AD7705参考手册

==99-10-14==P&SÎ人Á¦Ô´µç×ӹɷÝÓÐÏÞ¹«Ë¾==35-1==P&SÎ人Á¦Ô´µç×ӹɷÝÓÐÏÞ¹«Ë¾µØÖ·:ºþ±±Î人ÊÐ׿µ¶ÈªÂ·15ºÅÐÅÏä:Î人ÊÐ70020ÐÅÏäÓʱà:430079µç»°:(86)(027£©87493500¡«87493506´«Õæ:(86)(027)87491166,87493497P&SÍøÍøÖ·:http://www.p8s.comAD7705AD77063V/5V£¬1mW£¬2/3ͨµÀ16릲-¦¤Ä£Êýת»»Æ÷Ò»¡¢¸ÅÊö1.1Ò»°ã˵Ã÷AD7705/7706ÊÇÓ¦ÓÃÓÚµÍƵ²âÁ¿µÄ2/3ͨµÀµÄÄ£ÄâÇ°¶Ë¡£¸ÃÆ÷¼þ¿ÉÒÔ½ÓÊÜÖ±½ÓÀ´×Ô´«¸ÐÆ÷µÄµÍµçƽµÄÊäÈëÐźţ¬È»ºó²úÉú´®ÐеÄÊý×ÖÊä³ö¡£ÀûÓæ²-¦¤×ª»»¼¼ÊõʵÏÖÁË16λÎÞ¶ªÊ§´úÂëÐÔÄÜ¡£Ñ¡¶¨µÄÊäÈëÐźű»Ë͵½Ò»¸ö»ùÓÚÄ£Äâµ÷ÖÆÆ÷µÄÔöÒæ¿É±à³ÌרÓÃÇ°¶Ë¡£Æ¬ÄÚÊý×ÖÂ˲¨Æ÷´¦Àíµ÷ÖÆÆ÷µÄÊä³öÐźš£Í¨¹ýƬÄÚ¿ØÖƼĴæÆ÷¿Éµ÷½ÚÂ˲¨Æ÷µÄ½ØÖ¹µãºÍÊä³ö¸üÐÂËÙÂÊ£¬´Ó¶ø¶ÔÊý×ÖÂ˲¨Æ÷µÄµÚÒ»¸öÏݲ¨½øÐбà³Ì¡£AD7705/7706Ö»Ðè2.7~3.3V»ò4.75~5.25Vµ¥µçÔ´¡£AD7705ÊÇ˫ͨµÀÈ«²î·ÖÄ£ÄâÊäÈ룬¶øAD7706ÊÇ3ͨµÀα²î·ÖÄ£ÄâÊäÈ룬¶þÕ߶¼ÓÐÒ»¸ö²î·Ö»ù×¼ÊäÈë¡£µ±µçÔ´µçѹΪ5V¡¢»ù×¼µçѹΪ2.5Vʱ£¬Õâ¶þÖÖÆ÷¼þ¶¼¿É½«ÊäÈëÐźŷ¶Î§´Ó0~+20mVµ½0~+2.5VµÄÐźŽøÐд¦Àí¡£»¹¿É´¦Àí¡À20mV~¡À2.5VµÄË«¼«ÐÔÊäÈëÐźţ¬¶ÔÓÚAD7705ÊÇÒÔAIN£¨-£©ÊäÈë¶ËΪ²Î¿¼µã£¬¶øAD7706ÊÇCOMMONÊäÈë¶Ë¡£µ±µçÔ´µçѹΪ3V¡¢»ù×¼µçѹΪ1.225Vʱ£¬¿É´¦Àí0~+10mVµ½0~+1.225VµÄµ¥¼«ÐÔÊäÈëÐźţ¬ËüµÄË«¼«ÐÔÊäÈëÐźŷ¶Î§ÊÇ¡À10mVµ½¡À1.225V¡£Òò´Ë£¬AD7705/7706¿ÉÒÔʵÏÖ2/3ͨµÀϵͳËùÓÐÐźŵĵ÷ÀíºÍת»»¡£AD7705/7706ÊÇÓÃÓÚÖÇÄÜϵͳ¡¢Î¢¿ØÖÆÆ÷ϵͳºÍ»ùÓÚDSPϵͳµÄÀíÏë²úÆ·¡£Æä´®ÐнӿڿÉÅäÖÃΪÈýÏß½Ó¿Ú¡£ÔöÒæÖµ¡¢Ðźż«ÐÔÒÔ¼°¸üÐÂËÙÂʵÄÑ¡Ôñ¿ÉÓô®ÐÐÊäÈë¿ÚÓÉÈí¼þÀ´ÅäÖ᣸ÃÆ÷¼þ»¹°üÀ¨×ÔУ׼ºÍϵͳУ׼ѡÏÒÔÏû³ýÆ÷¼þ±¾Éí»òϵͳµÄÔöÒæºÍÆ«ÒÆÎó²î¡£CMOS½á¹¹È·±