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onclick="readmode($('thread_subject').innerHTML, 953103);" 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_953103"> MCD2006G/S是一组用于VHF频段的无线语音/数据发射芯片，包括MCD2006G和MCD2006S两颗芯片。两颗芯片都有一个压控振荡器（VCO）、一个射频功率放大器、一个<a href="http://material.oecr.com" target="_blank" class="relatedlink">晶体</a>振荡器和一个频率综合器（Frequency Synthesizer）；加上片外LPF、电感和变容管组成了一个完整的锁相环（PLL）。不同点是，MCD2006S有一个6位ROM模块，用户只能根据固定的逻辑表设定六个脚位的逻辑电平，使芯片锁定在对应的频点（43个频点如附录第14页所示）。与MCD2006S不同的是，MCD2006G包括一个MCU控制串行接口<a href="http://electronic.oecr.com" target="_blank" class="relatedlink">电路</a>，用户可以根据频率要求使用外接MCU随意设置分频数，从而锁定在任意一个频率。PLL的频率范围3MHz-110MHz，射频放大器在50欧负载条件下输出典型功率3dBm@27MHz。MCD2006G适合于单片机控制的电路，MCD2006S则可以免用单片机。实际应用证实MCD2006G/S能够在2.7V至4.5V电压范围、-40度至+85度温度范围内稳定工作。<br /> 应用范围<br /> ● FM收发器、遥控器<br /> ● 27M婴儿监听器<br /> ● 40-49M婴儿监听器<br /> ● 27M对讲机、车载电台<br /> ● 红外线语音传输系统<br /> 特点<br /> 1)频率范围： MCD2006G：3MHz ～ 110MHz<br /> MCD2006S：在ROM逻辑表中详细列出的43个频点<br /> 2)工作电压范围：2.7 ～ 4.5V（3.3V 典型）<br /> 3)工作电流：<a href="mailto:19mA@3.3V">19mA@3.3V</a>, 27MHz<br /> 4)参考晶体：<br /> MCD2006G：4MHz ～ 25MHz<br /> MCD2006S：4MHz（产生5KHz参考频率），20MHz（产生25KHz参考频率）<br /> 5)输出功率（50Ω负载）：3dBm@27MHz<br /> 6)低相位噪声：10KHz频偏处-112dBc/Hz，50Hz环路带宽<br /> 7)发射调制模式：语音/数据<br /> 8)射频信号失真度：< 1%<br /> 9)发射调制频偏：可达到5KHz<br /> 10)调制频响：50Hz ～ 30KHz<br /> 11)调制速率：300bps ～ 120Kbps<br /> 12)封装： <br /> MCD2006G：TSSOP-16<br /> MCD2006S：SSOP-20L<br /> <br /> <ignore_js_op> <img id="aimg_68378" aid="68378" src="static/image/common/none.gif" zoomfile="data/attachment/forum/201111/25/093054vgkud3lbknga1bll.jpg" file="data/attachment/forum/201111/25/093054vgkud3lbknga1bll.jpg" class="zoom" onclick="zoom(this, this.src, 0, 0, 0)" width="98" id="aimg_68378" inpost="1" onmouseover="showMenu({'ctrlid':this.id,'pos':'12'})" /> <div class="tip tip_4 aimg_tip" id="aimg_68378_menu" style="position: absolute; display: none" 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