1銆€寮曡█ 鍦ㄩ姗�(j墨)涓婏紝閫氬父鍒╃敤姗�(j墨)楂斾綔鐐轰竴鏍逛緵闆诲皫(d菐o)绶�銆傜偤浜嗕繚璀夐姗�(j墨)鐨勬甯镐緵闆伙紝瑕佹眰寰炴(j墨)闋埌姗�(j墨)灏剧殑姗�(j墨)楂旈浕闃诲繀闋堝皬浜�0.005姝愬锛屽嵆5姣瓙濮嗭紝鎵嶄笉鑷充簬褰遍熆椋涙(j墨)鐨勬甯镐緵闆�銆� 浠ュ線灏�(du矛)浜庣壒浣庨浕闃诲€肩殑娓�(c猫)閲忛€氬父閲囩敤姣旇純鐨勬柟娉�锛屽嵆鎵嬪嫊(d貌ng)瑾�(di脿o)绡€(ji茅)闆绘⿱骞宠　锛屽湪绮惧瘑闆婚樆绠变笂寰楀埌璁€鏁�(sh霉)锛屾鏂规硶鏃㈡參鍙堜笉婧�(zh菙n)纰�銆傚嵆浣块噰鐢�6浣嶅崐鐨勯珮绮惧害鏁�(sh霉)瀛楄〃鐩存帴娓�(c猫)閲忛浕闃�锛屽叾闆婚樆娓�(c猫)閲忕殑鍒嗚鲸鐜囦篃鍙兘閬�(d谩)鍒�10姣瓙濮嗐€傞€欒(shu艒)鏄庢脯(c猫)閲忔(j墨)楂旈浕闃绘槸涓€鍊�(g猫)姣旇純鍥伴洠鐨勮秴浣庨樆鍊兼脯(c猫)閲忓晱(w猫n)椤�銆� 2銆€绯荤当(t菕ng)瑷�(sh猫)瑷�(j矛)鑸囪宸垎鏋� 灏囨脯(c猫)瑭︾窔璺強娓�(c猫)瑭﹀剙鍏�(n猫i)閮ㄧ殑绶氳矾闆婚樆鑰冩叜鍦ㄥ収(n猫i)鏅�(sh铆)锛岄浕闃诲€肩殑娓�(c猫)閲忚寖鍦嶈閬�(d谩)鍒�100姣瓙濮�锛涚偤浜嗘簴(zh菙n)纰烘脯(c猫)閲忓嚭姗�(j墨)楂旈浕闃�锛屽垎杈ㄧ巼瑕侀仈(d谩)鍒�0.1姣瓙濮�銆� 寰炵悊璜栦笂瑾�(shu艒)閲囩敤24bit鐨凙/D杞�(zhu菐n)鎻涘櫒锛岃嫢杓稿叆閲忕▼鐐�5V锛屽墖鍒嗚鲸鐜囧彲閬�(d谩)锛� 銆€銆€ LSB=5/锛�224-1锛�=0.29寰紡 銆€銆€ 鍗�1mA闆绘祦娴侀亷(gu貌)1姣瓙濮嗛浕闃荤敘(ch菐n)鐢熺殑1寰紡闆诲闄嶄篃鑳芥脯(c猫)閲忓嚭渚�(l谩i)銆備絾閫欑渷鐣ヤ簡涓€鍊�(g猫)鍓嶆彁锛氳娓�(c猫)閲忎俊铏�(h脿o)鐨勪俊鍣瘮蹇呴爤闈炲父楂�銆傚鏋滅窔璺殑鍣伈閬�(d谩)鍒�1mV锛岄偅涔堝嵆浣�1A闆绘祦鍦�1姣瓙濮嗛浕闃讳笂鐢�(ch菐n)鐢熺殑1mV闆诲淇¤櫉(h脿o)涔熸娓�(c猫)涓嶅嚭渚�(l谩i)銆� 銆€銆€鏍规摎(j霉)闇€瑕佹脯(c猫)閲忕殑闆婚樆鍊艰寖鍦嶅拰灏�(du矛)琚脯(c猫)閲忎俊铏�(h脿o)淇″櫔姣旂殑瑕佹眰锛岃ō(sh猫)瑷�(j矛)鐨勭郴绲�(t菕ng)鍘熺悊绲�(ji茅)妲�(g貌u)濡傚湒1鎵€绀�銆� 娓�(c猫)瑭︾郴绲�(t菕ng)鐨勮宸垎鐐洪噺鍖栬宸攄鍜屾ā鎿宸攎鍏╅儴鍒�?