½üÆÚ£¬Óиö¿Í»§µÄ²úÆ·ÊÇÒÆ¶¯µçÔ´£¬ÆäÔÚµç·ÉÏʹÓÃÁ½¿ÅÆÕͨºñĤµçÁ÷¼ì²âµç×èRR3216 (1206)LR015FT²¢ÁªÀ´ÊµÏÖ¼ì²âµçÁ÷µÄ¹¦ÄÜ¡£
¹ýÓë¿Í»§¹¤³ÌʦA¾ý¹µÍ¨Á˽⵽£ºÔÚµç·ʵ¼Ê¹¤×÷Öлá³öÏÖ¸ö±ðµçÁ÷¼ì²â²»×¼£¬µ¼ÖÂÏÔʾÊä³öµçÁ¿²»×¼È·£¬¶øÇÒÓÐʱҲ»áÓеç×èÉÕ»ÙµÄÏÖÏó(ͨµçºóµç·°åµÄζÈÓÐ75¡æ×óÓÒ)£¬¾ßÌåÔÒò²»Ã÷¡£
Ê×ÏÈ·ÖÎöһϿͻ§µç·ÉϵÄʵ¼ÊÇé¿ö£º
Á½¿ÅÆÕͨºñĤµçÁ÷¼ì²âµç×èRR3216 (1206)LR015FT (×èÖµ£º15m¦¸ ¾«¶È£ºF=¡À1% ¹¦ÂÊ£º1/4W ÎÂÆ¯£º1500PPM) ²¢Áª£¬Æä²¢Áªµç×èÓ빦ÂÊ£º
R×Ü=R1*R2/(R1+R2) =(15*15)/(15+15)=225/30=7.5m¦¸
P×Ü=P1+P2=1/4+1/4=1/2W
µ±Î¶ÈÉÏÉýµ½75¡æÊ±£¬Î¶ȵı仯¡÷C=75¡æ-25¡æ=50¡æ£¬×èÖµµÄ±ä»¯ÂÊ£º50*(1500*10-6)/7.5=1%¡£ËùÒÔ£¬ÔÚµç·ʵ¼Ê¹¤×÷Öв¢Áªµç×èµÄʵ¼Ê¾«¶ÈΪ2%¡£
¸ù¾ÝÉÏÊö¼ÆË㣬µçÁ÷¼ì²â²»×¼Óë²¢Áªµç×è×èֵƫ²î½Ï´óÓйأ¬¸ö±ðµç×èÉÕ»Ù¸úµç×蹦ÂʽϵÍ(µ¥¸öµç×蹦ÂÊΪ1/4W)Óйء£
ΪÁ˽â¾öÉÏÊö²»Á¼ÏÖÏó£¬ÎÒÃÇÍÆ¼öÓÃÒ»¿Å MRF3216(1206)LR007FUÌùƬºÏ½ðµç×èÌæ´úÁ½¿ÅRR3216 (1206)LR015FTÌùƬÆÕͨºñĤµçÁ÷¼ì²âµç×裺
ºÏ½ðµç×èMRF3216(1206)LR007FU (×èÖµ£º7m¦¸ ¾«¶È£ºF=¡À1% ¹¦ÂÊ£º1/2W ÎÂÆ¯£º75PPM)
ζÈÉÏÉýµ½75¡æÊ±£¬Î¶ȵı仯¡÷C=75¡æ-25¡æ=50¡æ£¬×èÖµµÄ±ä»¯ÂÊ£º50*(75*10-6)/7.5=0.05%
ÔÚµç·ʵ¼Ê¹¤×÷Öв¢Áªµç×èµÄʵ¼Ê¾«¶ÈΪ-0.95%~1.05% ¡£
×ÛºÏÉÏÊöÊý¾Ý£¬ÓúϽðµç×èÌæ´úÆÕͨºñĤµçÁ÷¼ì²âµç×èµÄÓÅÊÆ£º¹¦ÂÊ´ó¡¢Î¶ÈϵÊýºÃ¡¢½ÚÊ¡Ïß·°å¿Õ¼ä¡¢½ÚÊ¡Îý¸àÓÃÁ¿¡¢SMTЧÂʸߡ£
ÐÅÏ¢°æÈ¨¹éÉîÛÚÊÐÃÀ¡µç×ÓÓÐÏÞ¹«Ë¾ËùÓÐ:δ¾Í¬Ò⣬½ûÖ¹×ªÔØ¡£