{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ADUM1281ARZ","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"ADUM1281ARZ","canonicalUrl":"https://icboms.com/analog-devices/ADUM1281ARZ","factsUrl":"https://icboms.com/api/mcp/products/ADUM1281ARZ","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices ADUM1281ARZ, iCoupler series, General Purpose digital isolator, 2-channel unidirectional, 1Mbps data rate, 3000Vrms isolation, 25kV/µs CMTI, 3V-5.5V supply, -40°C to 125°C, 8-SOIC package, Tube.","salesMarkdown":"## General-purpose isolation for industrial and motor-drive signal paths The Analog Devices ADUM1281ARZ is a two-channel digital isolator from the iCoupler family, built around magnetic coupling technology. It provides 3000Vrms isolation between the logic sides while passing unidirectional data at up to 1Mbps. The 25kV/µs common-mode transient immunity rating means it holds its state through the fast voltage edges found in motor-drive inverters and GaN/SiC gate-drive stages — a spec that separates it from optocoupler-based parts that can latch or glitch under the same dV/dt. The 3000Vrms isolation voltage is a 1-minute withstand rating per UL 1577. For a motor-drive control board isolating the MCU-side logic from the high-voltage gate-driver side, this provides basic insulation for 240VAC mains environments. The 25kV/µs common-mode transient immunity is the more practical spec: it tells you the part will not corrupt its output when a fast-switching power stage slams the isolated ground plane. If you are isolating a 3.3V UART or SPI bus across a 48V or 400V DC bus, the 1Mbps data rate is sufficient — but it will not support full-speed CAN (1Mbps is marginal for CAN timing) or 100Base-T Ethernet. The 50ns max propagation delay in each direction adds about 100ns round-trip latency, which matters for control-loop timing in fast current regulators. ## Package and layout: 8-SOIC with unidirectional channels The ADUM1281ARZ comes in the standard 8-SOIC narrow-body footprint (3.90mm width). The two channels are unidirectional with one input on side 1 and one input on side 2 — so this is not a transceiver; you need to know your data direction before layout. No isolated power is provided on-chip, so each side needs its own local supply rail (3V to 5.5V). The 2.5ns typical rise/fall time means the output edges are fast enough to cause ringing if the trace is long — keep the output load under 15pF and the trace under 2cm to avoid reflection issues. ## Lifecycle and compliance: active, ROHS3, no LTB risk It is ROHS3 compliant. No official cross-reference to a second manufacturer exists; ADI is the sole source for iCoupler technology.","metaTitle":"ADUM1281ARZ Digital Isolator, 3000Vrms, 1Mbps, 8-SOIC","metaDescription":"ADUM1281ARZ iCoupler 2-channel digital isolator with 3000Vrms isolation, 1Mbps data rate, 25kV/µs CMTI, -40°C to 125°C. Active, 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":"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":"$3.32","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$3.32000","currency":"USD"},{"qty":10,"price":"$2.98100","currency":"USD"},{"qty":25,"price":"$2.81800","currency":"USD"},{"qty":100,"price":"$2.44220","currency":"USD"},{"qty":250,"price":"$2.31696","currency":"USD"},{"qty":500,"price":"$2.07898","currency":"USD"},{"qty":1000,"price":"$1.75336","currency":"USD"},{"qty":2500,"price":"$1.66569","currency":"USD"},{"qty":5000,"price":"$1.60307","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/8e75547927d6f41e80c5c7dd03fbac65.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is ADUM1281ARZ compatible with 3.3V logic?","answer":"Yes. The supply voltage range is 3V to 5.5V, so it operates directly from a 3.3V rail. Both input and output logic levels track the supply on each side, meaning a 3.3V supply on side 1 gives 3.3V CMOS thresholds on that side."},{"question":"Is ADUM1281ARZ RoHS compliant?","answer":"Yes, the ADUM1281ARZ is ROHS3 compliant per Analog Devices' classification."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/ADUM1281ARZ","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/ADUM1281ARZ 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}}