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From: Jamie on 4 Nov 2009 19:54
Phil Allison wrote:

> "Mike Warren"
>
>>The LM358 datasheet doesn't specify EIN or S/N. I assume that's
>>because it's not very good, but using one would simplify my
>>circuit greatly as I only have +5V available without a lot
>>of extra work. I need to buffer an audio signal and add a gain
>>of 2. The input is about 1VRMS.
>>
>>THD is not super important, but I wouldn't like to add a lot
>>of noise.
>>
>>Has anyone used a LM358 in a similar situation successfully?
>
>
>
> ** For non critical applications, within the audio band and with a gain of
> only 2 - there is no problem.
>
> However - 2 times 1 volt rms is MORE than 5 volts peak to peak !!
>
> Beware: If the output of the LM358 is cap coupled to the next stage, then
> a load resistor to ground is essential to eliminate severe x-over
> distortion.
>
> See the Nat Semi 1994 data sheet - page 6.
>
>
>
>
> ..... Phil
>
>
Page 8 in the Oct 2005 edition.



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