I/V OPA627's getting warm??

MWP · 17th September 2003, 04:42 AM

Hi guys,

Ive got 6 OPA627's as a IV in my DAC.

Is it normal for them to get quite warm to the touch?
I wouldnt have thought so....

They are running at +-12V.

Thanks.

MWP · 17th September 2003, 06:07 AM

Details of the DAC are here:
http://www.overclockers.com.au/~mwp/dac3/

peranders · 17th September 2003, 08:09 AM

Yes, check the normal current consumption of the OPA627. It's rather thirsty.

MWP · 17th September 2003, 09:39 AM

Hmmm, so it is....

Thanks.

jonclancy · 17th September 2003, 10:12 AM

Sorry, I'm being ignorant, but the question has been burning for a long time and I have yet to stumble across the meaning:

What is I/V? I feel like it is something to do with signal inversion...

Thanks in advance for answering what is probably an obvious question.

Jon

bigparsnip · 17th September 2003, 10:22 AM

Almost all DAC chips give their output as a varying current rather than voltage, and as most Hi-Fi uses a voltage for signals rather than current, the current (I) signal must be converted into a voltage one (V).

jonclancy · 17th September 2003, 10:37 AM

Thanks very much indeed BP!!

Jon

17th September 2003, 04:42 AM	#1
MWP diyAudio Member Join Date: Oct 2002 Location: Adelaide, South Australia	I/V OPA627's getting warm?? Hi guys, Ive got 6 OPA627's as a IV in my DAC. Is it normal for them to get quite warm to the touch? I wouldnt have thought so.... They are running at +-12V. Thanks.

17th September 2003, 08:09 AM	#3
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	Yes, check the normal current consumption of the OPA627. It's rather thirsty. __________________ /Per-Anders (my first name) or P-A as my friends call me

17th September 2003, 10:37 AM	#7
jonclancy diyAudio Member Join Date: Oct 2002 Location: UK	I am enlightened.... Thanks very much indeed BP!! Jon

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17th September 2003, 06:07 AM	#2
MWP diyAudio Member Join Date: Oct 2002 Location: Adelaide, South Australia	Details of the DAC are here: http://www.overclockers.com.au/~mwp/dac3/

17th September 2003, 09:39 AM	#4
MWP diyAudio Member Join Date: Oct 2002 Location: Adelaide, South Australia	Hmmm, so it is.... Thanks.

17th September 2003, 10:12 AM	#5
jonclancy diyAudio Member Join Date: Oct 2002 Location: UK	Sorry, I'm being ignorant, but the question has been burning for a long time and I have yet to stumble across the meaning: What is I/V? I feel like it is something to do with signal inversion... Thanks in advance for answering what is probably an obvious question. Jon

17th September 2003, 10:22 AM	#6
bigparsnip diyAudio Member Join Date: Apr 2003 Location: Cambridge	Almost all DAC chips give their output as a varying current rather than voltage, and as most Hi-Fi uses a voltage for signals rather than current, the current (I) signal must be converted into a voltage one (V).

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