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鎮ㄥソ锛屾杩庝締鍒扮董搴浕瀛愬競鍫寸恫(w菐ng) 鐧婚寗 | 鍏嶈不娉ㄥ唺

浣庨�熸暩(sh霉)妯¤綁(zhu菐n)鎻涘櫒
闁辫畝锛�4623鏅傞枔锛�2010-12-23 10:15:02

銆�銆�鐣�(d膩ng)閬告搰鏁�(sh霉)妯�杞�(zhu菐n)鎻涘櫒 (DAC) 鏅傦紝瑷�(sh猫)瑷堝斧鍙互寰炵ó椤炵箒澶氱殑 IC 涓伕鎿�銆侱AC 鍙互閲濆皪鍏烽珨鐨勬噳(y墨ng)鐢ㄥ妰鍒嗘垚寰堝涓嶅悓椤炲垾銆備笉閬�锛孌AC 鐨勫妰鍒嗕篃鍙互绨″寲锛屽儏鍒嗘垚 DC 鎴栦綆閫熻(di脿o)绡�(ji茅)鎵�闇�鐨� DAC鍜岀敘(ch菐n)鐢熼珮閫熸尝褰㈡墍闇�鐨� DAC銆� 鏈枃灏堟敞浜庝綆閫熸噳(y墨ng)鐢ㄦ墍闇�鐨� DAC锛岃�岀劇璜栬┎鎳�(y墨ng)鐢ㄦ槸浣�鍒嗚鲸鐜�閭勬槸楂樺垎杈ㄧ巼銆佹槸绮楃暐瑾�(di脿o)绡�(ji茅)閭勬槸绮剧窗瑾�(di脿o)绡�(ji茅)銆�

銆�銆�灏遍伕鎿囦綆閫� DAC 鑰岃█锛屾焙瀹氳ō(sh猫)瑷堟槸闁夌挵(hu谩n)銆侀枊鐠�(hu谩n)鎴�"瑷�(sh猫)瀹氬悗渚夸笉闇�鍐嶉亷鍟�"鐨勭郴绲�(t菕ng)鏄緢閲嶈銆傛瘡涓�绋ō(sh猫)瑷堥兘闇�瑕佷竴鍊嬪叿鏌愪簺闂�(gu膩n)閸垫�ц兘瑕�(gu墨)鏍肩殑 DAC銆�

闁夌挵(hu谩n)绯荤当(t菕ng)

銆�銆�闁夌挵(hu谩n)绯荤当(t菕ng)鍖呮嫭涓�姊濆弽楗嬮�氳矾锛屼互妾㈡脯鍜屾牎婧�(zh菙n)浠讳綍瑾ゅ樊銆傚偝鎰熷櫒鏍规摎(j霉)璜稿浼烘湇闆诲嫊姗熴�佹祦閲忛枼鎴栨韩搴︽娓柈鍏冪瓑鐨勭墿鐞嗗弮鏁�(sh霉)鐩�(ji膩n)瑕栬几鍑�銆傜劧鍚庡偝鎰熷櫒灏囨暩(sh霉)鎿�(j霉)楗嬮�佸洖鎺у埗鍣紝鑰屾帶鍒跺櫒鍓囧埄鐢ㄩ�欏�嬩俊鎭焙瀹氭槸鍚﹂渶瑕佹牎姝�銆�

銆�銆�DAC 鍜屾ā鏁�(sh霉)杞�(zhu菐n)鎻涘櫒 (ADC) 鏄綅浜庨枆鐠�(hu谩n)绯荤当(t菕ng)鏍稿績鐨勯棞(gu膩n)閸电祫浠�銆侱AC 鐢ㄥ湪鍓嶉閫氳矾涓互瑾�(di脿o)绡�(ji茅)绯荤当(t菕ng)锛孉DC 鐢ㄥ湪鍙嶉閫氳矾涓紝浠ョ洠(ji膩n)瑕栭�欎簺瑾�(di脿o)绡�(ji茅)鐨勬晥鏋�銆傚畠鍊戜竴璧锋柦鍔犲拰妾㈡脯妯℃摤鎺у埗淇¤櫉锛屼互鐪熷鍦拌(di脿o)绡�(ji茅)瀹冨�戞帶鍒剁殑鍙冩暩(sh霉)銆�

