{"id":15157,"date":"2025-05-22T12:17:48","date_gmt":"2025-05-22T12:17:48","guid":{"rendered":"https:\/\/sistc.com\/?p=15157"},"modified":"2025-05-22T12:17:49","modified_gmt":"2025-05-22T12:17:49","slug":"what-is-the-digital-output-of-a-mems-microphone","status":"publish","type":"post","link":"https:\/\/sistc.com\/zh\/what-is-the-digital-output-of-a-mems-microphone\/","title":{"rendered":"\u4ec0\u4e48\u662f MEMS \u9ea6\u514b\u98ce\u7684\u6570\u5b57\u8f93\u51fa\uff1f"},"content":{"rendered":"<p>\u5728\u73b0\u4ee3\u97f3\u9891\u7cfb\u7edf\u8bbe\u8ba1\u4e2d\uff0cMEMS\uff08\u5fae\u673a\u7535\u7cfb\u7edf\uff09\u9ea6\u514b\u98ce\u56e0\u5176\u4f53\u79ef\u5c0f\u3001\u529f\u8017\u4f4e\u3001\u6027\u80fd\u5f3a\u800c\u5728\u5f88\u5927\u7a0b\u5ea6\u4e0a\u53d6\u4ee3\u4e86\u4f20\u7edf\u7684\u6a21\u62df\u9ea6\u514b\u98ce\u3002\u5b83\u4eec\u7684\u6700\u5927\u4f18\u52bf\u4e4b\u4e00\u662f <strong>\u6570\u5b57\u8f93\u51fa<\/strong>\u8fd9\u4e0d\u4ec5\u7b80\u5316\u4e86\u96c6\u6210\uff0c\u8fd8\u63d0\u9ad8\u4e86\u6297\u566a\u80fd\u529b\u3002\u5728\u672c\u6587\u4e2d\uff0c\u6211\u4eec\u5c06\u63a2\u8ba8 MEMS \u9ea6\u514b\u98ce\u6700\u5e38\u7528\u7684\u4e24\u79cd\u6570\u5b57\u63a5\u53e3\uff0c\u6bd4\u8f83\u5b83\u4eec\u7684\u7279\u6027\uff0c\u5e76\u4ecb\u7ecd\u5982\u4f55\u4e3a\u60a8\u7684\u5e94\u7528\u9009\u62e9\u6b63\u786e\u7684\u683c\u5f0f\u3002<\/p><figure class=\"wp-block-image aligncenter size-large is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/sistc.com\/wp-content\/uploads\/2025\/05\/IMG_9229-1024x1024.jpg\" alt=\"\" class=\"wp-image-15158\" style=\"width:231px;height:auto\" srcset=\"https:\/\/sistc.com\/wp-content\/uploads\/2025\/05\/IMG_9229-1024x1024.jpg 1024w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/05\/IMG_9229-300x300.jpg 300w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/05\/IMG_9229-100x100.jpg 100w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/05\/IMG_9229-768x768.jpg 768w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/05\/IMG_9229-1536x1536.jpg 1536w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/05\/IMG_9229-2048x2048.jpg 2048w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/05\/IMG_9229-12x12.jpg 12w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/05\/IMG_9229-600x600.jpg 600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\"><a href=\"https:\/\/sistc.com\/zh\/product\/digital-mems-microphone\/\">\u6570\u5b57 MEMS \u9ea6\u514b\u98ce<\/a><\/figcaption><\/figure><h2 class=\"wp-block-heading\">1.