{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ADUM1281BRZ","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"ADUM1281BRZ","canonicalUrl":"https://icboms.com/analog-devices/ADUM1281BRZ","factsUrl":"https://icboms.com/api/mcp/products/ADUM1281BRZ","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices ADUM1281BRZ, iCoupler series, digital isolator, 2-channel unidirectional, 3000Vrms isolation, 25Mbps data rate, 3V to 5.5V supply, -40°C to 125°C, 8-SOIC package, Tube.","salesMarkdown":"The ADUM1281BRZ is a two-channel, unidirectional digital isolator from Analog Devices' iCoupler family, built around magnetic coupling rather than optocouplers. It provides 3000Vrms galvanic isolation between a single input on side 1 and a single output on side 2, with a second channel in the same direction — so it handles two independent signals crossing the isolation barrier, like a SPI clock and data line, or a pair of GPIOs. The 25Mbps data rate keeps up with most industrial UARTs, CAN transceivers, and moderate-speed SPI buses. Supply range from 3V to 5.5V means it works on both 3.3V and 5V domains without a separate rail translator. ## 3000Vrms isolation — what it means in the field 3000Vrms is the rated isolation voltage for one minute per the standard. That's enough for basic reinforced insulation in mains-connected equipment up to 300V AC working voltage, or functional isolation in higher-voltage systems. If you're swapping this into a motor-drive or SMPS feedback path, the 3000Vrms rating covers the transient spikes you'd see on a 230V line. The common-mode transient immunity of 25kV/µs means it won't glitch when a nearby relay or IGBT switches — a real concern in noisy industrial cabinets. ## Timing specs that matter for bus margin Propagation delay is 35ns max in either direction, and pulse-width distortion is held to 3ns max. That's tight enough for 25Mbps signaling with a 40ns bit period — you still have a few nanoseconds of margin for PCB trace skew. Rise and fall times are 2.5ns typical, which keeps the edges clean without excessive ringing if you keep the trace length under a few inches. If your system runs at 10Mbps or slower, the 35ns delay is negligible; at 25Mbps you'll want to account for it in the timing budget, especially if the isolator sits in a feedback loop. ## Temperature range and environment The magnetic coupling technology doesn't suffer the LED aging that optocouplers do, which is a plus for long-life industrial or infrastructure equipment. No isolated power output on this variant — it's a pure signal isolator, so you still need a separate DC-DC converter if the secondary side needs its own supply.","metaTitle":"ADUM1281BRZ Digital Isolator, 3000Vrms, 25Mbps, 8-SOIC","metaDescription":"ADI ADUM1281BRZ iCoupler digital isolator: 3000Vrms isolation, 25Mbps data rate, 2 unidirectional channels, -40°C to 125°C, ROHS3.","metaKeywords":null},"attributes":{"series":"iCoupler®","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Digital Isolators"],"specifications":{"Type":"General Purpose","Series":"iCoupler®","Package":"Tube","Data Rate":"25Mbps","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)":"3ns","Propagation Delay tpLH / tpHL (Max)":"35ns, 35ns","Common Mode Transient Immunity (Min)":"25kV/µs"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.83","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$3.83000","currency":"USD"},{"qty":10,"price":"$3.43700","currency":"USD"},{"qty":25,"price":"$3.24960","currency":"USD"},{"qty":100,"price":"$2.81640","currency":"USD"},{"qty":250,"price":"$2.67196","currency":"USD"},{"qty":500,"price":"$2.39754","currency":"USD"},{"qty":1000,"price":"$2.02202","currency":"USD"},{"qty":2500,"price":"$1.92092","currency":"USD"},{"qty":5000,"price":"$1.84870","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/8e75547927d6f41e80c5c7dd03fbac65.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the data rate of ADUM1281BRZ?","answer":"25Mbps maximum. That's the highest signal frequency it can pass cleanly, so it suits SPI, UART, and CAN up to that speed."},{"question":"Is ADUM1281BRZ RoHS compliant?","answer":"Yes, it is ROHS3 compliant."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/ADUM1281BRZ","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/ADUM1281BRZ 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}}