AK1541

The AK1541 is a 20MHz to 600MHz PLL (Phase Locked Loop) frequency synthesizer with a frequency switching function based on delta-sigma modulation Fractional-N.
The AK1541 consists of an 18-bit delta-sigma modulation circuit, a low-noise phase frequency comparator, an institutional charge pump, a reference divider, and a dual modulus prescaler (P / P + 1). By combining the synthesizer with an external loop filter and VCO (Voltage Controlled Oscillator), a complete PLL can be constructed.
Access to the AK1541 registers is controlled by a 3 wire serial interface. The power supply voltage operates from 2.7V to 5.5V, and the power supply system of the charge pump circuit and serial interface can be driven independently.