ad712jn replacement

bernat · 16th December 2008, 11:06 PM

Hi, I have a digital crossover and the output opamps are Ad712jn, is possible to replace them with a better ones, any suggestions? thanks in advance

deuginthesky · 17th December 2008, 05:47 PM

You can try AD823, AD8620, LM4562, OPA 627x2...

bernat · 17th December 2008, 09:05 PM

Ok, i will try some of them, do you know if is necessary the bypass cap for avoid oscillation problems?
thanks

bernat · 18th December 2008, 06:29 PM

The AD712 is Jfet and The LM4562 is bipolar, I think I read is problematic to swap jfet with bipolar, I'm correct?

Mooly · 19th December 2008, 10:19 AM

You need to examine the circuit to be sure. It's not neccessarily a problem, but it is something to be aware of. Bipolar types may give considerably higher offset voltages, again depending on the circuit implementation.

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17th December 2008, 05:47 PM	#2
deuginthesky diyAudio Member Join Date: Jan 2007 Location: europe	You can try AD823, AD8620, LM4562, OPA 627x2...

17th December 2008, 09:05 PM	#3
bernat diyAudio Member Join Date: Dec 2008	Ok, i will try some of them, do you know if is necessary the bypass cap for avoid oscillation problems? thanks

18th December 2008, 06:29 PM	#4
bernat diyAudio Member Join Date: Dec 2008	The AD712 is Jfet and The LM4562 is bipolar, I think I read is problematic to swap jfet with bipolar, I'm correct?

19th December 2008, 10:19 AM	#5
Mooly diyAudio Moderator Join Date: Sep 2007	You need to examine the circuit to be sure. It's not neccessarily a problem, but it is something to be aware of. Bipolar types may give considerably higher offset voltages, again depending on the circuit implementation.