Quote:What is the normal current value in the bandgap core and Iref?
Inside BGR core -- < 50uA
Inside Current References core -- < 100uA
Quote:Normally the core current is very small <50uA. I read from papers, is it true? will it suspectible to interference?
Current being small is true. Layout of these blocks is done with extreme care which takes care of averting susceptibility to substrate noise, etc.
Quote:How about Iref value as a global current distribution.
As raja quoted somewhere, dont keep current multiplication ratios bigger than 100x. It increases the noise in the current.
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mayank.