MK3720DLF

The MK3720DLF is an integrated voltage-controlled crystal oscillator (VCXO) designed and manufactured by Maxim Integrated Products. It is suitable for highly accurate and stable frequency generation applications. This article will focus on the application field and working principle of the MK3720DLF.

Application Field

The MK3720DLF is a versatile VCXO that can be used as a precision frequency reference for applications such as radio communication, frequency synthesis, and telecommunications equipment. It can also be used in jitter attenuation, transceiver, and clock generator applications.

The MK3720DLF features an output frequency range of 1.5MHz to 120MHz, low power consumption of 0.14mA, and high levels of output jitter attenuation, making it a highly reliable VCXO for a variety of applications. The MK3720DLF is also highly accurate, and its long-term frequency accuracy is typically within +/- 10 ppm over the operating temperature range of -30C to +85C.

The MK3720DLF is available in a variety of packages, including a 24-lead narrow body SSOP, a 16-lead/20-lead FDIP, a 16-lead TSSOP, and a 24-lead thin-shrink package. The packages vary in size, and their small footprints allow the MK3720DLF to be integrated into a range of printed circuit boards.

Working Principle

The MK3720DLF utilizes a voltage-controlled oscillator (VCO) that uses a variable capacitance varicap diode to adjust the frequency. A voltage source is then used to adjust the frequency of the oscillator. The output frequency of the VCO is determined by the external capacitor and varactor diode fed with the control voltage. The nominal frequency is determined by the external inductor and capacitor.

The MK3720DLF can also be adjusted with an external control voltage. This allows for dynamic frequency scaling depending on the application. The external voltage can range from 0 V to +7V, and it is typically supplied through the use of a digital-to-analog converter (DAC) with a 0 to 5V range. This allows for an incredibly precise frequency control with an accuracy of +1ppm.

The MK3720DLF also features low jitter performance. This is achieved by utilizing a phase lock loop circuit that directly controls the VCO output. This allows for the output to remain stable, even if the supply voltage and temperature vary.

In summary, the MK3720DLF is a versatile and highly accurate voltage-controlled crystal oscillator that is suitable for a variety of frequency reference and precision clock generator applications. Its low jitter performance, wide operating range, and small footprint make it an ideal choice for high-end frequency applications.