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href="/info/industry/special/analog">模擬技術(shù)</a> > <a href="/info/articlelist/special/analog/type/5">設(shè)計(jì)應(yīng)用</a> > MAX2057具有模擬增益控制的可變?cè)鲆娣糯笃?/p> </div> </div> </div>   <script src="https://forum.eepw.com.cn/jscontent/wenzilian" type="text/javascript"></script>  <div class="txzzxvv" id="container"> <section> <article> <h1>MAX2057具有模擬增益控制的可變?cè)鲆娣糯笃?/h1> <div id="l1lb71x" class="authorTimeSource"> <span>作者：</span> <span>時(shí)間：2012-03-14</span> <span>來(lái)源：網(wǎng)絡(luò)</span> <link rel="stylesheet" type="text/css"/> <span style="float:right; width:130px;margin-right:0px; text-align:right;"> <div id="b111zp1" class="nav0"> <ul> <li><a href="javascript:void(0);"><img src="http://www.ex-cimer.com/event/action/images/icon_add_4.png" width="20" border="0" align="absmiddle" />加入技術(shù)交流群</a> <ul> <li style="text-align:center;"><img src="http://www.ex-cimer.com/event/company/images/code_1.jpg" width="130"><br />掃碼加入<br />和技術(shù)大咖面對(duì)面交流<br />海量資料庫(kù)查詢</li> </ul> </li> </ul> </div> </span> <span style="float:right; width:30px;margin-right:0px; text-align:right;"><a rel="nofollow">收藏</a></span> </div> <div id="fbrbbl9" class="hAd4_Afinal20a_back">  <iframe id='a890e388' name='a890e388' src='https://ad.eepw.com.cn/www/delivery/afr.php?zoneid=88&cb=INSERT_RANDOM_NUMBER_HERE' frameborder='0' scrolling='no' width='660' height='60'><a target='_blank'><img src='https://ad.eepw.com.cn/www/delivery/avw.php?zoneid=88&cb=INSERT_RANDOM_NUMBER_HERE&n=a635e61e' border='0' alt='' /></a></iframe> </div> <div style="margin-top:28px;"></div> <div id="b9zzxvf" class="content" id="contentDiv" style="position:relative;"> <div id="l7rhbjt" class="ad_300x180_Afinal13_back">  <iframe id='a225770a' name='a225770a' src='https://ad.eepw.com.cn/www/delivery/afr.php?zoneid=87&cb=INSERT_RANDOM_NUMBER_HERE' frameborder='0' scrolling='no' width='300' height='200'><a target='_blank'><img src='https://ad.eepw.com.cn/www/delivery/avw.php?zoneid=87&cb=INSERT_RANDOM_NUMBER_HERE&n=a576c0a2' border='0' alt='' /></a></iframe> </div> <span id="contentlabels" style="font-size:14px;"><a class="contentlabel" href="http://www.ex-cimer.com/news/listbylabel/label/MAX2057"><em>MAX2057</em></a>是通用、高性能<a class="contentlabel" href="http://www.ex-cimer.com/news/listbylabel/label/可變?cè)鲆?><em>可變?cè)鲆?/em></a><a class="contentlabel" href="http://www.ex-cimer.com/news/listbylabel/label/放大器"><em>放大器</em></a>(VGA)，設(shè)計(jì)工作在1700MHz至2500MHz頻率范圍?。該器件增益為15.5dB，噪聲系數(shù)為6dB，輸出1dB壓縮點(diǎn)為23.8dBm。<a class="contentlabel" href="http://www.ex-cimer.com/news/listbylabel/label/MAX2057"><em>MAX2057</em></a>在整個(gè)衰減范圍內(nèi)還可維持高達(dá)37dBm的OIP3。另外，片上模擬衰減器在可選的21dB或42dB<a class="contentlabel" href="http://www.ex-cimer.com/news/listbylabel/label/控制"><em>控制</em></a>范圍內(nèi)能夠獲得無(wú)限制的<a class="contentlabel" href="http://www.ex-cimer.com/news/listbylabel/label/控制"><em>控制</em></a>和高衰減精度。這些特性使<a class="contentlabel" href="http://www.ex-cimer.com/news/listbylabel/label/MAX2057"><em>MAX2057</em></a>為DCS/PCS、cdma2000?、W-CDMA和PHS/PAS發(fā)送器和功率<a class="contentlabel" href="http://www.ex-cimer.com/news/listbylabel/label/放大器"><em>放大器</em></a>AGC電路提供了一個(gè)理想的VGA。<P>　　MAX2057與MAX2056 800MHz至1000MHz VGA引腳兼容，使該系列<a class="contentlabel" href="http://www.ex-cimer.com/news/listbylabel/label/放大器"><em>放大器</em></a>非常適合采用相同PCB布局的雙頻應(yīng)用中。</P><P>　　MAX2057工作在+5V單電源，采用緊湊的、帶裸露焊盤的36引腳、薄型QFN封裝(6mm x 6mm x 0.8mm)。確保工作在-40°C至+85°C擴(kuò)展級(jí)溫度范圍。</P><P>　　關(guān)鍵特性</P><P>　　1700MHz至2500MHz RF頻率范圍?</P><P>　　37dBm固定OIP3 (在所有增益設(shè)置下)</P><P>　　輸出1dB壓縮點(diǎn)為23.8dBm</P><P>　　最大增益設(shè)置時(shí)具有15.5dB增益(典型值)</P><P>　　在100MHz帶寬內(nèi)增益平坦度為0.5dB</P><P>　　最大增益設(shè)置(使用1個(gè)衰減器)時(shí)噪聲系數(shù)為6dB</P><P>　　兩種增益<a class="contentlabel" href="http://www.ex-cimer.com/news/listbylabel/label/控制"><em>控制</em></a>范圍：21dB和42dB</P><P>　　<a class="contentlabel" href="http://www.ex-cimer.com/news/listbylabel/label/模擬增益"><em>模擬增益</em></a>控制</P><P>　　+5V單電源供電</P><P>　　引腳兼容于MAX2056 800MHz至1000MHz RF VGA</P><P>　　外部電流設(shè)置電阻提供VGA工作模式選擇，具有降低功耗/降低性能模式選項(xiàng)</P><P>　　提供無(wú)鉛封裝</P><P></P><DIV><img onload="if(this.width>620)this.width=620;" onclick="window.open(this.src)" style="cursor:pointer" style="WIDTH: 610px; CURSOR: pointer; HEIGHT: 730px" onclick="window.open('/uploads/allimg/110119/1_110119095616_1.jpg')" height=737 alt="MAX2057具有模擬增益控制的可變?cè)鲆娣糯笃? src="http://editerupload.eepw.com.cn/fetch/20131227/208238_1_0.jpg" width=800 border=0><BR></DIV><P></P> </span>  <div class="9tvjlvh" id="coverDiv" class="article_reg" style="width:100%;overflow:hidden;display:none;z-index:10;position:absolute;left:0;background:#fff;"> <center> <img src="https://webstorage.eepw.com.cn/images/display/reg.jpg" border="0" usemap="#Map" /> <map name="Map" id="Map"> <area shape="rect" coords="133,235,319,253" target="_blank" /> <area shape="rect" 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