锛熸潃纭庣犯妞�? 銆€銆€ 螖d=A/D杞�(zhu菐n)鎻涘櫒鐨勭⿳鍒嗛潪绶氭€ц宸甀(l菒ng)NL+A/D杞�(zhu菐n)鎻涘櫒鐨勫井鍒嗛潪绶氭€ц宸瓺NL+閲忓寲瑾ゅ樊LSB 螖m=琚脯(c猫)閲忕殑闆婚樆锛婃瘮渚嬭宸郴鏁�(sh霉)+绯荤当(t菕ng)甯告暩(sh霉)瑾ゅ樊鍗侀毃姗�(j墨)瑾ゅ樊 銆€銆€ 涓婂紡涓焙瀹氭瘮渚嬭宸郴鏁�(sh霉)鐨勪富瑕佸洜绱犳槸鎭掓祦婧愮簿搴�銆佸悇鍊�(g猫)鐠�(hu谩n)绡€(ji茅)鐨勬韩婕傚拰澧炵泭瑾ゅ樊绛�銆傛焙瀹氱郴绲�(t菕ng)甯告暩(sh霉)瑾ゅ樊鐨勪富瑕佸洜绱犳槸绯荤当(t菕ng)鍏�(n猫i)閮ㄧ窔璺�銆佹脯(c猫)瑭︾窔璺拰鍚勫€�(g猫)鐠�(hu谩n)绡€(ji茅)鐨勮(di脿o)闆�銆傛焙瀹氶毃姗�(j墨)瑾ゅ樊鐨勪富瑕佸洜绱犳槸闅ㄦ(j墨)鎺ヨЦ闆婚樆銆佺郴绲�(t菕ng)鍣伈鍜屽閮ㄥ共鎿俱€� 3銆€闂�(gu膩n)閸甸浕璺伕鍨� 3.1銆€浣庢紓绉诲ぇ闆绘祦绮惧瘑鎭掓祦婧愰浕璺� 鐞嗚珫鍜屽厓鍣ㄤ欢鏁�(sh霉)鎿�(j霉)璩囨枡琛ㄦ槑锛屼互榻婄磵浜屾サ绠＄偤鍩烘簴(zh菙n)鐨勭簿瀵嗛浕澹撳弮鑰冩簮鐨勬€ц兘鍎�(y艒u)浜庝互鑳藉付鐐哄熀婧�(zh菙n)鐨勬亽娴佹簮锛屽洜姝ら噰鐢ㄩ珮鎬ц兘鐨勭簿瀵嗛浕澹撳弮鑰冩簮闁撴帴寰楀埌闇€瑕佺殑绮惧瘑鐩告祦婧�銆傞浕璺鍦�2鎵€绀�銆� [align=center] 鍦�2 楂樼簿瀵嗕綆婧紓鎭掓祦婧愰浕璺痆/align] REF102鏄�10V绮惧瘑闆诲鍙冭€冩簮锛岀簿搴︾偤卤0.0025V锛屾韩婕傜偤2.5ppm/鈩僲ax锛屽彲婊�(m菐n)瓒虫湰绯荤当(t菕ng)闆婚樆娓�(c猫)閲忕殑瑕佹眰銆侽PA111绮惧瘑閬�(y霉n)绠楁斁澶у櫒浣滅偤闆诲璺熼毃鍣�锛屼娇寰桼EF102鐨凣ND绔拰鏀惧ぇ鍣ㄧ殑鍚岀浉绔浉绛�锛屽嵆R锛婄偤楂樼簿搴�銆佷綆婧紓鐨勭簿瀵嗛浕闃�锛屽墖娴侀亷(gu貌)RL鐨勯浕娴佺偤绮惧瘑鎭掑畾闆绘祦銆傛暣鍊�(g猫)闆昏矾绛夋晥鐐烘亽娴佹簮闆昏矾銆� 