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?
-- - Mike
"Mike Warren"
** 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
Thanks, Phil. That's enough for me to build a test circuit.
-- - Mike
TDA7052/a works....
It looks like it will do what you need.
Have you thought about using a LMV358 ? THat operates at 2.7..5.5 volts.
THe LPV358 is also lower in current but does introduce more noise. Which seems to be a big jump compared to the first 2.
Page 8 in the Oct 2005 edition.
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