{"id":1148,"date":"2018-09-29T03:10:27","date_gmt":"2018-09-29T03:10:27","guid":{"rendered":""},"modified":"2018-09-29T11:11:00","modified_gmt":"2018-09-29T03:11:00","slug":"%e4%b8%80%e6%ac%be%e7%94%a8%e4%ba%8e%e5%9f%ba%e5%87%86%e7%94%b5%e5%8e%8b%e6%ba%90%e7%9a%84%e4%bd%8e%e6%bc%82%e7%a7%bb%e7%a8%b3%e5%8e%8b%e5%99%a8%e6%80%a7%e8%83%bd%e8%ae%b2%e8%a7%a3","status":"publish","type":"post","link":"http:\/\/www.szryc.com\/?p=1148","title":{"rendered":"\u4e00\u6b3e\u7528\u4e8e\u57fa\u51c6\u7535\u538b\u6e90\u7684\u4f4e\u6f02\u79fb\u7a33\u538b\u5668\u6027\u80fd\u8bb2\u89e3"},"content":{"rendered":"
\n\t\u57fa\u51c6\u7535\u538b\u6e90\u662f\u7cbe\u5bc6\u7684\u6a21\u62df\u96c6\u6210\u7535\u8def\uff0c\u60a8\u65e0\u6cd5\uff08\u6216\u8005\u8bf4\u5f88\u96be\uff09\u4ece\u57fa\u51c6\u7535\u538b\u6e90\u83b7\u53d6\u7535\u6d41<\/u>\u3002\u5982\u679c\u60a8\u9700\u8981\u7cbe\u5bc6\u7535\u538b\u548c\u5c11\u91cf\u7535\u6d41\uff0c\u5219\u9700\u8981\u4e00\u4e2a\u5e26\u6709\u5916\u90e8\u5143\u4ef6\u7684\u5916\u90e8 LDO<\/u> \u4ee5\u53ca PCB \u7a7a\u95f4\u3002<\/p>\n
\n\tRefulator™ \u63d0\u4f9b\u4e86\u4e00\u79cd\u89e3\u51b3\u65b9\u6848\uff0c\u8fd9\u662f\u4e00\u79cd\u80fd\u591f\u9a71\u52a8\u7535\u6d41\u7684\u9ad8\u7cbe\u5ea6\u57fa\u51c6\u7535\u538b\u6e90\u3002\u4eca\u5929\u5c31\u7531 ADI<\/u> \u7684\u8d44\u6df1\u8bbe\u8ba1\u5de5\u7a0b\u5e08 Michael Anders<\/u>on\uff08\u4ed6\u62e5\u670916\u9879\u4e13\u5229\uff09\u4e3a\u5927\u5bb6\u4ecb\u7ecd\u91c7\u7528 Refulator \u7684\u4f18\u70b9\u5427~<\/p>\n \n\tLT6658——\u57fa\u51c6\u7535\u538b\u6e90\u8d28\u91cf\u7684\u4f4e\u6f02\u79fb\u7a33\u538b\u5668<\/p>\n \n\tLT6658\u662f\u4e00\u6b3e\u7cbe\u5bc6\u4f4e\u566a\u58f0\u3001\u4f4e\u6f02\u79fb\u7a33\u538b\u5668\uff0c\u5177\u6709\u4e13\u7528\u57fa\u51c6\u7535\u538b\u6e90\u7684\u7cbe\u5ea6\u89c4\u683c\u548c\u7ebf\u6027\u7a33\u538b\u5668<\/u>\u7684\u529f\u7387\u80fd\u529b——\u4e8c\u8005\u7684\u4f18\u70b9\u7ed3\u5408\u4e3aADI \u7684 Refulator\u6280\u672f\u3002LT6658\u7684\u6f02\u79fb\u4e3a10 ppm \/°C\uff0c\u521d\u59cb\u7cbe\u5ea6\u4e3a0.05%\uff0c\u4e24\u8def\u8f93\u51fa\u5206\u522b\u652f\u6301150 