AK1546 参数 Datasheet PDF下载

[AK1546]

AK1546

3GHz Low Noise Integer-N Frequency Synthesizer

1. Overview

The AK1546 is an Integer-N PLL (Phase Locked Loop) frequency synthesizer, covering a wide range of frequency

from 500MHz to 3GHz. Consisting of a highly accurate charge pump, a reference divider, a programmable divider

and a dual-modulus prescaler (P/P+1), this product provides high performance, very low Phase Noise and small

footprints.

An ideal PLL can be achieved by combining the AK1546 with the external loop filter and VCO (Voltage Controlled

Oscillator). Access to the registers is controlled via a 3-wire serial interface. The operating supply voltage is from

2.7V to 3.3V, and the charge pump circuit and the serial interface can be driven by individual supply voltage.

2. Features

Operating frequency :

Programmable charge pump current :

500MHz to 3GHz

647μA to 5176μA typical with 8steps

The current range can be controlled by an external resistor.

Fast lock mode for improved lock time :

The programmable timer can switch two charge pump

current setting.

Supply Voltage :

Separate Charge Pump Power Supply :

Excellent Phase Noise :

On-chip lock detection feature of PLL :

2.7 to 3.3 V (PVDD, AVDD pins)

PVDD to 5.5V (CPVDD pin)

-226dBc/Hz

Selectable Phase Frequency Detector (PFD) Output or

Digital filtered lock detect

Package :

Operating temperature :

20pin QFN (0.5mm pitch, 4mm×4mm×0.75mm)

-40°C to 85°C

MS1388-E-00

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