In the AD9364 Register Map Reference Manual UG-672 page 56 of 72 :
Rtia seems to control the TIA stage gain, 2 values are avalaible 3.5k
and 1.75k for 0 dB and -6 dB gain respectively.
I suppose that TIA C LSB and TIA C MSB bits allow the internal capacitor adjusment for the 3 dB cutoff frequency of the TIA first order Butterworth low pas filter, is that correct ?
If true, what is the relationship beetween the bit sequence and this 3 dB cutoff frequency ?