《電子技術應用》
您所在的位置:首頁 > 模擬設計 > 解決方案 > Maxim MAX19994A雙路RF下變換方案

Maxim MAX19994A雙路RF下變換方案

2012-01-07
作者:Maxim公司

Maxim公司的 MAX19994A是雙路RF下變換器,RF范圍從1200MHz到2000MHz,LO范圍從1450MHz 到 2050MHz,IF范圍從50MHz到500MHz,典型的轉換增益為8.4dB,典型的噪音為9.8dB,輸入IP3典型值為+25dBm,輸入1dB壓縮點為+14dBm,單電源5.0V 或3.3V工作,主要用在WCDMA/LTE,TD-SCDMA,GSM/EDGE和cdma2000M 無線基站,無線本地回路(WLL),固定寬帶無線接入,私人移動電臺和軍用系統.本文介紹MAX19994A主要特性,功能方框圖,以及典型應用電路圖和所用元件表.

The MAX19994A dual-channel downconverter is designed to provide 8.4dB of conversion gain, +25dBm input IP3, +14dBm 1dB input compression point, and a noise figure of 9.8dB for 1200MHz to 2000MHz diversity receiver applications. With an optimized LO frequency range of 1450MHz to 2050MHz, this mixer supports both high- and low-side LO injection architectures for the 1200MHz to 1700MHz and 1700MHz to 2000MHz RF bands, respectively.

In addition to offering excellent linearity and noise performance, the device also yields a high level of component integration. This device includes two double-balanced passive mixer cores, two LO buffers, a dual-input LO selectable switch, and a pair of differential IF output amplifiers. Integrated on-chip baluns allow for singleended RF and LO inputs. The MAX19994A requires a nominal LO drive of 0dBm and a typical supply current of 330mA at VCC = 5.0V, or 264mA at VCC = 3.3V.

The MAX19994A is pin compatible with the MAX9985/ MAX9995/MAX19985A/MAX19993/MAX19995/ MAX19995A series of 700MHz to 2500MHz mixers and pin similar with the MAX19997A/MAX19999 series of 1850MHz to 4000MHz mixers, making this entire family of downconverters ideal for applications where a common PCB layout is used across multiple frequency bands.

The device is available in a 6mm x 6mm, 36-pin thin QFN package with an exposed pad. Electrical performance is guaranteed over the extended temperature range, from TC = -40NC to +85NC.

MAX19994A主要特性:

1200MHz to 2000MHz RF Frequency Range

1450MHz to 2050MHz LO Frequency Range

50MHz to 500MHz IF Frequency Range

8.4dB Typical Conversion Gain

9.8dB Typical Noise Figure

+25dBm Typical Input IP3

+14dBm Typical Input 1dB Compression Point

68dBc Typical 2LO - 2RF Spurious Rejection at PRF = -10dBm

Dual Channels Ideal for Diversity Receiver application

47dB Typical Channel-to-Channel Isolation

Low -6dBm to +3dBm LO Drive

Integrated LO Buffer

Internal RF and LO Baluns for Single-Ended Inputs

Built-In SPDT LO Switch with 48dB LO-to-LO Isolation and 50ns Switching Time

Pin Compatible with the MAX9985/MAX9995/MAX19985A/MAX19993/MAX19995/MAX19995A Series of 700MHz to 2200MHz Mixers

Pin Similar to the MAX19997A/MAX19999 Series of 1850MHz to 4000MHz Mixers
Single 5.0V or 3.3V Supply

External Current-Setting Resistors Provide Option for Operating Device in Reduced-Power/Reduced-Performance Mode

MAX19994A應用:

WCDMA/LTE Base Stations

TD-SCDMA Base Stations

GSM/EDGE Base Stations

cdma2000M Base Stations

Wireless Local Loop

Fixed Broadband Wireless Access

Private Mobile Radios

Military Systems


圖1.MAX19994A功能方框圖

圖2.MAX19994A典型應用電路圖

所用元件值:



詳情請見:
http://datasheets.maxim-ic.com/en/ds/MAX19994A.pdf

本站內容除特別聲明的原創文章之外,轉載內容只為傳遞更多信息,并不代表本網站贊同其觀點。轉載的所有的文章、圖片、音/視頻文件等資料的版權歸版權所有權人所有。本站采用的非本站原創文章及圖片等內容無法一一聯系確認版權者。如涉及作品內容、版權和其它問題,請及時通過電子郵件或電話通知我們,以便迅速采取適當措施,避免給雙方造成不必要的經濟損失。聯系電話:010-82306118;郵箱:aet@chinaaet.com。
主站蜘蛛池模板: 久久精品高清视频 | 在线看片不卡 | 色婷婷91 | 久久精品中文字幕不卡一二区 | 草草影院第一页yycccom | 91亚洲精品久久91 | 第一色网站 | 亚洲欧美激情视频 | 中文字幕精品一区二区绿巨人 | 真人一级毛片 | 日韩18在线观看地址 | 99爱视频免费高清在线观看 | 最新亚洲精品国自产在线观看 | 黑人一级大毛片 | 国产欧美一区二区精品久久久 | 免费观看成人毛片 | 欧美操操操 | 久青草国产在线 | 欧美激情一区二区亚洲专区 | 亚洲成aⅴ人片在线影院八 亚洲成av人片在线观看 | 久草视频网址 | 成人久久伊人精品伊人 | 国产首页精品 | 宅女福利视频在线看免费网站 | 成年人免费在线视频观看 | 国产在线91区精品 | 台湾三级香港三级在线理论 | 久久亚洲精品中文字幕亚瑟 | 久久国产精品久久久 | 亚洲 欧美 精品专区 极品 | 91精品国产91久久久久久 | 国产成人精品一区二三区在线观看 | 91久久夜色精品国产网站 | 欧美精品在线一区二区三区 | 日韩a无吗一区二区三区 | 日本欧美韩国一区二区三区 | 精品一区二区三区视频在线观看 | 另类欧美日韩 | 玖玖精品在线视频 | 高清在线精品一区二区 | 久久九九精品一区二区 |