鎭掓祦婧愭摯(ku貌)灞曢浕璺鍦�3鎵€绀�锛岄亱(y霉n)绠楁斁澶у櫒宸ヤ綔鍦ㄩ枊(k膩i)鐠�(hu谩n)鐙€鎱�(t脿i)锛岀敱浜庡悓鐩哥鍜屽弽鐩哥鐨勫宸咕涔庣偤闆�锛岄亱(y霉n)绠楁斁澶у櫒鐨勫亸缃浕娴佸彲浠ュ拷鐣ヤ笉瑷�(j矛)锛屽洜姝ゆ亽娴佹簮闆绘祦鍦∟R涓婄殑澹撻檷鑸嘨MOS鍫�(ch菐ng)鏁堟噳(y墨ng)绠＄殑婧愭サ闆绘祦鍦≧涓婄殑澹撻檷蹇呭畾鐩哥瓑銆傜暥(d膩ng)閬告搰 I1=1mA,NR=999R鏅�(sh铆) 鍓嘔s=999锛奍1=999mA 鎵€浠0=I1+Is=1mA+999mA=1.000A 銆€銆€ 閬告搰NR銆丷鐐洪珮绮惧害浣庢韩婕傞浕闃伙紝OPA602鐐虹簿瀵嗛亱(y霉n)绠楁斁澶у櫒锛屽墖鎿�(ku貌)灞曞悗杓稿嚭鐨勯浕娴佹槸绮惧瘑鎭掓祦婧�銆� 3.2銆€A/D杞�(zhu菐n)鎻涜垏鍠墖姗�(j墨)绯荤当(t菕ng) 銆€銆€ 鐢变簬娓�(c猫)瑭﹂噺绋嬭閬�(d谩)100姣瓙銆佸垎杈ㄧ巼瑕佸皬浜�0.1姣瓙锛屾墍浠/D杞�(zhu菐n)鎻涘櫒鐨勪簩閫�(j矛n)鍒剁法纰兼暩(sh霉)鑷冲皯瑕侀仈(d谩)鍒�1000鍊�(g猫)锛岀浉鐣�(d膩ng)浜�10浣嶇殑A/D杞�(zhu菐n)鎻涘櫒?锛熺搐]鍒板櫔鑱茬殑褰遍熆浠ュ強A/D杞�(zhu菐n)鎻涘櫒鐨勫樊鍒嗛潪绶氭€NL銆佺⿳鍒嗛潪绶氭€L鍜岄噺鍖栬宸甃SB锛岄伕鎿�16浣嶇殑涓茶鎺ュ彛A/D杞�(zhu菐n)鎻涘櫒ADS7809銆傝ō(sh猫)瀹氬叾杓稿叆閲忕▼鐐�10V锛屽墖鍒嗚鲸鐜囩偤0.1525mV銆傜暥(d膩ng)琚脯(c猫)閲忕殑闆婚樆鏈€澶у€肩偤100姣瓙锛屾亽娴佹簮闆绘祦鐐�1A鏅�(sh铆)锛岃娓�(c猫)闆婚樆涓婄殑澹撻檷鐐�0.1V銆傜偤鎻愰珮娓�(c猫)瑭︾殑绮惧害锛屽皣姝や俊铏�(h脿o)鏀惧ぇ100鍊嶉仈(d谩)鍒�10V锛屽墖鐞嗚珫涓�0.1姣瓙鐨勯浕闃诲彲鐢�(ch菐n)鐢�10mV鐨勯浕澹撻檷锛孉/D杞�(zhu菐n)鎻涘悗鐨勮畝鏁�(sh霉)鍙仈(d谩)65LSB锛屽彲鍏呭垎淇濊瓑娓�(c猫)閲忕殑绮惧害銆� [align=center] 