DRV134 pcb

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The pcb look like this
 

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I thought about to have SMD opamps on the solder side along with 0.1% resistors. It's not impossible to fix this. Is there any interest for this? For building a DRV134 solution you'll need three opamps and a dozen of resistors but they have to be with tight tolerances in order to get good performance.
 
This is a unbalanced to balance driver. If you already have a balanced signal you won't need this converter but I see what you mean. You could use a balanced opamp like OPA1632.

As I see it you can connnect the DRV134 via a cap only. I haven't it though. Anybody who has?

You have a THAT chip which is compatible.
 
I have debugged the boards now and two errors were but the were minor.

Connector X4 should be +V GND -V, (is +V GND -V, just swap + and -)

Connector X3 should be -OUT (inverting output)

Connector X2 should be +OUT (non-inverting output)

It was right to connect the input coupling cap directly to pin 4 without any pulldown resistors.
 
I have debugged the boards now and two errors were but the were minor.

Connector X4 should be +V GND -V, (is +V GND -V, just swap + and -)

Connector X3 should be -OUT (inverting output)

Connector X2 should be +OUT (non-inverting output)

It was right to connect the input coupling cap directly to pin 4 without any pulldown resistors.
Will you do another rev or is this the gotcha we need to be aware of?

Peter
 
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