{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ADUM1281WARZ","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"ADUM1281WARZ","canonicalUrl":"https://icboms.com/analog-devices/ADUM1281WARZ","factsUrl":"https://icboms.com/api/mcp/products/ADUM1281WARZ","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices ADUM1281WARZ, iCoupler® 2-channel unidirectional digital isolator, 1Mbps data rate, 3000Vrms isolation, 25kV/µs CMTI, 3V–5.5V supply, -40°C to 125°C, 8-SOIC package, tube.","salesMarkdown":"## Two-channel unidirectional isolation for automotive signal chains The ADUM1281WARZ: It provides 3000Vrms galvanic isolation between two independent supply domains, with one channel per side (one input on side 1, one input on side 2). ## 1Mbps data rate with 50ns propagation delay Data rate is rated at 1Mbps, with a maximum propagation delay of 50ns (tPLH / tPHL) and pulse-width distortion held to 10ns. Rise and fall times are symmetrical at 2.5ns typical. This timing budget suits isolated SPI, UART, and general-purpose GPIO isolation at moderate speeds — the 1Mbps ceiling is a comfortable fit for CAN transceiver isolation (typically 500kbps to 1Mbps) and for breaking ground loops in sensor readout lines without introducing excessive skew. The 25kV/µs minimum common-mode transient immunity (CMTI) means the isolator holds its output state through fast voltage spikes on the isolation barrier, which is critical in motor-drive and inverter environments where switching transients exceed 10kV/µs. ## 3V to 5.5V supply — single-rail operation The part does not include an integrated isolated DC-DC converter (isolated power: No), so each side requires its own local supply rail — a clean 3.3V or 5V from the system regulator, with the usual 0.1µF decoupling caps placed close to the supply pins.","metaTitle":"ADUM1281WARZ Digital Isolator, 2-Ch, 1Mbps, 3000Vrms, SOIC-8","metaDescription":"ADUM1281WARZ automotive-grade 2-channel digital isolator with 3000Vrms isolation, 1Mbps data rate, 25kV/µs CMTI, -40°C to 125°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Digital Isolators"],"specifications":{"Type":"General Purpose","Grade":"Automotive","Package":"Tube","Data Rate":"1Mbps","Technology":"Magnetic Coupling","Channel Type":"Unidirectional","Mounting Type":"Surface Mount","Isolated Power":"No","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"3V ~ 5.5V","Number of Channels":"2","Voltage - Isolation":"3000Vrms","Operating Temperature":"-40°C ~ 125°C","Inputs - Side 1/Side 2":"1/1","Rise / Fall Time (Typ)":"2.5ns, 2.5ns","Supplier Device Package":"8-SOIC","Pulse Width Distortion (Max)":"10ns","Propagation Delay tpLH / tpHL (Max)":"50ns, 50ns","Common Mode Transient Immunity (Min)":"25kV/µs"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.27","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$5.27000","currency":"USD"},{"qty":10,"price":"$4.73500","currency":"USD"},{"qty":25,"price":"$4.47680","currency":"USD"},{"qty":100,"price":"$3.87990","currency":"USD"},{"qty":250,"price":"$3.68096","currency":"USD"},{"qty":500,"price":"$3.30290","currency":"USD"},{"qty":1000,"price":"$2.78558","currency":"USD"},{"qty":2500,"price":"$2.64630","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/8e75547927d6f41e80c5c7dd03fbac65.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is ADUM1281WARZ a direct replacement for ADUM1201?","answer":"No. The ADUM1201WSRZ is a 1Mbps automotive-grade 2-channel isolator with a 2500Vrms isolation rating and a 150ns propagation delay, while the ADUM1281WARZ offers 3000Vrms isolation and a faster 50ns propagation delay. Pinout and channel configuration differ — the ADUM1201 has both inputs on side 1, whereas the ADUM1281 has one input on each side. They are not drop-in replacements."},{"question":"Does ADUM1281WARZ require an external isolated power supply?","answer":"Yes. The part does not include an integrated isolated DC-DC converter, so each side of the isolation barrier needs its own local supply rail (3V to 5.5V)."},{"question":"Is ADUM1281WARZ compatible with 3.3V systems?","answer":"Yes, the supply voltage range extends down to 3V, so it works directly with 3.3V logic without level translation."},{"question":"What is the difference between ADUM1281WARZ and ADUM1281BRZ?","answer":"Both share the same 1Mbps data rate, 3000Vrms isolation, and 8-SOIC package."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/ADUM1281WARZ","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/ADUM1281WARZ when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}