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onclick="readmode($('thread_subject').innerHTML, 953101);" class="show">阅读模式</a> </div> </div> </div><div class="pct"><style type="text/css">.pcb{margin-right:0}</style><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_953101"> MCD2005TX/RX是一对具备MCU选频功能的多信道数据/语音接收发射芯片组，包括一颗发射芯片(TX)和一颗接收芯片(RX)，频率覆盖100MHz-500MHz。RX芯片由一个压控振荡器（VCO）、一个频率综合器（Frequency Synthesizer）、一个<a href="http://material.oecr.com" target="_blank" class="relatedlink">晶体</a>振荡器、一个MCU控制串行接口等<a href="http://electronic.oecr.com" target="_blank" class="relatedlink">电路</a>组成，在接收器中作本振源，提供幅度为–5dBm的射频功率。TX芯片除了拥有以上RX芯片包括的功能模块外，还有一个RF功率放大器，能够为50欧姆的负载提供典型值为6dBm的射频功率。片上集成VCO和分频器加上片外电感、变容管、和LPF构成一个完整的锁相环 （PLL），用户只需根据频率要求使用外接MCU设置内部分频器就可以实现锁相功能。<a href="http://b.oecr.com/sell" target="_blank" class="relatedlink">产品</a>应用证明MCD2005TX/RX在2.7V至4.5V电压范围、-40度至+85度温度范围之间工作稳定。<br /> 应用范围<br /> ● 数据传输测控<br /> ● 移动通讯直放站<br /> 特点<br /> 1)频率范围：100MHz ～ 500MHz<br /> 2)工作电压范围：2.7 ～ 4.5V（3.3V 典型）<br /> 3)晶体频率：4 ～ 25MHz<br /> 4)锁定检测功能：高电平为锁定状态<br /> 5)工作电流：<br /> MCD2005TX：典型值<a href="mailto:17mA@3.3V">17mA@3.3V</a>, 223MHz<br /> MCD2005RX：典型值<a href="mailto:13mA@3.3V">13mA@3.3V</a>, 201.6MHz<br /> 6)输出功率（50Ω负载）：<br /> MCD2005TX：6dBm@223MHz<br /> MCD2005RX：<a href="mailto:-5dBm@201.6MHz">-5dBm@201.6MHz</a><br /> 7)射频信号失真度：< 1%<br /> 8)相位噪声：50Hz环路带宽，10KHz频偏处相位噪声为-102dBc/Hz<br /> 9)发射调制模式：数据/语音<br /> 10)发射调制频偏：可达到5KHz<br /> 11)调制速率：300bps ～ 9.6Kbps（5KHz调制频偏）<br /> 12)调制频响：50Hz - 20KHz<br /> 13)封装形式：SSOP-20L<br /> <br /> <ignore_js_op> <img id="aimg_68377" aid="68377" src="static/image/common/none.gif" zoomfile="data/attachment/forum/201111/25/092900lrlrunliizbip8ti.jpg" file="data/attachment/forum/201111/25/092900lrlrunliizbip8ti.jpg" class="zoom" onclick="zoom(this, this.src, 0, 0, 0)" width="98" id="aimg_68377" inpost="1" onmouseover="showMenu({'ctrlid':this.id,'pos':'12'})" /> <div class="tip tip_4 aimg_tip" id="aimg_68377_menu" style="position: absolute; display: none" disautofocus="true"> <div class="xs0"> <p><strong>005TX.jpg</strong> <em class="xg1">(213.09 KB, 下载次数: 3)</em></p> <p> <a href="http://bbs.oecr.com/forum.php?mod=attachment&aid=NjgzNzd8ZGFlZmYyOTZ8MTczNDkxMDMzMHwwfDI0Nzg3OA%3D%3D&nothumb=yes" target="_blank">下载附件</a> <a href="javascript:;" onclick="showWindow(this.id, this.getAttribute('url'), 'get', 0);" id="savephoto_68377" url="home.php?mod=spacecp&ac=album&op=saveforumphoto&aid=68377&handlekey=savephoto_68377">保存到相册</a> </p> <p class="xg1 y">2011-11-25 09:28 上传</p> </div> <div class="tip_horn"></div> </div> </ignore_js_op> <br /> 网站：http://www.mcdevices.com</td></tr></table> <div class="ptg mbm mtn"> <a title="芯片组" href="misc.php?mod=tag&id=2612" target="_blank">芯片组</a>, <a title="锁相环" href="misc.php?mod=tag&id=2613" target="_blank">锁相环</a>, <a title="语音" href="misc.php?mod=tag&id=2614" target="_blank">语音</a></div> </div> <div id="comment_953101" class="cm"> </div> <div id="post_rate_div_953101"></div> </div> </div> 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