ADI 公司的ADF4150HV是集成了高壓(6V到30V)電荷泵的4.4 GHz分數N或整數N的頻率合成器,RF帶寬到4.4GHz,輸出分頻可以是1/2/3/6/8或16,合成器電源3.0V到3.6V,可編程輸出功率電平,主要用在無線基礎設備,微波點對點/點對多點無線電,VSAT無線電,測試設備,軍用和雷達等.本文介紹ADF4150HV主要特性, 功能方框圖, 超寬帶PLL電路圖和微波PLL電路圖以及ADuC70XX, ADSP-21xx和ADF4150HV連接框圖.

The ADF4150HV is a 4.4 GHz fractional-N or integer-N frequency synthesizer with an integrated high voltage charge pump. The synthesizer can be used to drive external wide band VCOs directly, removing the need for operational amplifiers to achieve higher tuning voltages. This simplifies design and reduces cost while improving phase noise, as active filter topologies tend to degrade phase noise when compared to passive filters.

The VCO frequency can be divided-by 1/2/4/8 or 16 to allow the user to generate RF output frequencies as low as 31.25 MHz. For applications that require isolation the RF output stage can be muted. The mute function is both pin and software controllable.

Control of all the on-chip registers is through a simple 3-wire interface. The charge pump operates off a supply ranging from 6V to 30V, while the rest of the device operates from 3.0 V to 3.6 V. The ADF4150HV can be powered down when not in use.

ADF4150HV主要特性:

Fractional-N synthesizer and integer-N synthesizer

High voltage charge pump: 6 V to 30 V

RF bandwidth to 4.4 GHz

Programmable divide-by-1/2/4/8 or 16 outputs

3.0 V to 3.6 V synthesizer power supply

Programmable dual-modulus prescaler of 4/5 or 8/9

Programmable output power level

Programmable charge pump currents

RF output mute function

3-wire serial interface

Analog and digital lock detect

ADF4150HV應用:

Wireless infrastructure

Microwave Point to Point/Multi-Point Radios

VSAT Radios

Test equipment

Military & Radar applications

Private/Land Mobile Radio

圖1.ADF4150HV功能方框圖

圖2.采用ADF4150HV和VCO的超寬帶PLL電路圖

圖3.采用ADF4150HV的16GHz 微波PLL電路圖

圖4. ADuC70XX和ADF4150HV連接框圖

圖5. ADSP-21xx和ADF4150HV連接框圖

詳情請見:
http://www.analog.com/static/imported-files/data_sheets/ADF4150HV.pdf