Which crystal oscillators freuqnecy are used in drones?

what is Crystal oscillator frequency application in UVA ?

The significant advantage of the drone is the freedom to achieve filming in space. It is characterized by small size, remote control and flexible action. UAVs equipped with intelligent systems can also achieve automatic target AI identification, intelligent hovering, intelligent tracking and following, intelligent obstacle sensing and avoidance, intelligent return to flight, and instant transmission of video data to customer terminals via wireless networks. 

Therefore, drones with such convenient aerial photography functions are widely used in monitoring, news media, mapping, disaster relief and rescue, transportation and other fields.

Given the strict requirements of UAV design in terms of power consumption, all airframe components, including the built-in PCBA, battery, etc., need to take the size and weight into precise consideration. 

As the crystal oscillator that provides the frequency signal to the chip, it is obvious that the synchronous miniaturization must also be achieved. Therefore, UAV crystal oscillator need to have the following properties:

Ø Small size

Ø Low power consumption

Ø High precision

Ø High stability

Ø Anti-interference

Ø Resistant to high and low temperatures

The specific parameters of SMD crystal oscillator commonly used in UAVs are as follows:

Ø Crystal oscillator frequency: 8 MHz, 12 MHz, 16 MHz

Ø crystaloscillator Frequency difference range: ±10 PPM

Ø Load capacitance: 8PF, 9PF, 12PF

Ø Temperature range: -40~+85 degrees

Common dimensions:

Ø 3.2×2.5mm

Ø 2.5×2.0mm

Ø 2.0×1.6mm

For high-end intelligent drones, the crystal oscillator is generally VCXO, Crystal oscillator frequency accuracy is ±0.5ppm. In addition to its high accuracy, it also performs better than ordinary passive crystals in terms of stability.