- the crystal should target the operating frequency (fRF - 10.7MHz) / 32 or ~10.44688MHz with a 5pF load capacitance (described in the PLL section on p11)
- the tank circuit component values will depend on the parasitic, expecting more parasitic capacitance and not as much inductance, we would suggest component values of around 22nH and 3pF (described in the LNA section, pp9-10).
- the input inductor values is dependent upon the antenna and LNA input circuit. We would recommend about 100nH as the starting point for tuning the impedance.
- the ‘connection’ for the IRSEL pin falls half way between the 315MHz setting (GND) and the floating or VDD5/2 level used for 375MHz. For the best tuning, setting the pin at the VDD5/4 level would be most accurate.