chaojixin
Member level 1
I find the concerned frequency of output noise of bandgap is usually 0.1~10Hz and that of LDO is usually 100~100kHz.
(1)I think it should be different according to application, but I find that in most datasheets it is specified as above, why?
(2)how to test the output noise?connect the output pin directly to the spectrum analyzer and integrate it? But I find the spectrum analyzer in our lab has very low precision in such low frequency, is there other method to measure the noise?
(1)I think it should be different according to application, but I find that in most datasheets it is specified as above, why?
(2)how to test the output noise?connect the output pin directly to the spectrum analyzer and integrate it? But I find the spectrum analyzer in our lab has very low precision in such low frequency, is there other method to measure the noise?
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