£Æ÷¼þ¾ßÓм«µÍ¹¦ºÄ£¬µôµçģʽ¼õÉٵȴýʱµÄ¹¦ºÄÖÁ20¦ÌW£¨µäÐÍÖµ£©¡£AD7705/7706²ÉÓÃ16½Å0.3Ó¢´ç¿í£¬ËÜÁÏË«ÁÐÖ±²å£¨DIP£©ºÍ16½Å¿íÌ壨0.3Ó¢´ç£©SOIC·â×°ºÍ16½ÅTSSOP·â×°¡£1.2ÌصãlAD7705£º2¸öÈ«²î·ÖÊäÈëͨµÀµÄADClAD7706£º3¸öα²î·ÖÊäÈëͨµÀµÄADC16λÎÞ¶ªÊ§´úÂë0.003%·ÇÏßÐÔl¿É±à³ÌÔöÒæÇ°¶ËÔöÒ棺1~128lÈýÏß´®ÐнӿÚSPITM¡¢QSPITM¡¢MICROWIRETMºÍDSP¼æÈÝlÓжÔÄ£ÄâÊäÈ뻺³åµÄÄÜÁ¦l2.7¡«3.3V»ò4.75¡«5.25V¹¤×÷µçѹl3Vµçѹʱ£¬×î´ó¹¦ºÄΪ1mWlµÈ´ýµçÁ÷µÄ×î´óֵΪ8¦ÌAl16½ÅDIP¡¢SOICºÍTSSOP·â×°==99-10-14==P&SÎ人Á¦Ô´µç×ӹɷÝÓÐÏÞ¹«Ë¾==35-2==P&SÎ人Á¦Ô´µç×ӹɷÝÓÐÏÞ¹«Ë¾µØÖ·:ºþ±±Î人ÊÐ׿µ¶ÈªÂ·15ºÅÐÅÏä:Î人ÊÐ70020ÐÅÏäÓʱà:430079µç»°:(86)(027£©87493500¡«87493506´«Õæ:(86)(027)87491166,87493497P&SÍøÍøÖ·:http://www.p8s.com1.3¹¦ÄÜ·½¿òͼVDDREFIN()REFIN(+)AD7705/AD7706MAXPGABUFFERCHARGEBALANCINGA/DCONVERTERMODULATORDIGITALFILTERA=1128SERIALINTERFACEREGISTERBANKCLOCKGENERATIONMCLKINMCLKOUTGNDDINDOUTDRDYRESETSCLKCSANALOGINPUTCHANNELS1.4Òý½ÅÅÅÁÐÓ빦ÄÜ1.4.1AD7705ºÍAD7706µÄÒý½ÅÅÅÁÐÒý½ÅÅÅÁÐÈçÏÂͼTOPVIEW(NottoScale)16151413121110912345678SCLKMCLKINMCLKOUTAIN2(+)AIN1(+)AIN1()GNDVDDDINDOUTDRDYDRDYAIN2()REFRESETRESETIN()REFIN(+)AD7705TOPVIEW(NottoScale)16151413121110912345678SCLKMCLKINMCLKOUTAIN1AIN2COMMONGNDVDDDINDOUTAIN3REFIN()REFIN(+)AD7706CSCS1.4.2Òý½Å¹¦ÄÜÒý½Å¹¦Äܱí==99-10-14==P&SÎ人Á¦Ô´µç×ӹɷÝÓÐÏÞ¹«Ë¾==35-3==P&SÎ人Á¦Ô´µç×ӹɷÝÓÐÏÞ¹«Ë¾µØÖ·:ºþ±±Î人ÊÐ׿µ¶ÈªÂ·15ºÅÐÅÏä:Î人ÊÐ70020ÐÅÏäÓʱà