +/- 250mV max on the data sheet . Differential offset between the 2 outputs is +/- 1mV typ and +/-10mV max .

 

[Eastwood]

I'm measuring Vpk-pk on each output with respect to ground when applying a 1Khz sine wave at +4dBu.

 

[gmphadte]

Connect load resistors and check.

Gajanan Phadte

 

[epicyclic]

Connect 0.1% tolerance load resistors as fig 5 data sheet ...Signal Balance Ratio.....and measure .