mA\u548c50 mA\uff0c\u6bcf\u8def\u8f93\u51fa\u5747\u670920 mA\u7684\u6709\u6e90\u5438\u7535\u6d41\u80fd\u529b\u3002\u4e3a\u4e86\u4fdd\u6301\u9ad8\u7cbe\u5ea6\uff0c\u8d1f\u8f7d\u8c03\u6574\u7387\u4e3a0.1 ppm\/mA\u3002\u5f53\u8f93\u5165\u7535\u538b\u6e90\u5f15\u811a\u8fde\u63a5\u5728\u4e00\u8d77\u65f6\uff0c\u7535\u538b\u8c03\u6574\u7387\u5178\u578b\u503c\u4e3a1.4 ppm\/V\uff0c\u800c\u5f53\u4e3a\u8f93\u5165\u5f15\u811a\u63d0\u4f9b\u72ec\u7acb\u7535\u6e90\u65f6\uff0c\u7535\u538b\u8c03\u6574\u7387\u5c0f\u4e8e0.1 ppm\/V\u3002<\/p>\n \n\t\u4e3a\u4e86\u66f4\u597d\u5730\u7406\u89e3LT6658\u7684\u7279\u6027\u4ee5\u53ca\u5b83\u5982\u4f55\u8fbe\u5230\u5982\u6b64\u9ad8\u7684\u6027\u80fd\u6c34\u5e73\uff0c\u56fe1\u663e\u793a\u4e86\u4e00\u4e2a\u5178\u578b\u5e94\u7528\u3002LT6658\u7531\u4e00\u4e2a\u57fa\u51c6\u7535\u538b\u7ea7\u3001\u4e00\u4e2a\u964d\u566a\u7ea7\u548c\u4e24\u4e2a\u8f93\u51fa\u7f13\u51b2\u5668\u7ec4\u6210\u3002\u57fa\u51c6\u7535\u538b\u548c\u4e24\u4e2a\u8f93\u51fa\u7f13\u51b2\u5668\u5206\u5f00\u4f9b\u7535\uff0c\u4ee5\u5b9e\u73b0\u4f18\u5f02\u7684\u9694\u79bb\u3002\u6bcf\u4e2a\u8f93\u51fa\u7f13\u51b2\u5668\u90fd\u6709\u4e00\u4e2a\u5f00\u5c14\u6587\u68c0\u6d4b\u53cd\u9988\u5f15\u811a\uff0c\u4ee5\u63d0\u4f9b\u6700\u4f73\u8d1f\u8f7d\u8c03\u6574\u3002<\/p>\n \n\t<\/p>\n \n\t\u56fe1. \u5178\u578b\u5e94\u7528<\/p>\n \n\t\u964d\u566a\u7ea7\u7531\u4e00\u4e2a400 Ω\u7535\u963b\u548c\u4e00\u4e2a\u7528\u4e8e\u8fde\u63a5\u5916\u90e8\u7535\u5bb9<\/u>\u7684\u5f15\u811a\u7ec4\u6210\u3002\u8be5RC\u7f51\u7edc\u5145\u5f53\u4f4e\u901a\u6ee4\u6ce2\u5668<\/u>\uff0c\u7528\u6765\u9650\u5236\u57fa\u51c6\u7535\u538b\u7ea7\u7684\u566a\u58f0\u5e26\u5bbd\u3002\u5916\u90e8\u7535\u5bb9\u53ef\u4ee5\u4efb\u610f\u5927\uff0c\u4ee5\u4fbf\u5c06\u566a\u58f0\u5e26\u5bbd\u964d\u81f3\u975e\u5e38\u4f4e\u7684\u9891\u7387\u3002<\/p>\n \n\t\u5feb\u901f\u5b89\u9759\u7684\u8d1f\u8f7d\u9636\u8dc3\u54cd\u5e94<\/p>\n \n\t\u4f5c\u4e3a\u7a33\u538b\u5668\uff0cLT6658\u4eceVOUT1_F\u5f15\u811a\u63d0\u4f9b150 mA\u7535\u6d41\uff0c\u5e76\u5177\u6709\u51fa\u8272\u7684\u77ac\u6001\u54cd\u5e94\u6027\u80fd\u3002\u56fe2a\u663e\u793a\u4e86\u5668\u4ef6\u5bf91 