{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ADUM2281ARIZ","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"ADUM2281ARIZ","canonicalUrl":"https://icboms.com/analog-devices/ADUM2281ARIZ","factsUrl":"https://icboms.com/api/mcp/products/ADUM2281ARIZ","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices ADUM2281ARIZ iCoupler digital isolator, 2-channel unidirectional, 5000Vrms isolation, 1Mbps data rate, 16-SOIC wide-body, -40°C to 125°C.","salesMarkdown":"## What this isolator does and where it lives The ADUM2281ARIZ is a two-channel, unidirectional digital isolator from Analog Devices' iCoupler family, built around magnetic coupling technology. It provides 5000Vrms of galvanic isolation between two power domains, with one channel going from Side 1 to Side 2 and the other in the same direction — a 1/1 input-side/side-2 split. The data rate tops out at 1Mbps, with propagation delay typically 50ns max and pulse-width distortion held to 10ns. Supply voltage runs from 3V to 5.5V, so it can bridge a 3.3V controller to a 5V peripheral or vice versa. It comes in a 16-pin SOIC wide-body (0.295\" width) for surface-mount assembly. ## 5000Vrms isolation — what that buys you in the field The 5000Vrms isolation rating is the headline spec for this part. It means the ADUM2281ARIZ can withstand a 5kV potential between its two sides for one minute per the production test, which covers reinforced insulation requirements for many industrial and medical applications. The wide-body SOIC package gives the creepage distance needed to maintain that rating across the board. If your design needs to break a ground loop between a sensor front-end and a controller, or isolate a communication bus in a motor drive, this part has the voltage headroom. ## 1Mbps data rate — is it fast enough? At 1Mbps, this is not a high-speed isolator. It is sized for UART, SPI at moderate clock rates, GPIO status signals, or slow serial buses like I²C (with appropriate external pull-ups). The 50ns propagation delay and 2.5ns rise/fall times mean it can handle a 1MHz clock without significant skew, but if you are pushing 10Mbps or faster, you need a different part in the ADUM family. The 25kV/µs common-mode transient immunity is the saving grace here — it keeps the output from glitching when a motor drive or inverter switches, which is exactly the environment where a 1Mbps link is common. The 125°C upper limit covers most engine-bay and factory-floor environments. If your application stays in a conditioned room, the commercial-grade sibling might save a few cents, but the industrial temp range gives you margin for derating and reliability.","metaTitle":"ADUM2281ARIZ Digital Isolator, 5000Vrms, 1Mbps, 16-SOIC","metaDescription":"ADUM2281ARIZ iCoupler digital isolator: 2 channels, 5000Vrms isolation, 1Mbps data rate, -40°C to 125°C. Request quote for pricing and availability.","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":"16-SOIC (0.295\\\", 7.50mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"3V ~ 5.5V","Number of Channels":"2","Voltage - Isolation":"5000Vrms","Operating Temperature":"-40°C ~ 125°C","Inputs - Side 1/Side 2":"1/1","Rise / Fall Time (Typ)":"2.5ns, 2.5ns","Supplier Device Package":"16-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":"$5.19","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$5.19000","currency":"USD"},{"qty":10,"price":"$4.66300","currency":"USD"},{"qty":25,"price":"$4.40880","currency":"USD"},{"qty":100,"price":"$3.82080","currency":"USD"},{"qty":250,"price":"$3.62488","currency":"USD"},{"qty":500,"price":"$3.25260","currency":"USD"},{"qty":1000,"price":"$2.74316","currency":"USD"},{"qty":2500,"price":"$2.60600","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/a3bf07a230f12ea14d79738dbc1a1507.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Can ADUM2281ARIZ replace ADUM2280?","answer":"The ADUM2281ARIZ and ADUM2280 are both two-channel unidirectional isolators in the same iCoupler family, but they differ in channel direction. The ADUM2281ARIZ has a 1/1 input-side/side-2 split (one channel each direction), while the ADUM2280 has a 2/0 split (both channels going the same way). They share the same 5000Vrms isolation, 1Mbps data rate, and 16-SOIC wide-body package, so they are pin-compatible for the same footprint. The choice depends on whether you need bidirectional isolation or two outputs on the same side."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/ADUM2281ARIZ","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/ADUM2281ARIZ 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}}