{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ADUM1281CRZ","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"ADUM1281CRZ","canonicalUrl":"https://icboms.com/analog-devices/ADUM1281CRZ","factsUrl":"https://icboms.com/api/mcp/products/ADUM1281CRZ","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices ADUM1281CRZ iCoupler digital isolator, 2-channel unidirectional, 100Mbps data rate, 3000Vrms isolation, 25kV/µs CMTI, 3V to 5.5V supply, -40°C to 125°C, 8-SOIC package.","salesMarkdown":"## 100 Mbps isolation — what it buys you The ADUM1281CRZ is a two-channel, unidirectional digital isolator from Analog Devices' iCoupler family, built around magnetic coupling. Its headline rating is the 100 Mbps data rate — that is fast enough to isolate SPI clocks up to 50 MHz, CAN FD at full speed, or a pair of high-speed digital lines without adding timing jitter that messes up your bus budget. The 3000 Vrms isolation rating covers reinforced insulation for industrial motor drives, medical patient-interface circuits, and solar inverters where the safety barrier is non-negotiable. Common-mode transient immunity of 25 kV/µs means this part will not glitch when a nearby IGBT switches a few hundred volts in nanoseconds — a real concern in variable-frequency drives and UPS systems where the ground plane bounces hard. Propagation delay is 24 ns max each way, with pulse-width distortion held to 2 ns, so your timing margins stay predictable across temperature. ## Supply and logic compatibility Yes, it is compatible with 3.3 V logic: the inputs are CMOS thresholds that see a 3.3 V signal as a clean high. The unidirectional channel arrangement is one input on side 1 and one on side 2, which covers the common case of a TX/RX pair or a clock/data pair going opposite directions. ## Package and field-fit Comes in a standard 8-SOIC (3.90 mm width) — the same footprint as an SOIC-8 op-amp or a small logic gate. No isolated power on-chip, so you still need a separate DC-DC or an isolated module if the secondary side needs its own supply rail. Surface-mount only; rework with a hot-air station is straightforward, no underfill needed. ## Lifecycle and sourcing ROHS3 compliant, so it passes into European and California-restricted markets without exemption paperwork.","metaTitle":"ADUM1281CRZ Digital Isolator, 100Mbps, 3000Vrms, 8-SOIC","metaDescription":"ADUM1281CRZ iCoupler 2-channel unidirectional digital isolator. 100Mbps data rate, 3000Vrms isolation, 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":"100Mbps","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)":"2ns","Propagation Delay tpLH / tpHL (Max)":"24ns, 24ns","Common Mode Transient Immunity (Min)":"25kV/µs"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.47","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$4.47000","currency":"USD"},{"qty":10,"price":"$4.01400","currency":"USD"},{"qty":25,"price":"$3.79520","currency":"USD"},{"qty":100,"price":"$3.28910","currency":"USD"},{"qty":250,"price":"$3.12040","currency":"USD"},{"qty":500,"price":"$2.79992","currency":"USD"},{"qty":1000,"price":"$2.36138","currency":"USD"},{"qty":2500,"price":"$2.24331","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/8e75547927d6f41e80c5c7dd03fbac65.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the data rate of ADUM1281CRZ?","answer":"The ADUM1281CRZ is rated for 100 Mbps data rate. That is the key difference from the ADUM1281ARZ sibling, which runs at 10 Mbps — the CRZ is the part to pick when you are isolating a fast SPI bus or a high-speed digital link."},{"question":"Can ADUM1281CRZ replace ADUM1200?","answer":"The ADUM1200 is a two-channel unidirectional isolator in the same iCoupler family, but its data rate tops out at 1 Mbps or 10 Mbps depending on the speed grade. The ADUM1281CRZ at 100 Mbps is a drop-in replacement for the pinout and isolation rating, provided your system can tolerate the faster edge rates — check the rise/fall time of 2.5 ns against your EMI budget."},{"question":"Is ADUM1281CRZ compatible with 3.3V logic?","answer":"Yes."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/ADUM1281CRZ","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/ADUM1281CRZ 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}}