mA\u8d1f\u8f7d\u9636\u8dc3\u77ac\u6001\uff08\u4ece10 mA\u523011 mA\uff09\u7684\u54cd\u5e94\uff1b\u56fe2b\u663e\u793a\u4e86\u5668\u4ef6\u5bf9140 mA\u8d1f\u8f7d\u9636\u8dc3\u77ac\u6001\uff08\u4ece10 mA\u5230150 mA\uff09\u7684\u54cd\u5e94\u3002\u8f93\u51fa\u7f13\u51b2\u5668\u7684\u51fa\u7535\u6d41\u548c\u5438\u7535\u6d41\u80fd\u529b\u652f\u6301\u8f93\u51fa\u5feb\u901f\u5efa\u7acb\u3002\u77ac\u6001\u54cd\u5e94\u65f6\u95f4\u5f88\u77ed\uff0c\u540c\u65f6\u4fdd\u6301\u51fa\u8272\u7684\u8d1f\u8f7d\u8c03\u6574\u3002\u8d1f\u8f7d\u8c03\u6574\u7387\u5178\u578b\u503c\u4e3a0.1 ppm\/mA\u3002\u7b2c\u4e8c\u8def\u8f93\u51faVOUT2_F\u5177\u6709\u7c7b\u4f3c\u7684\u54cd\u5e94\u6027\u80fd\uff0c\u6700\u5927\u8d1f\u8f7d\u4e3a50 mA\u3002<\/p>\n \n\t<\/p>\n \n\t\u56fe2a. 1 mA\u8d1f\u8f7d\u9636\u8dc3\u54cd\u5e94<\/p>\n \n\t<\/p>\n \n\t\u56fe2b. 140 mA\u8d1f\u8f7d\u9636\u8dc3\u54cd\u5e94<\/p>\n \n\t\u8f93\u51fa\u8ddf\u8e2a<\/p>\n \n\t\u5bf9\u4e8e\u4f7f\u7528\u4e0d\u540c\u57fa\u51c6\u7535\u538b\u7684\u591a\u8f6c\u6362\u5668\u5e94\u7528\uff0c\u5373\u4f7f\u8f93\u51fa\u8bbe\u7f6e\u4e3a\u4e0d\u540c\u7684\u7535\u538b\uff0cLT6658\u7684\u8f93\u51fa\u4e5f\u4f1a\u8ddf\u8e2a\uff0c\u786e\u4fdd\u8f6c\u6362\u7ed3\u679c\u4e00\u81f4\u3002\u8fd9\u4e4b\u6240\u4ee5\u53ef\u80fd\uff0c\u662f\u56e0\u4e3aLT6658\u7684\u4e24\u8def\u8f93\u51fa\u7531\u4e00\u4e2a\u516c\u5171\u7535\u538b\u6e90\u9a71\u52a8\u3002\u8f93\u51fa\u7f13\u51b2\u5668\u7ecf\u8c03\u6574\uff0c\u5b9e\u73b0\u51fa\u8272\u7684\u8ddf\u8e2a\u548c\u4f4e\u6f02\u79fb\u3002\u5f53VOUT1_F\u4e0a\u7684\u8d1f\u8f7d\u4ece0 mA\u589e\u52a0\u5230150 mA\u65f6\uff0cVOUT2\u8f93\u51fa\u53d8\u5316\u5c0f\u4e8e12 ppm\uff0c\u5982\u56fe3\u6240\u793a\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5373\u4f7f\u8d1f\u8f7d\u548c\u5de5\u4f5c\u6761\u4ef6\u6539\u53d8\uff0c\u8f93\u51fa\u4e4b\u95f4\u7684\u5173\u7cfb\u4e5f\u80fd\u5f97\u5230\u5f88\u597d\u5730\u4fdd\u6301\u3002<\/p>\n \n\t<\/p>\n \n\t\u56fe3. \u901a\u9053\u95f4\u7684\u8d1f\u8f7d\u8c03\u6574\uff08\u5df2\u6d88\u9664\u53d1\u70ed\u5f71\u54cd\uff09<\/p>\n \n\t\u7535\u6e90\u6291\u5236\u548c\u9694\u79bb<\/p>\n \n\t\u65e0\u8bba\u662f\u7528\u6237\u901a\u8fc7\u62cd\u7167\u4e0a\u4f20\u7684\u5185\u5bb9\u3001\u81ea\u5b9a\u4e49\u5934\u50cf\uff0c\u8fd8\u662f\u6587\u7ae0\u8bc4\u8bba\u7684\u56fe\u7247\uff0c\u56fe\u7247\u667a\u80fd\u9274\u9ec4\u63a5\u53e3\u90fd\u80fd\u591f\u8fdb\u884c\u4e3b\u52a8\u8bc6\u522b\u53ca\u83b7\u53d6\u8272\u60c5\u91cf\u5316\u7a0b\u5ea6\u4fe1\u606f\uff0c\u5b9e\u73b0\u7cbe\u51c6\u5feb\u901f\u7684\u8272\u60c5\u503e\u5411\u5224\u65ad\u3002<\/p>\n \n\t\u4e3a\u4e86\u5e2e\u52a9\u5b9e\u73b0\u51fa\u8272\u7684\u7535\u6e90\u6291\u5236\u548c\u8f93\u51fa\u9694\u79bb\uff0cLT6658\u63d0\u4f9b\u4e09\u4e2a\u7535\u6e90\u5f15\u811a\u3002VIN\u5f15\u811a\u4e3a\u57fa\u51c6\u7535\u538b\u7535\u8def\u4f9b\u7535\uff0c\u800cVIN1\u548cVIN2\u5206\u522b\u4e3aVOUT1\u548cVOUT2\u4f9b\u7535\u3002\u6700\u7b80\u5355\u7684\u65b9\u6cd5\u662f\u5c06\u6240\u6709\u4e09\u4e2a\u7535\u6e90\u5f15\u811a\u8fde\u63a5\u5728\u4e00\u8d77\uff0c\u63d0\u4f9b1.4 ppm\/V\u7684\u5178\u578b\u76f4\u6d41\u7535\u6e90\u6291\u5236\u80fd\u529b\u3002\u5f53\u7535\u6e90\u5f15\u811a\u5206\u522b\u8fde\u63a5\u4e14VIN1\u7535\u6e90\u5207\u6362\u65f6\uff0cVOUT2\u7684\u76f4\u6d41\u7535\u538b\u8c03\u6574\u7387\u4e3a0.06 ppm\/V\u3002<\/p>\n \n\t\u88681\u603b\u7ed3\u4e86\u6bcf\u4e2a\u7535\u6e90\u5f15\u811a\u4ece5 V\u53d8\u4e3a36 V\u65f6\u7684\u7535\u6e90\u6291\u5236\u60c5\u51b5\u3002VIN\u7535\u6e90\u7684\u7075\u654f\u5ea6\u6700\u9ad8\uff0c\u5f15\u8d77\u7684\u8f93\u51fa\u5178\u578b\u53d8\u5316\u4e3a1.4 ppm\/V\u3002\u7535\u6e90\u5f15\u811aVIN1\u548cVIN2\u51e0\u4e4e\u65e0\u5f71\u54cd\u3002VIN1\u548cVIN2\u680f\u4e2d\u7684\u6d4b\u91cf\u7ed3\u679c\u662f\u8f93\u51fa\u566a\u58f0\u7535\u5e73\u3002<\/p>\n \n\tTable 1. DC Power Supply Rejecti<\/u>on<\/p>\n \n\t<\/p>\n \n\t\u88684\u6240\u793a\u4e3a\u4ea4\u6d41PSRR\u7684\u4e24\u4e2a\u4f8b\u5b50\u3002\u7b2c\u4e00\u4e2a\u4f8b\u5b50\u5728NR\u5f15\u811a\u4e0a\u6709\u4e00\u4e2a1 μF\u7535\u5bb9\uff0c\u7b2c\u4e8c\u4e2a\u4f8b\u5b50\u5728NR\u5f15\u811a\u4e0a\u6709\u4e00\u4e2a10 μF\u7535\u5bb9\u3002\u8f83\u5927\u768410 