AD:模æ°è½¬æ¢ï¼å°æ¨¡æä¿¡å·åææ°åä¿¡å·ï¼ä¾¿äºæ°å设å¤å¤çã DAï¼æ°æ¨¡è½¬æ¢ï¼å°æ°åä¿¡å·è½¬æ¢ä¸ºæ¨¡æä¿¡å·ä¸å¤é¨ä¸çæ¥å£ã å
·ä½å¯ä»¥ççä¸é¢çèµæï¼äºè§£ä¸ä¸å·¥ä½åçï¼ 1. AD转æ¢å¨çåç±» ä¸é¢ç®è¦ä»ç»å¸¸ç¨çå ç§ç±»åçåºæ¬åçåç¹ç¹ï¼ç§¯ååãé次é¼è¿åã并è¡æ¯è¾å/串并è¡åãâ-Îè°å¶åãçµå®¹éµåé次æ¯è¾åååé¢åæ¢åã 1ï¼ç§¯ååï¼å¦TLC7135ï¼ ç§¯ååADå·¥ä½åçæ¯å°è¾å
¥çµå转æ¢ææ¶é´(èå²å®½åº¦ä¿¡å·)æé¢ç(èå²é¢ç)ï¼ç¶åç±å®æ¶å¨/计æ°å¨è·å¾æ°åå¼ãå
¶ä¼ç¹æ¯ç¨ç®åçµè·¯å°±è½è·å¾é«å辨çï¼ä½ç¼ºç¹æ¯ç±äºè½¬æ¢ç²¾åº¦ä¾èµäºç§¯åæ¶é´ï¼å æ¤è½¬æ¢éçæä½ãåæçåçAD转æ¢å¨å¤§å¤éç¨ç§¯ååï¼ç°å¨é次æ¯è¾åå·²éæ¥æ为主æµã 2ï¼é次æ¯è¾åï¼å¦TLC0831ï¼ é次æ¯è¾åADç±ä¸ä¸ªæ¯è¾å¨åDA转æ¢å¨éè¿é次æ¯è¾é»è¾ææï¼ä»MSBå¼å§ï¼é¡ºåºå°å¯¹æ¯ä¸ä½å°è¾å
¥çµåä¸å
ç½®DA转æ¢å¨è¾åºè¿è¡æ¯è¾ï¼ç»n次æ¯è¾èè¾åºæ°åå¼ãå
¶çµè·¯è§æ¨¡å±äºä¸çãå
¶ä¼ç¹æ¯é度è¾é«ãåèä½ï¼å¨ä½å辩çï¼<12ä½ï¼æ¶ä»·æ ¼ä¾¿å®ï¼ä½é«ç²¾åº¦ï¼>12ä½ï¼æ¶ä»·æ ¼å¾é«ã 3ï¼å¹¶è¡æ¯è¾å/串并è¡æ¯è¾åï¼å¦TLC5510ï¼ å¹¶è¡æ¯è¾åADéç¨å¤ä¸ªæ¯è¾å¨ï¼ä»
ä½ä¸æ¬¡æ¯è¾èå®è¡è½¬æ¢ï¼å称FLash(å¿«é)åãç±äºè½¬æ¢éçæé«ï¼nä½ç转æ¢éè¦2n-1个æ¯è¾å¨ï¼å æ¤çµè·¯è§æ¨¡ä¹æ大ï¼ä»·æ ¼ä¹é«ï¼åªéç¨äºè§é¢AD转æ¢å¨çé度ç¹å«é«çé¢åã 串并è¡æ¯è¾åADç»æä¸ä»äºå¹¶è¡ååé次æ¯è¾åä¹é´ï¼æå
¸åçæ¯ç±2个n/2ä½ç并è¡åAD转æ¢å¨é
åDA转æ¢å¨ç»æï¼ç¨ä¸¤æ¬¡æ¯è¾å®è¡è½¬æ¢ï¼æ以称为Half flash(åå¿«é)åãè¿æåæä¸æ¥æå¤æ¥å®ç°AD转æ¢çå«åå级ï¼Multistep/Subranglingï¼åADï¼èä»è½¬æ¢æ¶åºè§åº¦åå¯ç§°ä¸ºæµæ°´çº¿ï¼Pipelinedï¼åADï¼ç°ä»£çå级åADä¸è¿å å
¥äºå¯¹å¤æ¬¡è½¬æ¢ç»æä½æ°åè¿ç®èä¿®æ£ç¹æ§çåè½ãè¿ç±»ADé度æ¯é次æ¯è¾åé«ï¼çµè·¯è§æ¨¡æ¯å¹¶è¡åå°ã 4ï¼â-Î(Sigma?/FONT>delta)è°å¶åï¼å¦AD7705ï¼ â-ÎåADç±ç§¯åå¨ãæ¯è¾å¨ã1ä½DA转æ¢å¨åæ°å滤波å¨çç»æãåçä¸è¿ä¼¼äºç§¯ååï¼å°è¾å
