opa549 E/S

jaudio · 12th January 2005, 03:29 PM

Has anyone used a led on pin 9 to monitor thermal shutdown? How is it wired
end connected to pin 9 and one end to pin 6?

What's the bandwidth for a voltage gain of 21?

pinkmouse · 12th January 2005, 03:41 PM

All the info you need is in the datasheet...

jaudio · 12th January 2005, 04:27 PM

Is that figure 10 on the datasheet but without 74hct04?

I see gain-bandwidth product and slew rate vs temperate but not the bandwidth at a certain gain.

pinkmouse · 12th January 2005, 04:33 PM

I suspect they use the gate to get clean switching, the e/s pin output may be a little messy to drive the LED direct. The pdf is on my other machine, but I seem to remember that gain v. frequency is on the first page of graphs.

jaudio · 12th January 2005, 04:44 PM

gain v. frequency is not on the datasheet I have.

Under figure 4 it reads" External logic circuitry or an led can be used to indicate if the output has been thermally shutdown"

pinkmouse · 12th January 2005, 05:01 PM

I will have a look later when I get back home.

Alcaid · 12th January 2005, 07:50 PM

Gain vs. Freq. and phase:

pinkmouse · 12th January 2005, 09:58 PM

Thanks mate, I was fairly sure it wasn't my imagination!

jaudio · 12th January 2005, 10:17 PM

My apologies, I was wrong.

pinkmouse · 12th January 2005, 10:20 PM

No probs. Sometimes we all can't see the wood for the trees...

12th January 2005, 03:29 PM	#1
jaudio diyAudio Member Join Date: Oct 2004	opa549 E/S Has anyone used a led on pin 9 to monitor thermal shutdown? How is it wired end connected to pin 9 and one end to pin 6? What's the bandwidth for a voltage gain of 21?

12th January 2005, 03:41 PM	#2
pinkmouse diyAudio Moderator Join Date: Apr 2002 Location: Chatham, England	All the info you need is in the datasheet... __________________ Al I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while. Charles Fort

12th January 2005, 04:33 PM	#4
pinkmouse diyAudio Moderator Join Date: Apr 2002 Location: Chatham, England	I suspect they use the gate to get clean switching, the e/s pin output may be a little messy to drive the LED direct. The pdf is on my other machine, but I seem to remember that gain v. frequency is on the first page of graphs. __________________ Al I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while. Charles Fort

12th January 2005, 05:01 PM	#6
pinkmouse diyAudio Moderator Join Date: Apr 2002 Location: Chatham, England	I will have a look later when I get back home. __________________ Al I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while. Charles Fort

12th January 2005, 09:58 PM	#8
pinkmouse diyAudio Moderator Join Date: Apr 2002 Location: Chatham, England	Thanks mate, I was fairly sure it wasn't my imagination! __________________ Al I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while. Charles Fort


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12th January 2005, 04:27 PM	#3
jaudio diyAudio Member Join Date: Oct 2004	Is that figure 10 on the datasheet but without 74hct04? I see gain-bandwidth product and slew rate vs temperate but not the bandwidth at a certain gain.

12th January 2005, 04:44 PM	#5
jaudio diyAudio Member Join Date: Oct 2004	gain v. frequency is not on the datasheet I have. Under figure 4 it reads" External logic circuitry or an led can be used to indicate if the output has been thermally shutdown"

12th January 2005, 10:17 PM	#9
jaudio diyAudio Member Join Date: Oct 2004	My apologies, I was wrong.

12th January 2005, 10:20 PM	#10
pinkmouse diyAudio Moderator Join Date: Apr 2002 Location: Chatham, England	No probs. Sometimes we all can't see the wood for the trees... __________________ Al I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while. Charles Fort

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