AK1541

20 to 600MHz Delta-Sigma Fractional-N Frequency Synthesizer

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Description

20MHz - 600MHz Delta-Sigma Fractional-N Frequency Synthesizer

Key Features

. Delta-Sigma Fractional-N provides fast lockup time, lower phase noise and lower spurious performance

. Operating Frequency: 20MHz to 600MHz

. On-chip Charge Pump for Fast Lockup

. Charge Pump Current: (Normal Operating Scheme) 10.6mA to 168.9A typ., 16steps

(Fast Lockup Scheme) 0.84mA to 2.32mA typ., 8steps.

. Supply Voltage: 2.7V to 5.5V (PVDD pin)

. Charge Pump Power Supply: Separately controlled、PVDD to 5.5V (CPVDD pin)

. On-chip Power-saving Function

. Current Consumption: 4.6mA typ.

. On-chip PLL Lock Detection: Selectable Phase Frequency Detector (PFD) Output or Digital filtered

Lock Detect

. Package: 24pin QFN(0.5mm pitch, 4mm 4mm 0.75mm)

. Operating Temperature: -40 °Cto 85 °C

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Block Diagram

Block Diagram

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