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about opamp's UGB used in a sigma-delta modulator

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gingerjiang

gingerjiang

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hi all

we know that when a opamp is used in a modulator, the opamp's performances don't need very high, but it include the opamp's unity gain bandwidth?
the opamp has finit slew rate, non-single pole settling, then the UGB should be high enough to settling to within a LSB of resolution, or may be not high?
 

it doesn't need to setting accurately for sigma delta modulator. you just need linear setting
 

pfd001 said:
it doesn't need to setting accurately for sigma delta modulator. you just need linear setting
Click to expand...
hi pfd001
linear settling? that's no slew rate?
if is two-pole settling behavior, it's ok?
 

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