鍦�3 绮惧瘑鎿�(ku貌)灞曟亽娴佹簮闆昏矾[/align] 4銆€闂�(gu膩n)閸佃宸殑娑堥櫎 4.1銆€纭欢婵炬尝闆昏矾 銆€銆€ 鐢变簬姗�(j墨)楂旀槸涓€鍊�(g猫)澶х殑灏�(d菐o)楂旓紝鍏舵劅鎳�(y墨ng)鐨勫共鎿句俊铏�(h脿o)寰堝挤(qi谩ng)锛屾(j墨)涓婅ō(sh猫)鍌欏伐浣滄檪(sh铆)涔熸渻(hu矛)鐢�(ch菐n)鐢熻純澶х殑骞叉摼銆傝€屾(j墨)楂旈浕闃绘槸涓€鍊�(g猫)姣旇純绌�(w臎n)瀹氱殑鍊�锛屽湪鎭掓祦婧愮殑婵€鍕�(l矛)涓嬬敘(ch菐n)鐢熺殑闆诲淇¤櫉(h脿o)鏄瘮杓冪┅(w臎n)瀹氱殑淇¤櫉(h脿o)锛岀悊璜栦笂杩戜技濡傜洿娴併€傚洜姝ゅ湪灏囨脯(c猫)閲忎俊铏�(h脿o)鍔犲埌A/D杞�(zhu菐n)鎻涘櫒涔嬪墠鍏堢稉(j墨ng)閬�(gu貌)涓€鍊�(g猫)鏈夋簮浣庨€氭烤娉㈠櫒锛岃ō(sh猫)瀹氳純浣庣殑鎴闋荤巼鍙烤闄や竴鍒囦氦娴佸共鎿俱€� 4.2銆€杌熶欢婵炬尝 鐐洪€�(j矛n)涓€姝ユ彁楂樼郴绲�(t菕ng)鎶楀共鎿惧拰鍣伈鐨勮兘鍔�锛屼繚璀夋脯(c猫)瑭︾殑绮惧害锛屽皪(du矛)鐛插緱鐨勬脯(c猫)閲忓€奸€�(j矛n)琛屾暩(sh霉)瀛楁烤娉㈣檿鐞�锛屽嵆閫�(j矛n)琛�256娆℃脯(c猫)閲忓悗鍙栧钩鍧囧€�銆傜稉(j墨ng)閬�(gu貌)杌�銆佺‖浠舵烤娉㈣檿鐞嗗悗鐨勭郴绲�(t菕ng)瑾ゅ樊鍍呭儏卤1LSB銆� 4.3銆€娓�(c猫)瑭﹂€ｆ帴绶氬強鍏惰垏姗�(j墨)涓婃脯(c猫)瑭﹂粸(di菐n)闅ㄦ(j墨)鎺ヨЦ闆婚樆鐨勬秷闄� 鎭掓祦婧愰浕娴佹祦缍�(j墨ng)鐨勭郴绲�(t菕ng)鍏�(n猫i)閮ㄧ窔璺浕闃诲拰閫ｆ帴椋涙(j墨)鐨勬脯(c猫)瑭﹀皫(d菐o)绶氱殑灏�(d菐o)绶氶浕闃诲彲閬�(d谩)涓夊崄骞炬姝�锛屽彲浣滅偤绯荤当(t菕ng)甯告暩(sh霉)瑾ゅ樊浜堜互娑堥櫎銆� 銆€銆€ 闆ｄ互娑堥櫎鐨勮宸槸闅ㄦ(j墨)瑾ゅ樊锛屼締(l谩i)鑷簬娓�(c猫)瑭︾窔璺垏姗�(j墨)涓婇€ｆ帴榛�(di菐n)鐨勯毃姗�(j墨)鎺ヨЦ闆婚樆銆傛瘡娆℃脯(c猫)閲忔檪(sh铆)锛屾摪绶婃脯(c猫)瑭︾窔鐨勫姏搴︿笉鍚�銆佹帴瑙歌〃闈㈢殑娓呮綌搴︿笉鍚�锛屽叾鎺ヨЦ闆婚樆瀹屽叏鏄毃姗�(j墨)鐨勶紝璁婂寲鑼冨湇鍙仈(d谩)骞惧€�(g猫)姣瓙銆傜偤姝ら噰鐢ㄥ鍦�4鎵€绀虹殑娓�(c猫)瑭﹂€ｆ帴闆昏矾浜堜互娑堥櫎銆� [align=center] 