[sdiy] ultra low noise op amps

[Fernando de Izuzquiza]

Thank you John, they look very sexy

I wonder, would they be a good candidate for SSM2164 Irwin VCAs?
They seem both good for audio and with quite low input offset voltage...

Best to all!

Fernando



El 19/09/2007, a las 1:21, John Mahoney escribió:

> Looking for the lowest distortion and noise? National Semi has some  
> fairly new op amps (supposedly announced on July 23) with a mere  
> 0.00003% THD+noise, making for a dynamic range of 130dB.
>
> Some additional specs:
> 	DC Gain Linearity Error: 0.000009% (quite good, no?)
> 	Input Offset Voltage  0.1mV (typ.)
> 	Input Bias Current  10nA (typ.)
>
> That last number doesn't match the LT1013's "Guaranteed Offset  
> Current" of 0.8nA. Am I comparing apples to apples?
>
> Anyway, the amps are the LME49710, LME49720 and LME49740 (single,  
> dual, quad) for rails up to +/-17V. Available in SOIC and DIP.  
> There's also the LME48960 dual for +/-22V rails.
>
> Here's a link to the quad's datasheet:
> http://www.national.com/pf/LM/LME49740.html
> --
> john (not affiliated with NatSemi in any way!)