The CC2510 datasheet says that:
The chip can alternatively be operated with a reference signal from 24 to 27 MHz (CC2510Fx) or 48 MHz (CC2511Fx) instead of a crystal. This input clock can either be a full-swing digital signal (0 V to VDD) or a sine wave of maximum 1 V peak-peak amplitude. The reference signal must be connected to the XOSC_Q1 input. The sine wave must be connected to XOSC_Q1 using a serial capacitor.
Considering the sine wave input, assuming that the slightly strange requirement of "maximum 1 V peak-peak amplitude" is correct, then what is the minimum peak-peak amplitude needed for a valid sine wave input?
(My suspicion is that someone wrote "maximum" where they meant "minimum", but if not then it is necessary to also know the lowest p-p sine wave that will suffice)