銆�銆�闆诲嫊姗熸帶鍒舵槸閫欓闁夌挵(hu谩n)绯荤当(t菕ng)鐨勪竴鍊嬩緥瀛愶紝棣栧厛锛屽皣涓�鍊嬫兂瑕佺殑杓稿嚭 (瑷�(sh猫)瀹氶粸) 鍔犲埌鎺у埗鍣ㄤ笂锛屾帶鍒跺櫒灏嶉�欏�嬭几鍑哄拰鍙嶉淇¤櫉閫茶姣旇純銆傚鏋滈渶瑕佹牎姝�锛岄偅涔堟帶鍒跺櫒鏈冭(di脿o)绡�(ji茅) DAC 鐨勮几鍏ョ法纰硷紝鐒跺悗 DAC 鍦ㄥ叾杓稿嚭绔敘(ch菐n)鐢熶竴鍊嬫ā鎿浕澹�銆傝┎ DAC 鐨勮几鍑洪浕澹撻�氶亷涓�鍊嬪姛鐜囨斁澶у櫒鏀惧ぇ锛屼互绲﹂浕鍕曟鎻愪緵鎵�闇�鐨勯﹨(q奴)鍕曢浕娴併��

闁嬬挵(hu谩n)绯荤当(t菕ng)

銆�銆�闁嬬挵(hu谩n)绯荤当(t菕ng)娌掓湁鍙嶉閫氳矾銆傞�欐剰鍛宠憲锛岀郴绲�(t菕ng)鑷韩蹇呴爤鏄簴(zh菙n)纰虹殑銆傞枊鐠�(hu谩n)鎺у埗灏嶄簬鑹ソ瀹氱京鐨勭郴绲�(t菕ng)鏄湁鐢ㄧ殑锛屽湪閫欓绯荤当(t菕ng)涓紝杓稿叆绶ㄧ⒓鍙婂叾鍦ㄨ矤杓変笂鎵�灏�(d菐o)鑷磋鍕曚箣闁撶殑闂�(gu膩n)绯绘槸宸茬煡鐨�銆傚鏋滆矤杓変笉鏄潪甯稿彲闋�(y霉)娓殑锛岄偅涔堜娇鐢ㄩ枆鐠�(hu谩n)鎺у埗銆�

銆�銆�DAC 椹�(q奴)鍕曞噷鍔涚埦鐗圭┅(w臎n)澹撳櫒 LT3080 鐨� SET 闆诲寮曡叧銆係ET 寮曡叧鏄宸斁澶у櫒鐨勮几鍏ュ拰杓稿嚭闆诲鐨勮(di脿o)绡�(ji茅)瑷�(sh猫)瀹氶粸銆侺T3080 鐨勮几鍑洪浕澹撹寖鍦嶇偤 0V 鑷抽瀹氳几鍑洪浕澹撱��

銆�銆�DAC 鐨勫垎杈ㄧ巼姹哄畾 SET 寮曡叧瑾�(di脿o)绡�(ji茅)鐨勬閫插ぇ灏�銆備緥濡傦紝涓�鍊嬪叿鏈� 5V 鍩烘簴(zh菙n)鐨� 8 浣� DAC 鏈� 5V / 28 = 19.5mV 鐨� LSB銆備竴鍊嬪叿鏈夊悓妯� 5V 鍩烘簴(zh菙n)鐨� 12 浣� DAC 鏈� 1.2mV 鐨� LSB锛屼竴鍊� 16 浣� DAC 鏈� 76渭V 鐨� LSB銆傞�欐剰鍛宠憲锛屽氨涓�鍊嬬悊鎯� DAC 鑰岃█锛屾暩(sh霉)瀛楃法纰兼瘡澧炲ぇ涓�娆★紝妯℃摤杓稿嚭閮芥噳(y墨ng)瑭插鍔� 76渭V銆�

