{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ADUM1251ARZ-RL7","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"ADUM1251ARZ-RL7","canonicalUrl":"https://icboms.com/analog-devices/ADUM1251ARZ-RL7","factsUrl":"https://icboms.com/api/mcp/products/ADUM1251ARZ-RL7","rawCanonicalId":null},"summary":{"shortDescription":"ADI iCoupler ADUM1251ARZ-RL7, I²C digital isolator, 2-channel bidirectional/unidirectional, 2500Vrms isolation, 1Mbps data rate, 3V-5.5V supply, -40°C to 105°C, 8-SOIC package.","salesMarkdown":"## I²C bus isolator — 2500Vrms galvanic isolation for mixed-voltage domains The ADUM1251ARZ-RL7: It provides 2500Vrms galvanic isolation between two I²C bus segments, handling bidirectional SDA and SCL lines with one unidirectional channel for an additional signal. The 1Mbps data rate covers standard and fast-mode I²C operation up to 400kHz plus headroom for clock stretching. Supply range from 3V to 5.5V lets it bridge a 3.3V controller side to a 5V sensor side without a separate level shifter. ## Why the 25kV/µs CMTI and 2500Vrms matter for your BOM Common-mode transient immunity of 25kV/µs minimum means this isolator won't glitch the I²C bus when a motor-drive IGBT switches at several kV/µs — a real failure mode in inverter-fed systems. The 2500Vrms isolation rating satisfies basic reinforced insulation requirements for many industrial and medical applications. Pulse width distortion is specified at 145ns max for the bidirectional channels and 85ns for the unidirectional one, so the SCL/SDA timing budget stays intact even with the isolation barrier in the path.","metaTitle":"ADUM1251ARZ-RL7 I²C Digital Isolator, 2500Vrms, 1Mbps","metaDescription":"ADUM1251ARZ-RL7 iCoupler I²C digital isolator, 2500Vrms isolation, 1Mbps data rate, 3V-5.5V supply, -40°C to 105°C, SOIC-8. Active part, order against RFQ.","metaKeywords":null},"attributes":{"series":"iCoupler®","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Digital Isolators"],"specifications":{"Type":"I²C","Series":"iCoupler®","Package":"Tape & Reel (TR); Cut Tape (CT)","Data Rate":"1Mbps","Technology":"Magnetic Coupling","Channel Type":"Bidirectional, 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":"2500Vrms","Operating Temperature":"-40°C ~ 105°C","Inputs - Side 1/Side 2":"2/1","Supplier Device Package":"8-SOIC","Pulse Width Distortion (Max)":"145ns, 85ns","Common Mode Transient Immunity (Min)":"25kV/µs"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$6.64","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$6.64000","currency":"USD"},{"qty":10,"price":"$5.96100","currency":"USD"},{"qty":25,"price":"$5.63600","currency":"USD"},{"qty":100,"price":"$4.88440","currency":"USD"},{"qty":250,"price":"$4.63388","currency":"USD"},{"qty":500,"price":"$4.15796","currency":"USD"},{"qty":1000,"price":"$3.50672","currency":"USD"},{"qty":2000,"price":"$3.33139","currency":"USD"}]},"links":{"datasheetUrl":"https://www.analog.com/media/en/technical-documentation/data-sheets/ADUM1250_1251.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Can ADUM1251 be used for I²C level shifting?","answer":"Yes. With a 3V to 5.5V supply range, it can bridge a 3.3V controller to a 5V peripheral while providing galvanic isolation — no separate level translator needed."},{"question":"How does ADUM1251ARZ-RL7 compare to ADUM1250?","answer":"The ADUM1250 is a 2-channel bidirectional I²C isolator with similar isolation and speed ratings. The ADUM1251 adds a third unidirectional channel (2/1 input-side/side-2 ratio vs 2/0), giving an extra isolated signal path for features like a reset or interrupt line."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/ADUM1251ARZ-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/ADUM1251ARZ-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}}