I have to use the LTC6946-1 (frequency synthesizer with inbuilt PLL, phase detector and programmable VCO) to generate a local oscillator signal for a radio transceiver. The output signal has to be 433.92 MHz. The thing is, I've never used PLLs before. This chip requires a reference frequency that meets the following requirements:
- frequency of 25 MHz
- If a CW signal, input power must be at least 6 dBm into 50 ohms
- If a square wave, then at least 0.5 Vp-p with a slew rate of at least 40V/microsecond.
The problem is, how do I chose an oscillator that provides these requirements? I prefer to use a square wave oscillator here. But I also haven't used oscillators before and when looking at their datasheets, I can't find any information that is helpful. For example, the datasheet here:
This is a component I would like to use, but how can I tell if this component needs external circuitry to drive it? How can I tell what circuitry is needed? And what the output levels are? None of that information is provided and the datasheets for other oscillators are the same.
Can't make heads or tails of this. Any help would be appreciated.