銆�銆�闁嬬挵(hu谩n)绯荤当(t菕ng)涓殑鍏朵粬閲嶈鍙冩暩(sh霉)鍖呮嫭鍋忕Щ銆佸鐩婅宸�銆佸熀婧�(zh菙n)闆诲瑾ゅ樊浠ュ強閫欎簺鍙冩暩(sh霉)闅ㄦ檪闁撳拰婧害璁婂寲鐨勭┅(w臎n)瀹氭��銆侷NL 灏ゅ叾閲嶈锛屽洜鐐鸿垏闁夌挵(hu谩n)绯荤当(t菕ng)鐩告瘮锛孌AC 鐨� INL 灏嶇郴绲�(t菕ng)鐨勭附楂旂窔鎬у害鏈夌洿鎺ュ奖闊�銆�

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銆�銆�涓�鏃︽焙瀹氫簡闁夌挵(hu谩n)銆侀枊鐠�(hu谩n)鎴�"瑷�(sh猫)瀹氬悗渚夸笉闇�鍐嶉亷鍟�"绯荤当(t菕ng)鐨勯鍨�锛屽氨瑭查伕鎿囩殑 DAC 浜�銆傛濡備箣鍓嶆彁鍒扮殑閭ｆǎ锛屾湁浜涙噳(y墨ng)鐢ㄩ渶瑕佺矖鐣ヨ(di脿o)绡�(ji茅)锛岄�欐剰鍛宠憲绯荤当(t菕ng)鍍呴渶瑕佹湁闄愭暩(sh霉)閲忕殑鍙畩瑷�(sh猫)缃�銆傚湪閫欑ó鎯呮硜涓�锛�8 浣嶆垨 10 浣嶅垎杈ㄧ巼鐨� DAC 涓�鑸氨瓒冲浜嗐�傚氨闇�瑕佹洿绮剧窗鎺у埗鐨勭郴绲�(t菕ng)鑰岃█锛�12 浣� DAC 鍙互鎻愪緵瓒冲鐨勫垎杈ㄧ巼銆傚湪浠婂ぉ鐨勫競鍫翠笂锛�16 浣嶅拰 18 浣� DAC 鎻愪緵鏈�绮剧窗鐨勬瘡 LSB 鍒嗚鲸鐜囥��

銆�銆�LTC2600 鏄竴绋� 16 浣� 8 閫氶亾 DAC锛屾槸鐐洪枆鐠�(hu谩n)绯荤当(t菕ng)鑰岃ō(sh猫)瑷堢殑?锛熷寙骞屾护顝�?DC 鎬ц兘瑕�(gu墨)鏍兼渻鐧�(f膩)鐝�(xi脿n)閫欐槸寰堟槑椤殑銆傚吀鍨嬬殑 INL 鏄� 卤12LSB锛屽�肩偤 卤64LSB銆傚吀鍨嬬殑 INL 闅ㄨ几鍏ヤ唬纰肩殑璁婂寲鏇茬窔鍦ㄥ湒 5 鐨勪笅閮ㄩ’绀轰簡閫欎簺鎬ц兘瑕�(gu墨)鏍�銆�16 浣嶅柈瑾�(di脿o)鎬у拰 卤1LSB DNL 瑾ゅ樊鍏佽ū鍦ㄥ墠楗嬮�氳矾涓�茶绮炬簴(zh菙n)鎺у埗銆傛濡傚墠闈㈡彁鍒扮殑閭ｆǎ锛屽墠楗嬭宸皪闁夌挵(hu谩n)绯荤当(t菕ng)渚嗚涓嶉噸瑕�锛屽彧瑕佽┎ DAC 鏄柈瑾�(di脿o)鐨勫氨琛屻��

