DRV134 pcb

peranders · 29th August 2009, 07:38 PM

http://sjostromaudio.com/ubc01r0.pdf

I got inspired from someone (can you guess?) to make a DRV134 pcb with built-in regulators, two types of them and the discrete one can handle pretty high input voltage. The design comes right of my head and I haven't tested it in any way.

peranders · 30th August 2009, 08:08 AM

The pcb look like this

peranders · 30th August 2009, 08:09 AM

... and this

peranders · 5th September 2009, 04:04 PM

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.

AndrewT · 9th September 2009, 04:19 PM

does the DRV need a input offset current feed resistor?

Why exclude the possibility of using balanced input?

Do other balanced opamp drivers fit the pin configuration of the DRV134?

peranders · 9th September 2009, 06:28 PM

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.

peranders · 10th September 2009, 09:56 AM

Quote:

Originally Posted by peranders

..I haven't it though.

...tested it...

Shaun · 25th September 2009, 12:54 AM

Hi Per-Anders

Do you have more of these PCB's? I need two.

peranders · 25th September 2009, 05:14 AM

I will have pcb's in a few days.

peranders · 7th October 2009, 01:29 PM

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.

29th August 2009, 07:38 PM	#1
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	DRV134 pcb http://sjostromaudio.com/ubc01r0.pdf I got inspired from someone (can you guess?) to make a DRV134 pcb with built-in regulators, two types of them and the discrete one can handle pretty high input voltage. The design comes right of my head and I haven't tested it in any way. __________________ /Per-Anders (my first name) or P-A as my friends call me

5th September 2009, 04:04 PM	#4
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	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. __________________ /Per-Anders (my first name) or P-A as my friends call me

9th September 2009, 04:19 PM	#5
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	does the DRV need a input offset current feed resistor? Why exclude the possibility of using balanced input? Do other balanced opamp drivers fit the pin configuration of the DRV134? __________________ regards Andrew T.

9th September 2009, 06:28 PM	#6
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	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. __________________ /Per-Anders (my first name) or P-A as my friends call me

25th September 2009, 12:54 AM	#8
Shaun diyAudio Member Join Date: Aug 2001 Location: Cape Town, South Africa	Hi Per-Anders Do you have more of these PCB's? I need two. __________________ Shaun Onverwacht \|\|\|\|\|\|\|\|\|\| DON'T PANIC \|\|\|\|\|\|\|\|\|\|


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25th September 2009, 05:14 AM	#9
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	I will have pcb's in a few days. __________________ /Per-Anders (my first name) or P-A as my friends call me

7th October 2009, 01:29 PM	#10
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	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. __________________ /Per-Anders (my first name) or P-A as my friends call me

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