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AFE4490_problem with PD reading

Other Parts Discussed in Thread: AFE4490

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!