low noise op amp's

rjenkins

Joined Nov 6, 2005
1,013
Extra info:
The INA217 is one of the best spec audio devices, it's the same pinout as the INA126 but significantly lower noise and a much better gain/bandwidth figure - around 40KHz at a gain of 1000...

This is the original part I was going to use in my old design, but at the time it was in short supply and expensive; the INA126 was a drop-in replacement with adequate performance for my voice-bandwidth requirement.

The INA217 is also the replacement for the original SSM2017 low noise audio amp.
Datasheet here: http://focus.tij.co.jp/jp/lit/ds/symlink/ina217.pdf
 

Thread Starter

gusmas

Joined Sep 27, 2008
239
Hi Gusmas
Google the term "gain bandwidth product" and you will find out why you have such a poor bandwidth. A solution will be to use several gain stages (as mentioned by rjenkins). If you cascade 3 stages with gain 10, you will get a total gain of 10*10*10.
Ps could not find your microphone on google, is the number correct?
yeah the number is correct for the mic i also could not find it , probaly coz its a cheap mic. I know about cascading op amps but my problem with that is to understand a datasheet because a datasheet has so much information on it i dont know where i should look.
 
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