銆�銆�鐩稿弽锛屾柊鐨� LTC2656 鏄竴绋� 8 閫氶亾 DAC锛屾墍鏈� 8 鍊� DAC 閮芥彁渚� 16 浣嶅柈瑾�(di脿o)鎬у拰鍗撹秺鐨� 卤4LSB INL 瑾ゅ樊锛屽緸鑰屼娇瑭插櫒浠跺彲鑳藉悓鏅傞仼鍚堥枊鐠�(hu谩n)鍜岄枆鐠�(hu谩n)绯荤当(t菕ng)銆侺TC2656 灏佽涓墍鏈� 8 鍊� DAC 鐨勫吀鍨� INL 闅ㄤ唬纰艰畩鍖栫殑鏇茬窔濡傚湒 5 鎵�绀�銆傚湪 16 浣� 8 閫氶亾 DAC 椤炲垾涓紝LTC2656 鎻愪緵 INL銆�

銆�銆�鍠�嬪皝瑁濅腑鐨� 8 鍊� DAC 閮藉鐝�(xi脿n)楂樼窔鎬у害涓嶆槸涓�鍊嬪鏄撶殑瑷�(sh猫)瑷堜换鍕�(w霉)銆傚皝瑁濆鍔涘拰闆诲闅ㄦ韩搴︾殑婕傜Щ閮藉繀闋堝湪瑷�(sh猫)瑷堜腑鑰冩叜鍒�銆傚柈鍊� DAC 瀵︾従(xi脿n)杓冨毚鏍肩殑 INL 鎬ц兘瑕�(gu墨)鏍兼渻瀹规槗寰楀銆備緥濡�锛屽噷鍔涚埦鐗瑰叕鍙告彁渚涚殑 LTC2641 鏄竴绋柈 16 浣� DAC锛岃┎鍣ㄤ欢鎻愪緵 卤1LSB INL 鍜� DNL 鐨� DC 鎬ц兘瑕�(gu墨)鏍�銆�

銆�銆�闄や簡 INL 鍜� DNL锛屽叾浠栬鑰冩叜鐨勯噸瑕� DC 鎬ц兘瑕�(gu墨)鏍兼槸鍋忕Щ瑾ゅ樊 (鎴栭浂妯�(bi膩o)搴﹁宸�) 鍜屽鐩婅宸� (婊挎(bi膩o)搴﹁宸�)銆傚亸绉昏宸〃绀�锛屽湪 (鎴栨帴杩�) 闆舵(bi膩o)搴﹁几鍏ョ法纰兼檪锛屽闅涘偝閬炲嚱鏁�(sh霉)鑸囩悊鎯冲偝閬炲嚱鏁�(sh霉)鐨勫尮閰嶇▼搴�銆傚氨闇�瑕佺洿鍒板湴鐨勭簿婧�(zh菙n)鎺у埗鎳�(y墨ng)鐢ㄨ�岃█锛屽亸绉昏宸槸闈炲父閲嶈鐨�銆侺TC2656 鎻愪緵闈炲父浣庣殑 卤2mV 鍋忕Щ瑾ゅ樊銆�

銆�銆�澧炵泭瑾ゅ樊琛ㄧず瀵﹂殯鍌抽仦鍑芥暩(sh霉)鏂滅巼鑸囩悊鎯冲偝閬炲嚱鏁�(sh霉)鏂滅巼鐨勫尮閰嶇▼搴�銆傚鐩婅宸拰婊挎(bi膩o)搴﹁宸湁鏅傚彲浜掓彌浣跨敤锛屼絾鏄豢妯�(bi膩o)搴﹁宸悓鏅傚寘鎷鐩婅宸拰鍋忕Щ瑾ゅ樊銆侺TC2656 鎻愪緵 卤64LSB 鐨勫鐩婅宸�锛岄�欑瓑浜庢豢妯�(bi膩o)搴︾殑0.098% (64/65536)锛屾槸涓�鍊嬮潪甯稿皬鐨勫鐩婅宸��

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