Hello,
I could write registers of AFE4490 and i can read them back correctly, but when i read registers (2a, 2b, 2c, 2d, 2e and 2f), the result is a big number and even when i open or short INN and INP pins, numbers don't change.
stage2 is disabled.
all forms of Rf and Cf were tried.
pins 4, 7, 9 and 30 show correct values according the datasheet .
schematic is attached .
any ideas please?
thanks!