{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ADUM1281BRZ-RL7","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"ADUM1281BRZ-RL7","canonicalUrl":"https://icboms.com/analog-devices/ADUM1281BRZ-RL7","factsUrl":"https://icboms.com/api/mcp/products/ADUM1281BRZ-RL7","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices ADUM1281BRZ-RL7, iCoupler series, General Purpose digital isolator, 2 channels, 1/1 unidirectional, 25Mbps data rate, 3000Vrms isolation, 3V to 5.5V supply, -40°C to 125°C, 8-SOIC package, Tape & Reel.","salesMarkdown":"## Digital isolator for industrial signal isolation — 3000 Vrms, 25 Mbps, two unidirectional channels The Analog Devices ADUM1281BRZ-RL7 is a two-channel digital isolator from the iCoupler family, built around magnetic coupling technology. It provides 3000 Vrms of galvanic isolation between a single input on side 1 and a single output on side 2, with the second channel configured in the same direction — a 1/1 unidirectional arrangement. The part supports data rates up to 25 Mbps, making it suitable for isolating SPI, UART, or general-purpose digital signals in industrial control, motor drives, and isolated power-supply feedback paths. The 3000 Vrms isolation rating is the working voltage the part can withstand between input and output sides for one minute per the production test. For a 240 VAC mains-referenced circuit, this provides reinforced insulation with margin. In practice, the 3000 Vrms rating covers most industrial applications where the isolated side is a sensor, encoder, or communication bus referenced to a different ground potential. The common-mode transient immunity of 25 kV/µs minimum means the part will not latch or corrupt data when fast voltage transients — typical in motor-drive PWM edges or relay switching — couple across the isolation barrier. ## 25 Mbps data rate and timing margins At 25 Mbps, the ADUM1281BRZ-RL7 handles a 12.5 MHz clock or NRZ data stream with a 40 ns bit period. The maximum propagation delay of 35 ns in either direction leaves only 5 ns of timing margin for a full round-trip — tight for a closed-loop SPI transaction at 25 Mbps, but workable if the master and slave are on the same side of the barrier. The 3 ns maximum pulse-width distortion keeps the duty-cycle error small, which matters for protocols like RS-485 or CAN that rely on edge timing. Rise and fall times are typically 2.5 ns, so signal integrity on the PCB trace matters — keep the stub length under 15 mm from the isolator output to the receiving gate. ## Temperature range and deployment environment The 125°C upper limit covers engine-bay electronics, outdoor telecom cabinets in direct sunlight, and factory-floor sensors near hot machinery. The part is surface-mount only, so reflow soldering is assumed — no through-hole option exists. ## Lifecycle and sourcing posture It is ROHS3 compliant. No LTB risk exists for production programs that qualify this part today.","metaTitle":"ADUM1281BRZ-RL7 iCoupler Digital Isolator, 3000Vrms, 25Mbps","metaDescription":"ADI ADUM1281BRZ-RL7 dual-channel digital isolator with 3000Vrms isolation, 25Mbps data rate, -40°C to 125°C range.","metaKeywords":null},"attributes":{"series":"iCoupler®","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Digital Isolators"],"specifications":{"Type":"General Purpose","Series":"iCoupler®","Package":"Tape & Reel (TR); Cut Tape (CT)","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":2000,"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 data rate does ADUM1281BRZ-RL7 support?","answer":"The part supports data rates up to 25 Mbps, with a maximum propagation delay of 35 ns and typical rise/fall times of 2.5 ns."},{"question":"What channels does ADUM1281BRZ-RL7 support?","answer":"It has two unidirectional channels configured as 1 input on side 1 and 1 input on side 2 — both channels run in the same direction (side 1 to side 2)."},{"question":"How does ADUM1281BRZ-RL7 compare to ADUM1210BRZ-RL7?","answer":"The ADUM1281BRZ-RL7 offers 25 Mbps, 3000 Vrms, and 125°C operation — a step up in speed, isolation, and temperature capability for the same 8-SOIC footprint."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/ADUM1281BRZ-RL7","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-RL7 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}}