For the same bandwidth, the noise of two op amps in series will always be larger than using a single amp, even if the two noises are uncorrelated (they add as their RSS sum).It really depends on the application. Because amplifier noise is uncorrelated even when two amps are on the same chip, there can be a noise advantage to having two amps in series, each with half the required circuit gain, compared to a single amplifier providing all of the gain. .........................
In general, there isn't any harm -- that's why they put multiple amps in the same package.Just curious. I came across this trying to answer a post. If you had a dual op-amp, what what would be the harm in trying to use both instead of dealing with unused pins?
by Jake Hertz
by Jake Hertz
by Duane Benson
by Aaron Carman