minimum gain for LM1875

Leolabs · 14th November 2006, 12:06 AM

I'm planning to go for x10 rather than the usual x20 or more,just wondering what the minimum usable???x5???

CarlosT · 14th November 2006, 12:08 AM

Supposedly anything around 10 or lower, then you're risking oscillation...whatever that means

Leolabs · 14th November 2006, 01:12 AM

So what's your recommendation??Still stick to the usual x20??

Bob0513 · 14th November 2006, 01:53 AM

The datasheet states the LM1875 is designed to be stable at gains of 10 or higher. Probably anything greater than around 12 will be fine in most designs. With gains less than about 12 you will have to design your board or p2p system well to prevent instability.

14th November 2006, 12:06 AM	#1
Leolabs diyAudio Member Join Date: Dec 2004 Location: Bukit Mertajam	minimum gain for LM1875 I'm planning to go for x10 rather than the usual x20 or more,just wondering what the minimum usable???x5???

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14th November 2006, 12:08 AM	#2
CarlosT diyAudio Member Join Date: Oct 2006	Supposedly anything around 10 or lower, then you're risking oscillation...whatever that means

14th November 2006, 01:12 AM	#3
Leolabs diyAudio Member Join Date: Dec 2004 Location: Bukit Mertajam	So what's your recommendation??Still stick to the usual x20??

14th November 2006, 01:53 AM	#4
Bob0513 diyAudio Member Join Date: Feb 2006 Location: home	The datasheet states the LM1875 is designed to be stable at gains of 10 or higher. Probably anything greater than around 12 will be fine in most designs. With gains less than about 12 you will have to design your board or p2p system well to prevent instability.

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