I'm planning to use the AD9545 is to obtain a stable output frequency for clocking an LTE and 5G station. The expected stability at the output have to be 1 ppb or better.
Description of the circuit.
REF A input - 1pps GPS time stamps is supplied. The SYS IN is supplied with a 52 MHz crystal reference signal. The refB input is driven by a signal from the spare TCXO reference oscillator when the GPS signal is lost. The system signal clock is compensated by 1 pps GPS also.
1) Is an output 1 ppb frequency stability really achievable with a 1 pps GPS reference at REFx inputs?
2) How fast a needed accuracy would be achieved when the DPLL Fast Acquisition (FACQ) is activated?
3) Could the AD9542 chip be applied for these purposes?