{"id":7285,"date":"2026-06-24T03:23:54","date_gmt":"2026-06-24T03:23:54","guid":{"rendered":"https:\/\/materialparts.com\/adm2481brwz\/"},"modified":"2026-06-24T03:23:54","modified_gmt":"2026-06-24T03:23:54","slug":"adm2481brwz","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/adm2481brwz\/","title":{"rendered":"ADM2481BRWZ"},"content":{"rendered":"

\u4ea7\u54c1\u6982\u89c8<\/h2>\n

The ADM2481BRWZ from Analog Devices is a 2.5kV signal-isolated, 500kbps, half-duplex RS-485 transceiver in a 16-lead wide-body SOIC package. Using iCoupler technology, it integrates a 3-channel isolator with an RS-485 driver and receiver for galvanically isolated communication.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n
\u6570\u636e\u901f\u7387<\/td>\n500 kbps (slew-rate limited)<\/td>\n<\/tr>\n
\u9694\u79bb\u7535\u538b<\/td>\n2500 Vrms (UL 1577)<\/td>\n<\/tr>\n
Common-Mode Transient Immunity<\/td>\n>25 kV\/\u00b5s<\/td>\n<\/tr>\n
Bus Nodes<\/td>\nUp to 256<\/td>\n<\/tr>\n
Supply Voltage (Logic Side)<\/td>\n3.0 V to 5.5 V (VDD1)<\/td>\n<\/tr>\n
Supply Voltage (Bus Side)<\/td>\n4.75 V to 5.25 V (VDD2)<\/td>\n<\/tr>\n
Supply Current<\/td>\n2.5 mA max<\/td>\n<\/tr>\n
Receiver Fail-Safe<\/td>\nTrue fail-safe (open\/shorted inputs)<\/td>\n<\/tr>\n
Protection<\/td>\nThermal shutdown, current limit<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C to +85\u00b0C<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\n16-lead SOIC Wide (7.50mm)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • 2.5kV galvanic isolation using iCoupler technology for RS-485 communication<\/li>\n
  • 500kbps slew-rate-limited data rate for EMI reduction on long cables<\/li>\n
  • Supports up to 256 nodes on bus with 96k\u03a9 input impedance<\/li>\n
  • True fail-safe receiver ensures known state when inputs are open or shorted<\/li>\n
  • Chatter-free power-up and power-down protection<\/li>\n
  • 3.3V or 5V logic side operation with 5V bus side supply<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Isolated RS-485\/RS-422 communication in industrial automation<\/li>\n
    • Building control networks with ground loop isolation<\/li>\n
    • Multipoint data transmission systems requiring galvanic isolation<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The ADM2481BRWZ from Analog Devices is a 2.5kV signal-isolated, 500kbps, half-duplex RS-485 transceiver in a 16-lead wide-body SOIC package. Using iCoupler technology, it integrates a 3-channel isolator with an RS-485 driver and receiver for galvanically isolated communication. Key Specifications Data Rate 500 kbps (slew-rate limited) Isolation Voltage 2500 Vrms (UL 1577) Common-Mode Transient […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[20],"tags":[],"chip_brand":[165],"class_list":["post-7285","post","type-post","status-publish","format-standard","hentry","category-interface-ics","chip_brand-adi"],"acf":{"brief_explanation":"2.5kV isolated 500kbps half-duplex RS-485, iCoupler, 256 nodes, SOIC-16W, fail-safe","date_code":"","package_case":"SOIC-16 Wide (10.50 x 7.60 x 2.35 mm)","in_stock":6340,"datasheet":"https:\/\/www.analog.com\/media\/en\/technical-documentation\/data-sheets\/adm2481.pdf","price":"$3.68 @ 1ku","product_introduction":"The ADM2481BRWZ from Analog Devices is an integrated, galvanically isolated half-duplex RS-485 transceiver designed for bidirectional data communication on balanced, multipoint bus transmission lines. The device uses Analog Devices proprietary iCoupler technology to combine a 3-channel digital isolator, a three-state differential line driver, and a differential input receiver into a single 16-lead wide-body SOIC package. The logic side operates from either a 3V or 5V supply (VDD1), while the bus side requires a 5V supply (VDD2). The device is slew-rate limited to 500kbps, reducing reflections on improperly terminated transmission lines. The 96kOhm receiver input impedance allows up to 256 transceivers on a single bus. True fail-safe receiver inputs ensure a logic-high output when the bus is open or shorted.","working_principle":"The ADM2481BRWZ integrates a digital isolator, RS-485 driver, and RS-485 receiver. The iCoupler isolation uses transformer-based technology to transfer data across the galvanic barrier with 2500Vrms isolation and >25kV\/us common-mode transient immunity. When DE is high, the driver amplifies TxD and drives differential signals onto the A and B bus lines with slew-rate limiting for EMI reduction. When RE is low, the receiver compares the voltage difference between A and B with true fail-safe threshold ensuring high output when inputs are open or shorted. VDD1 powers the logic side and VDD2 powers the bus side, with the isolation barrier preventing ground loops.","pin_description":"
      Pin<\/th>Name<\/th>Function<\/th><\/tr>
      1<\/td>VDD1<\/td>Logic side supply (3-5.5V)<\/td><\/tr>
      2,7,8<\/td>GND1<\/td>Logic side ground<\/td><\/tr>
      3<\/td>RxD<\/td>Receiver data output<\/td><\/tr>
      4<\/td>RE<\/td>Receiver enable (active low)<\/td><\/tr>
      5<\/td>DE<\/td>Driver enable (active high)<\/td><\/tr>
      6<\/td>TxD<\/td>Transmit data input<\/td><\/tr>
      9,10,15<\/td>GND2<\/td>Bus side ground<\/td><\/tr>
      12<\/td>A<\/td>Non-inverting bus I\/O<\/td><\/tr>
      13<\/td>B<\/td>Inverting bus I\/O<\/td><\/tr>
      16<\/td>VDD2<\/td>Bus side supply (5V)<\/td><\/tr><\/table>","application_scenarios":"
      • Isolated RS-485 communication in industrial automation with ground loop prevention<\/li>
      • Building control network data transmission with 2.5kV galvanic isolation<\/li>
      • Multipoint bus systems requiring up to 256 nodes and fail-safe operation<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        ADI<\/td>ADM2587EBRWZ<\/td>SOIC-20W<\/td>Isolated, 500kbps, integrated DC\/DC<\/td><\/tr>
        TI<\/td>ISO3086DW<\/td>SOIC-16W<\/td>Isolated RS-485, 500kbps<\/td><\/tr>
        ADI<\/td>ADM2483EBRWZ<\/td>SOIC-16W<\/td>Isolated, 500kbps, 3.3V bus<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7285","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/comments?post=7285"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7285\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=7285"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=7285"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=7285"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=7285"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}