Hey guys,
I have a 3.3 volt DC power rail. I have an integrated circuit that can only operate correctly if its power input has less than 30mV ripple.
What is the procedure for building the corresponding filter circuitry to accommodate those requirements?
Is there a reading I can take with the oscilloscope, then build a circuit accordingly, then verify again with the oscilloscope? Is there a way to go about designing this where I don't even need to use an oscilloscope - e.g. do some math and it should guarantee the 30mV max ripple requirements?
What about additional noise that is on the line, will it take care of that as well?
How do you guys go about this, whats the process?
Here are some more specifics if they are needed for this example:
I have a 3.3 volt DC power rail. I have an integrated circuit that can only operate correctly if its power input has less than 30mV ripple.
What is the procedure for building the corresponding filter circuitry to accommodate those requirements?
Is there a reading I can take with the oscilloscope, then build a circuit accordingly, then verify again with the oscilloscope? Is there a way to go about designing this where I don't even need to use an oscilloscope - e.g. do some math and it should guarantee the 30mV max ripple requirements?
What about additional noise that is on the line, will it take care of that as well?
How do you guys go about this, whats the process?
Here are some more specifics if they are needed for this example:
- Integrated circuit has a max current draw spikes of 40mA, pretty much anywhere from 0.1mA to 40mA. Averaging 20mA.
- Lets say the voltage regulator can handle a max output of 250mA.
- 3.3V, 30mV ripple max