\u6570\u5b57\u8f93\u51fa\u4e3a\u4f55\u91cd\u8981<\/h2><p>\u6a21\u62df\u9ea6\u514b\u98ce\u8f93\u51fa\u7684\u53ef\u53d8\u7535\u538b\u5fc5\u987b\u7ecf\u8fc7\u6297\u6df7\u53e0\u6ee4\u6ce2\u5668\u548c\u5916\u90e8\u6a21\u6570\u8f6c\u6362\u5668\uff08ADC\uff09\uff0c\u800c\u6570\u5b57 MEMS \u9ea6\u514b\u98ce\u5219\u4e0d\u540c\uff0c\u5b83\u5c06 ADC \u96c6\u6210\u5728\u82af\u7247\u4e0a\u3002\u8fd9\u5c31\u4ea7\u751f\u4e86<\/p><ul class=\"wp-block-list\"><li><strong>\u5353\u8d8a\u7684\u6297\u7535\u78c1\u5e72\u6270\u80fd\u529b<\/strong><br>\u4fe1\u53f7\u5c31\u5728\u632f\u819c\u4e0a\u88ab\u6570\u5b57\u5316\uff0c\u56e0\u6b64\u4e0d\u4f1a\u53d7\u5230 PCB \u7ebf\u8def\u4e0a\u7535\u78c1\u566a\u58f0\u7684\u5e72\u6270\u3002<\/li>\n\n<li><strong>\u7b80\u5316 PCB \u5e03\u5c40<\/strong><br>\u65e0\u9700\u7cbe\u5bc6\u6a21\u62df\u8def\u7531\u6216\u989d\u5916\u7684\u6ee4\u6ce2\u5143\u4ef6\u3002<\/li>\n\n<li><strong>\u6027\u80fd\u7a33\u5b9a<\/strong><br>\u4e25\u683c\u7684 ADC \u51fa\u5382\u6821\u51c6\u53ef\u786e\u4fdd\u90e8\u4ef6\u4e0e\u90e8\u4ef6\u4e4b\u95f4\u7684\u5dee\u5f02\u6700\u5c0f\u3002<\/li><\/ul><h2 class=\"wp-block-heading\">2.\u4e24\u4e2a\u4e3b\u8981\u6570\u5b57\u63a5\u53e3<\/h2><h3 class=\"wp-block-heading\">2.1 PDM\uff08\u8109\u51b2\u5bc6\u5ea6\u8c03\u5236\uff09<\/h3><ul class=\"wp-block-list\"><li><strong>\u5982\u4f55\u4f7f\u7528<\/strong> \u8f93\u51fa\u5355\u6bd4\u7279\u9ad8\u901f\u7387\u6570\u636e\u6d41\uff0c\u5176\u5bc6\u5ea6\u4e0e\u58f0\u538b\u7ea7\u76f8\u5bf9\u5e94\u3002<\/li>\n\n<li><strong>\u65f6\u949f<\/strong> \u9700\u8981\u4e00\u6761\u65f6\u949f\u7ebf\uff08\u901a\u5e38\u4e3a 1-3 MHz\uff09\u3002<\/li>\n\n<li><strong>\u4f18\u70b9<\/strong><ul class=\"wp-block-list\"><li>\u975e\u5e38\u7b80\u5355\u7684\u754c\u9762<\/li>\n\n<li>\u5f15\u811a\u6570\u5c11<\/li><\/ul><\/li>\n\n<li><strong>\u7f3a\u70b9<\/strong><ul class=\"wp-block-list\"><li>\u9700\u8981\u5927\u91cf\u7684 MCU\/DSP \u5904\u7406\u6765\u8fdb\u884c\u89e3\u7801\u548c\u6ee4\u6ce2<\/li>\n\n<li>\u9ad8\u901f\u65f6\u949f\u53ef\u80fd\u9700\u8981\u4ed4\u7ec6\u7684 PCB \u5e03\u5c40<\/li><\/ul><\/li><\/ul><h3 class=\"wp-block-heading\">2.2 I\u00b2S\uff08\u96c6\u6210\u7535\u8def\u95f4\u58f0\u97f3\uff09<\/h3><ul class=\"wp-block-list\"><li><strong>\u5982\u4f55\u4f7f\u7528<\/strong> \u901a\u8fc7\u5b57\u9009\u62e9\u548c\u4f4d\u65f6\u949f\u540c\u6b65\u53d1\u9001\u591a\u4f4d\u6570\u5b57\u97f3\u9891\u5b57\uff08\u901a\u5e38\u4e3a 16-24 \u4f4d\uff09\u3002<\/li>\n\n<li><strong>\u65f6\u949f<\/strong> \u4e24\u6761\u6216\u4e09\u6761\u7ebf\u8def\uff1a\u4f4d\u65f6\u949f (BCLK)\u3001\u5b57\u9009\u62e9 (WS) \u548c\u53ef\u9009\u7684\u4e3b\u65f6\u949f (MCLK)\u3002<\/li>\n\n<li><strong>\u4f18\u70b9<\/strong><ul class=\"wp-block-list\"><li>\u97f3\u9891\u5206\u8fa8\u7387\u9ad8\uff0c\u65e0\u9700\u989d\u5916\u8fc7\u6ee4<\/li>\n\n<li>\u652f\u6301\u591a\u79cd\u97f3\u9891\u7f16\u89e3\u7801\u5668\u548c\u6570\u5b57\u4fe1\u53f7\u5904\u7406\u5668<\/li>\n\n<li>\u4fc3\u8fdb\u591a\u9ea6\u514b\u98ce\u540c\u6b65<\/li><\/ul><\/li>\n\n<li><strong>\u7f3a\u70b9<\/strong><ul class=\"wp-block-list\"><li>\u9700\u8981\u66f4\u591a\u63d2\u9500<\/li>\n\n<li>\u7269\u6599\u6e05\u5355\u548c\u5e03\u7ebf\u590d\u6742\u5ea6\u7565\u9ad8<\/li><\/ul><\/li><\/ul><h2 class=\"wp-block-heading\">3.\u5728 PDM \u548c I\u00b2S \u4e4b\u95f4\u505a\u51fa\u9009\u62e9<\/h2><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u6807\u51c6<\/th><th>PDM<\/th><th>I\u00b2S<\/th><\/tr><\/thead><tbody><tr><td><strong>\u9488\u6570<\/strong><\/td><td>\u4f4e\u7535\u5e73\uff08\u6570\u636e + \u65f6\u949f\uff09<\/td><td>\u66f4\u9ad8\uff08BCLK + WS [+ MCLK])<\/td><\/tr><tr><td><strong>\u5904\u7406\u8d1f\u8377<\/strong><\/td><td>\u9ad8\uff08\u56fa\u4ef6\u4e2d\u7684\u62bd\u53d6\/\u6ee4\u6ce2\u5668\uff09<\/td><td>\u4f4e\uff08\u76f4\u63a5\u591a\u4f4d\u6570\u636e\uff09<\/td><\/tr><tr><td><strong>\u97f3\u9891\u8d28\u91cf<\/strong><\/td><td>\u53d6\u51b3\u4e8e\u62bd\u53d6\u6ee4\u6ce2\u5668\u7684\u8bbe\u8ba1<\/td><td>\u539f\u751f\u9ad8\u4f4d\u5206\u8fa8\u7387<\/td><\/tr><tr><td><strong>\u591a\u9ea6\u514b\u98ce\u9635\u5217<\/strong><\/td><td>\u53ef\u80fd\uff0c\u4f46\u590d\u6742<\/td><td>\u901a\u8fc7\u5171\u4eab\u65f6\u949f\u66f4\u8f7b\u677e\u5730\u540c\u6b65<\/td><\/tr><\/tbody><\/table><\/figure><p><strong>\u4f7f\u7528 PDM<\/strong> \u5f53\u60a8\u9700\u8981\u6700\u7b80\u5355\u7684\u786c\u4ef6\u63a5\u53e3\uff0c\u5e76\u6709\u8db3\u591f\u7684\u5904\u7406\u4f59\u91cf\u5728\u8f6f\u4ef6\u4e2d\u8fc7\u6ee4\u6570\u636e\u6d41\u65f6\uff0c\u5c31\u53ef\u4ee5\u4f7f\u7528\u5b83\u3002<br><strong>\u4f7f\u7528 I\u00b2S<\/strong> \u5f53\u60a8\u9700\u8981\u66f4\u9ad8\u5206\u8fa8\u7387\u7684\u97f3\u9891\u3001\u66f4\u5bb9\u6613\u5b9e\u73b0\u591a\u4e2a\u9ea6\u514b\u98ce\u4e4b\u95f4\u7684\u540c\u6b65\u6216\u4e0e\u6807\u51c6\u97f3\u9891\u5916\u8bbe\u517c\u5bb9\u65f6\uff0c\u60a8\u5c31\u53ef\u4ee5\u4f7f\u7528\u8be5\u7cfb\u7edf\u3002<\/p><hr class=\"wp-block-separator has-alpha-channel-opacity\"\/><h2 class=\"wp-block-heading\">4.