ADI公司的ADRF6807是工作在2.8-4.2GHz的集成了PLL和VCO的大動(dòng)態(tài)范圍IQ解調(diào)器,LO頻率范圍700MHz到1050MHz,IP3可達(dá)26.7dBm,噪音(DSB)為13.1dB,電壓轉(zhuǎn)換增益1.0dB/4.3dB.相位正交解調(diào)精度優(yōu)于0.5度,幅度正交解調(diào)精度優(yōu)于0.1dB,基帶解調(diào)170MHz/135MHz,3dB帶寬,PLL編程采用SPI串口,主要用在QAM/QPSK RF/IF解調(diào)器,蜂窩CDMA" title="W-CDMA">W-CDMA/CDMA/CDMA2000,微波點(diǎn)對(duì)點(diǎn)(多點(diǎn))無(wú)線電,寬帶無(wú)線和WiMAX.本文介紹了ADRF6807主要特性,方框圖, 基本的連接電路, 評(píng)估板電路圖和材料清單(BOM), 評(píng)估板元件布局圖以及評(píng)估板通用特性,噪音特性別和相位噪音特性測(cè)試圖.

The ADRF6807 is a high dynamic range IQ demodulator with integrated phase-locked loop (PLL) and voltage controlled oscillator (VCO). The fractional-N PLL/synthesizer generates a frequency in the range of 2.8 GHz to 4.2 GHz. A programmable quadrature divider (divide ratio = 4) divides the output frequency of the VCO down to the required local oscillator (LO) frequency to drive the mixers in quadrature. Additionally, an output divider (divide ratio = 4 to 8) generates a divided-down VCO signal for external use. The PLL reference input is supported from 9 MHz to 160 MHz. The phase detector output controls a charge pump whose output is integrated in an off-chip loop filter. The loop filter output is then applied to an integrated VCO. The IQ demodulator mixes the differential RF input with the complex LO derived from the quadrature divider. The differential I and Q output paths have excellent quadrature accuracy and can handle baseband signaling or complex IF up to 120 MHz. A reduced power mode of operation is also provided by programming the serial interface registers to reduce current consumption, with slightly degraded input linearity and output current drive. The ADRF6807 is fabricated using an advanced silicon-germanium BiCMOS process. It is available in a 40-lead, exposed paddle, RoHS-compliant, 6 mm × 6 mm LFCSP package. Performance is specified over the −40℃ to +85℃ temperature range.

ADRF6807主要特性:

IQ demodulator with integrated fractional-N PLL

LO frequency range: 700 MHz to 1050 MHz

For the following specifications (LPEN = 0)/(LPEN = 1):

Input P1dB: 12.8 dBm/11.7 dBm Input

IP3: 26.7 dBm/24.0 dBm

Noise figure (DSB): 13.1 dB/12.4 dB

Voltage conversion gain: 1.0 dB/4.3 dB

Quadrature demodulation accuracy

Phase accuracy: <0.5°

Amplitude accuracy: <0.1 dB

Baseband demodulation: 170 MHz/135 MHz, 3 dB bandwidth

SPI serial interface for PLL programming

40-lead, 6 mm × 6 mm LFCSP

ADRF6807應(yīng)用:

QAM/QPSK RF/IF demodulators

Cellular W-CDMA/CDMA/CDMA2000

Microwave point-to-(multi)point radios

Broadband wireless and WiMAX

圖1.ADRF6807方框圖

圖2.ADRF6807基本的連接圖

圖3.ADRF6807評(píng)估板電路圖
ADRF6807評(píng)估板材料清單(BOM):



圖4.ADRF6807評(píng)估板元件布局圖(頂層)

圖5.ADRF6807評(píng)估板元件布局圖(底層)

圖6.ADRF6807評(píng)估板通用特性測(cè)試圖

圖7.ADRF6807評(píng)估板噪音特性測(cè)試圖

圖8.ADRF6807評(píng)估板相位噪音特性測(cè)試圖
詳情請(qǐng)見(jiàn):
http://www.analog.com/static/imported-files/data_sheets/ADRF6807.pdf