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Is 31 dB a good value for an OPAMP's PSRR?

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sykab

sykab

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Is 31 dB a good value for an OPAMP's PSRR?
 

Re: PSRR

It doesn't sound too impressive.

You can calculate it yourself. 31dB is a gain of 35. How much error can you accept in your output signal?

e.g. If your max error is 1mV, that means that your supply ripple should be lower than 35mV. Is that possible?

Again, it sounds a little bit scarce
 

    sykab

    sykab

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PSRR

It is a very poor PSRR...
 

    sykab

    sykab

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Re: PSRR

It depents on the application where you use this Opamp, and the frenquency where you get this 31dB value.

For a positive supply, working as to audio/video's supplier, it's not too bad. And if PSRR=31dB under f=10MHz, it's a little impressive!
 

    sykab

    sykab

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PSRR

31dB at what frequency? At low frequencies 50-60db is more or less the norm for cascoded opamps. Howevere depedning on the opamp can fall very quickly at high frequnecies.
 

    sykab

    sykab

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