\u5e26\u6570\u5b57\u8f93\u51fa\u7684 SISTC MEMS \u9ea6\u514b\u98ce<\/h2><p>\u5728 <strong>\u65e0\u9521\u7845\u6e90\u79d1\u6280\u6709\u9650\u516c\u53f8<\/strong>\u6211\u4eec\u7684\u6570\u5b57 MEMS \u9ea6\u514b\u98ce\u652f\u6301 PDM \u548c I\u00b2S \u63a5\u53e3\uff0c\u4e3a\u8bbe\u8ba1\u4eba\u5458\u63d0\u4f9b\u4e86\u6700\u5927\u7684\u7075\u6d3b\u6027\uff1a<\/p><ul class=\"wp-block-list\"><li><strong><a class=\"\" href=\"https:\/\/sistc.com\/zh\/product\/digital-mems-microphone\/\">DM2611 \u6570\u5b57 MEMS \u9ea6\u514b\u98ce<\/a><\/strong><br>- SNR: 64 dB | AOP: 125 dB SPL | \u63a5\u53e3\uff1aPDM \u548c I\u00b2S<\/li>\n\n<li><strong><a class=\"\" href=\"https:\/\/sistc.com\/zh\/product\/digital-mems-microphone\/\">DM4710 \u8d85\u4f4e\u529f\u8017 MEMS \u9ea6\u514b\u98ce<\/a><\/strong><br>- \u5de5\u4f5c\u7535\u6d41\uff1a12 \u00b5A | SNR\uff1a62 dB | \u63a5\u53e3\uff1aPDM \u548c I\u00b2S<\/li><\/ul><p>\u65e0\u8bba\u60a8\u662f\u5728\u6784\u5efa\u667a\u80fd\u626c\u58f0\u5668\u3001\u53ef\u7a7f\u6234\u8bbe\u5907\u8fd8\u662f\u6c7d\u8f66\u8bed\u97f3\u63a7\u5236\u7cfb\u7edf\uff0c\u8fd9\u4e9b\u90e8\u4ef6\u90fd\u80fd\u63d0\u4f9b\u6613\u4e8e\u96c6\u6210\u7684\u53ef\u9760\u6570\u5b57\u97f3\u9891\u3002<\/p><h2 class=\"wp-block-heading\">5.\u66f4\u591a\u9605\u8bfb<\/h2><ul class=\"wp-block-list\"><li><strong>PDM \u4e0e I\u00b2S\uff1a\u9009\u62e9\u5408\u9002\u7684\u6570\u5b57\u9ea6\u514b\u98ce\u63a5\u53e3<\/strong> - \u6a21\u62df\u5668\u4ef6\u6280\u672f\u7b80\u4ecb\u00b9<\/li>\n\n<li><strong>MEMS \u9ea6\u514b\u98ce\u57fa\u7840\u77e5\u8bc6<\/strong> - TDK InvenSense \u767d\u76ae\u4e66\u00b2<\/li><\/ul><p>\u00b9 <a>https:\/\/www.analog.com\/en\/technical-articles\/understanding-pdm-and-i2s-interfaces.html<\/a><br>\u00b2 <a>https:\/\/www.invensense.tdk.com\/technology\/mems-microphones\/<\/a><\/p><p><\/p>","protected":false},"excerpt":{"rendered":"<p>\u5728\u73b0\u4ee3\u97f3\u9891\u7cfb\u7edf\u8bbe\u8ba1\u4e2d\uff0cMEMS\uff08\u5fae\u673a\u7535\u7cfb\u7edf\uff09\u9ea6\u514b\u98ce\u56e0\u5176\u4f53\u79ef\u5c0f\u3001\u529f\u8017\u4f4e\u3001\u6027\u80fd\u5f3a\u800c\u5728\u5f88\u5927\u7a0b\u5ea6\u4e0a\u53d6\u4ee3\u4e86\u4f20\u7edf\u7684\u6a21\u62df\u9ea6\u514b\u98ce\u3002\u5b83\u4eec\u7684\u6700\u5927\u4f18\u52bf\u4e4b\u4e00 [...]<\/p>","protected":false},"author":2,"featured_media":15158,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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