The difference between VCXO crystal oscillator and TCXO crystal oscillator

· Compensation method for frequency stability

VCXO (voltage-controlled crystal oscillator)
VCXO is called voltage-controlled crystal oscillator (voltage-controlled oscillator), and the change of crystal output is controlled by DC voltage. In many applications, we can control the bias of VCXO through the DAC function of the microcontroller to adjust the output frequency of VCXO. Therefore, the frequency deviation of VCXO can be compensated by the voltage control pin. It is mainly used in scenarios with high requirements for short-term stability but not strict requirements for temperature stability

TCXO (temperature compensated crystal oscillator)
TCXO is called temperature compensated crystal oscillator (Temperature Compensate X’tal (crystal) Oscillator), which is designed to work under large changes in ambient temperature. TCXO is equipped with a thermistor, which is responsible for sensing the continuous change of ambient temperature and compensating the crystal oscillator. It is mainly used in situations where frequent frequency adjustment is not required but stability is required over a wide temperature range, such as barcode scanners, navigation and positioning boards, etc.

· Comparison of conventional key parameters