Hi,
I would like to ask you some questions regarding the product ADC12D1800RF, which I am trying to model
in Simulink:
1)a) In the data manual, the noise floor density is given by -154.0 dBFS/Hz. I would like to know under which setting this has been obtained (input signal frequency and power level, considered bandwidth 1.8GHz or 3.6GHz?)
1)b) Is there any relationship between SNR and the noise floor level, in the sense SNR=154.0 dBFS/Hz + 10*log10(3.6e9) + input signal power in dBFS
2) The IMD3 seems to be very sensitive to the input frequency, for instance from Fin=2670MHz to Fin=2070MHz, the IMD3 changes by 10dB, is there an explanation for that?
3) Does the internal pre-amplifier insert any kind of nonlinearity to the signal?
4) The data manual provide onlythe INL and DNL curves for the Non-DES-I mode. Are they also similar for the DES mode?
Thanks!