¥çµå转æ¢ææ¶é´(èå²å®½åº¦)ä¿¡å·ï¼ç¨æ°å滤波å¨å¤çåå¾å°æ°åå¼ãçµè·¯çæ°åé¨ååºæ¬ä¸å®¹æåçåï¼å æ¤å®¹æåå°é«å辨çã主è¦ç¨äºé³é¢åæµéã 5ï¼çµå®¹éµåé次æ¯è¾å çµå®¹éµåé次æ¯è¾åADå¨å
ç½®DA转æ¢å¨ä¸éç¨çµå®¹ç©éµæ¹å¼ï¼ä¹å¯ç§°ä¸ºçµè·ååé
åãä¸è¬ççµé»éµåDA转æ¢å¨ä¸å¤æ°çµé»çå¼å¿
é¡»ä¸è´ï¼å¨åè¯çä¸çæé«ç²¾åº¦ççµé»å¹¶ä¸å®¹æãå¦æç¨çµå®¹éµåå代çµé»éµåï¼å¯ä»¥ç¨ä½å»ææ¬å¶æé«ç²¾åº¦åçAD转æ¢å¨ãæè¿çé次æ¯è¾åAD转æ¢å¨å¤§å¤ä¸ºçµå®¹éµåå¼çã 6ï¼åé¢åæ¢åï¼å¦AD650ï¼ åé¢åæ¢åï¼Voltage-Frequency Converterï¼æ¯éè¿é´æ¥è½¬æ¢æ¹å¼å®ç°æ¨¡æ°è½¬æ¢çãå
¶åçæ¯é¦å
å°è¾å
¥ç模æä¿¡å·è½¬æ¢æé¢çï¼ç¶åç¨è®¡æ°å¨å°é¢ç转æ¢ææ°åéãä»ç论ä¸è®²è¿ç§ADçå辨çå ä¹å¯ä»¥æ éå¢å ï¼åªè¦éæ ·çæ¶é´è½å¤æ»¡è¶³è¾åºé¢çå辨çè¦æ±ç累积èå²ä¸ªæ°ç宽度ãå
¶ä¼ç¹æ¯å辩çé«ãåèä½ãä»·æ ¼ä½ï¼ä½æ¯éè¦å¤é¨è®¡æ°çµè·¯å
±åå®æAD转æ¢ã 2. AD转æ¢å¨ç主è¦ææ¯ææ 1ï¼å辩ç(Resolution) ææ°åéååä¸ä¸ªæå°éæ¶æ¨¡æä¿¡å·çååéï¼å®ä¹ä¸ºæ»¡å»åº¦ä¸2nçæ¯å¼ãå辩çå称精度ï¼é常以æ°åä¿¡å·çä½æ°æ¥è¡¨ç¤ºã 2ï¼è½¬æ¢éç(Conversion Rate)æ¯æå®æä¸æ¬¡ä»æ¨¡æ转æ¢å°æ°åçAD转æ¢æéçæ¶é´çåæ°ã积ååADç转æ¢æ¶é´æ¯æ¯«ç§çº§å±ä½éADï¼é次æ¯è¾åADæ¯å¾®ç§çº§å±ä¸éADï¼å
¨å¹¶è¡/串并è¡åADå¯è¾¾å°çº³ç§çº§ãéæ ·æ¶é´åæ¯å¦å¤ä¸ä¸ªæ¦å¿µï¼æ¯æ两次转æ¢çé´éã为äºä¿è¯è½¬æ¢çæ£ç¡®å®æï¼éæ ·éç(Sample Rate)å¿
é¡»å°äºæçäºè½¬æ¢éçãå æ¤æäººä¹ æ¯ä¸å°è½¬æ¢éçå¨æ°å¼ä¸çåäºéæ ·éçä¹æ¯å¯ä»¥æ¥åçã常ç¨åä½æ¯kspsåMspsï¼è¡¨ç¤ºæ¯ç§éæ ·å/ç¾ä¸æ¬¡ï¼kilo / Million Samples per Secondï¼ã 3ï¼éå误差(Quantizing Error) ç±äºAD
温馨提示:答案为网友推荐,仅供参考