鍦�4 娑堥櫎闅ㄦ(j墨)瑾ゅ樊鐨勬脯(c猫)瑭﹂€ｆ帴鍦朳/align] 娓�(c猫)瑭﹀師鐞嗘槸鍥涚窔娓�(c猫)瑭︽硶銆傞伕鎿嘗1锝濴4鍥涙牴灏�(d菐o)绶氱偤鐩稿悓灏�(d菐o)绶氶浕闃荤殑閸嶉妧灏�(d菐o)绶�銆侻1銆丮2鐐烘(j墨)涓婃脯(c猫)瑭﹂€ｆ帴榛�(di菐n)銆傚湪鍚屼竴鍊�(g猫)娓�(c猫)瑭﹂粸(di菐n)涓婃摪绶婂叐鏍规脯(c猫)瑭︾窔锛孡1鍜孡2锛孡3鍜孡4銆傚皫(d菐o)绶氱殑鍙︿竴绔帴鑷虫脯(c猫)瑭︽帴绶氱洅鐨勬帴瑙搁浕闃诲皬浜�0.05姣瓙鐨勏�6閸嶉噾鎺ョ窔鏌�銆傞噰鐢ㄦ墜鍕�(d貌ng)閫ｆ帴娲诲嫊(d貌ng)閸嶉噾鎺ョ窔鐗囩殑杈︽硶锛屾(g貌u)鎴愪笁绋脯(c猫)瑭︾媭鎱�(t脿i)锛歊+鎺1銆丷鈥旀帴N1锛屾脯(c猫)閲忓嚭L1銆丩2鍙婃帴瑙搁粸(di菐n)M1鐨勬帴瑙搁浕闃�锛汻+鎺2銆丷鈥旀帴T2锛屾脯(c猫)閲忓嚭L3銆丩4鍙婃帴瑙搁粸(di菐n)M2鐨勬帴瑙搁浕闃�銆傚皣閫欏叐鍊�(g猫)闆婚樆鍊煎彇骞冲潎鍊间綔鐐烘脯(c猫)瑭︾窔璺殑绯荤当(t菕ng)瑾ゅ樊銆傛渶鍚庢脯(c猫)鍑篟+鎺2銆丷鈥旀帴N1鐨勯浕闃诲€�锛屾笡鍘讳笂杩版脯(c猫)寰楃殑娓�(c猫)瑭︾窔璺郴绲�(t菕ng)瑾ゅ樊锛屽嵆寰楀埌姗�(j墨)楂旈浕闃诲€�銆� 5銆€娓�(c猫)瑭﹁粺浠舵祦绋嬪湒 濡傚湒5鎵€绀�锛屽柈鐗囨(j墨)閲囩敤鏌ヨ(x煤n)鏂瑰紡闊挎噳(y墨ng)娓�(c猫)瑭﹂嵉鎺�銆傜敤4鍊�(g猫)閸靛皪(du矛)鎳�(y墨ng)鍥涘€�(g猫)娓�(c猫)瑭︾媭鎱�(t脿i)锛屼笖鍙婃檪(sh铆)椤ず娓�(c猫)瑭︾祼(ji茅)鏋滀互渚夸簬鎿嶄綔鑰呭垽鏂�銆傜▼搴忓垽鏂峰洓鍊�(g猫)闆婚樆娓�(c猫)瑭﹀畬鍚庯紝鑷嫊(d貌ng)淇鍚勭ó瑾ゅ樊锛岄’绀哄苟鎵撳嵃鍑烘墍娓�(c猫)寰楃殑姗�(j墨)楂旈浕闃诲€硷紝骞堕檮甯跺叾浠栦俊鎭�锛屼互渚夸簬淇濆瓨鍜岄(y脿n)璀�銆