μF\u7535\u5bb9\u5c06107 dB\u6291\u5236\u80fd\u529b\u6269\u5c55\u52302 kHz\u3002<\/p>\n \n\t<\/p>\n \n\t\u56fe4. \u7535\u6e90\u7eb9\u6ce2\u6291\u5236<\/p>\n \n\t\u56fe5\u663e\u793a\u4e86\u4eceVIN1\u5230VOUT2\u7684\u4ea4\u6d41\u901a\u9053\u95f4\u7535\u6e90\u9694\u79bb\u3002\u5f53CNR = 10 μF\u65f6\uff0c100 kHz\u4ee5\u4e0a\u9891\u7387\u7684\u901a\u9053\u95f4\u7535\u6e90\u9694\u79bb\u5927\u4e8e70 dB\u3002<\/p>\n \n\t<\/p>\n \n\t\u56fe5. \u901a\u9053\u95f4VOUT1\u81f3VOUT2\u9694\u79bb<\/p>\n \n\t\u8d1f\u8f7d\u77ac\u53d8\u5bf9\u76f8\u90bb\u8f93\u51fa\u7684\u5f71\u54cd\u6781\u5c0f\u3002\u56fe6a\u548c\u56fe6b\u663e\u793a\u4e86\u901a\u9053\u95f4\u8f93\u51fa\u9694\u79bb\u3002\u5728\u4e00\u8def\u8f93\u51fa\u4ee550 mV rms\u6446\u52a8\u7684\u540c\u65f6\uff0c\u7ed8\u5236\u53e6\u4e00\u8def\u8f93\u51fa\u7684\u53d8\u5316\u3002<\/p>\n \n\t<\/p>\n \n\t\u56fe6a. \u901a\u9053\u95f4VOUT1\u81f3VOUT2\u8d1f\u8f7d\u8c03\u6574\u7387<\/p>\n \n\t<\/p>\n \n\t\u56fe6b. \u901a\u9053\u95f4VOUT2\u81f3VOUT1\u8d1f\u8f7d\u8c03\u6574\u7387<\/p>\n \n\t\u4f7f\u7528\u56fe7\u6240\u793a\u7535\u8def\u53ef\u4ee5\u5b9e\u73b0\u975e\u51e1\u7684\u4ea4\u6d41PSRR\u3002VOUT1\u8f93\u51fa\u5f15\u5bfc\u7535\u6e90VIN\u548cVIN2\uff0c\u4ea7\u751f\u4e00\u4e2a\u9012\u5f52\u57fa\u51c6\u7535\u538b\u6e90\u3002<\/p>\n \n\t<\/p>\n \n\t\u56fe7a. \u9012\u5f52\u57fa\u51c6\u7535\u538b\u6e90\u89e3\u51b3\u65b9\u6848\uff08VOUT1\u4e3aVIN\u548cVIN2\u4f9b\u7535\uff09<\/p>\n \n\t<\/p>\n \n\t\u56fe7b. \u9012\u5f52\u57fa\u51c6\u7535\u538b\u6e90\u7535\u8def\u7684\u4ea4\u6d41PSSR<\/p>\n \n\t\u7535\u6e90\u7ba1\u7406<\/u>\u548c\u4fdd\u62a4<\/p>\n \n\t\u4e09\u4e2a\u7535\u6e90\u5f15\u811a\u6709\u52a9\u4e8e\u7ba1\u7406\u5c01\u88c5\u7684\u529f\u8017\u3002\u5f53\u63d0\u4f9b\u5927\u7535\u6d41\u65f6\uff0c\u5e94\u964d\u4f4e\u7535\u6e90\u7535\u538b\uff0c\u4ee5\u5c3d\u91cf\u51cf\u5c11LT6658\u7684\u529f\u8017\u3002\u8f93\u51fa\u5668\u4ef6\u4e0a\u51fa\u73b0\u7684\u7535\u538b\u4f1a\u8f83\u5c0f\uff0c\u4ece\u800c\u964d\u4f4e\u529f\u8017\u5e76\u63d0\u9ad8\u6548\u7387\u3002<\/p>\n 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