:430079µç»°:(86)(027£©87493500¡«87493506´«Õæ:(86)(027)87491166,87493497P&SÍøÍøÖ·:http://www.p8s.com±àºÅÃû³Æ¹¦ÄÜ1SCLK´®ÐÐʱÖÓ£¬Ê©ÃÜÌØÂß¼­ÊäÈë¡£½«Ò»¸öÍⲿµÄ´®ÐÐʱÖÓ¼ÓÓÚÕâÒ»ÊäÈë¶Ë¿Ú£¬ÒÔ·ÃÎÊAD7705/AD7706µÄ´®ÐÐÊý¾Ý¡£¸Ã´®ÐÐʱÖÓ¿ÉÒÔÊÇÁ¬ÐøʱÖÓÒÔÁ¬ÐøµÄÂö³å´®´«ËÍËùÓÐÊý¾Ý¡£·´Ö®£¬ËüÒ²¿ÉÒÔÊÇ·ÇÁ¬ÐøʱÖÓ£¬½«ÐÅÏ¢ÒÔСÅúÐÍÊý¾Ý·¢Ë͸øADD7705/77062MCLKINΪת»»Æ÷ÌṩÖ÷ʱÖÓÐźš£ÄÜÒÔ¾§Ìå/гÕñÆ÷»òÍⲿʱÖÓµÄÐÎʽÌṩ¡£¾§Ìå/гÕñÆ÷¿ÉÒÔ½ÓÔÚMCLKINºÍMCLKOUT¶þÒý½ÅÖ®¼ä¡£´ËÍ⣬MCLKINÒ²¿ÉÓÃCMOS¼æÈݵÄʱÖÓÇý¶¯£¬¶øMCLKOUT²»Á¬½Ó¡£Ê±ÖÓƵÂʵķ¶Î§Îª500kHz~5MHz3MCLKOUTµ±Ö÷ʱÖÓΪ¾§Ìå/гÕñÆ÷ʱ£¬¾§Ìå/гÕñÆ÷±»½ÓÔÚMCLKINºÍMCLKOUTÖ®¼ä¡£Èç¹ûÔÚMCLKINÒý½Å´¦½ÓÉÏÒ»¸öÍⲿʱÖÓ£¬MCLKOUT½«Ìṩһ¸ö·´ÏàʱÖÓÐźš£Õâ¸öʱÖÓ¿ÉÒÔÓÃÀ´ÎªÍⲿµç·ÌṩʱÖÓÔ´£¬ÇÒ¿ÉÒÔÇý¶¯Ò»¸öCMOS¸ºÔØ¡£Èç¹ûÓû§²»ÐèÒª£¬MCLKOUT¿ÉÒÔͨ¹ýʱÖӼĴæÆ÷ÖеÄCLKDISλ¹Øµô¡£ÕâÑù£¬Æ÷¼þ²»»áÔÚMCLKOUT½ÅÉÏÇý¶¯µçÈݸºÔضøÏûºÄ²»±ØÒªµÄ¹¦ÂÊ4CSƬѡ£¬µÍµçƽÓÐЧµÄÂß¼­ÊäÈ룬ѡÔñAD7705/AD7706¡£½«¸ÃÒý½Å½ÓΪµÍµçƽ£¬AD7705/AD7706ÄÜÒÔÈýÏß½Ó¿ÚģʽÔËÐУ¨ÒÔSCLK¡¢DINºÍDOUTÓëÆ÷¼þ½Ó¿Ú£©¡£ÔÚ´®ÐÐ×ÜÏßÉÏ´øÓжà¸öÆ÷¼þµÄϵͳÖУ¬¿ÉÓÉCS¶ÔÕâЩÆ÷¼þ×÷³öÑ¡Ôñ£¬»òÔÚÓëAD7705/AD7706ͨÐÅʱ£¬CS¿ÉÓÃ×÷֡ͬ²½ÐźÅ5RESET¸´Î»ÊäÈë¡£µÍµçƽÓÐЧµÄÊäÈ룬½«Æ÷¼þµÄ¿ØÖÆÂß¼­¡¢½Ó¿ÚÂß¼­¡¢Ð£×¼ÏµÊý¡¢Êý×ÖÂ˲¨Æ÷ºÍÄ£Äâµ÷ÖÆÆ÷¸´Î»ÖÁÉϵç״̬6AIN2(+)[AIN1]¶ÔÓÚAD7705£¬²î·ÖÄ£ÄâÊäÈëͨµÀ2µÄÕýÊäÈë¶Ë¡£¶ÔÓÚAD7706£¬Ä£ÄâÊäÈëͨµÀ1µÄÊäÈë¶Ë7AIN1(+)[AIN2]¶ÔÓÚAD7705£¬²î·ÖÄ£ÄâÊäÈëͨµÀ1µÄÕýÊäÈë¶Ë£»¶ÔÓÚAD7706£¬Ä£ÄâÊäÈëͨµÀ2µÄÊäÈë¶Ë8AIN1(-)[COMMON]¶&