{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ADUM1251ARZ","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"ADUM1251ARZ","canonicalUrl":"https://icboms.com/analog-devices/ADUM1251ARZ","factsUrl":"https://icboms.com/api/mcp/products/ADUM1251ARZ","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices ADUM1251ARZ, iCoupler series, I²C digital isolator, 2 channels, 1 Mbps data rate, 2500 Vrms isolation, 3 V to 5.5 V supply, 8-SOIC package, -40°C to 105°C operating temperature.","salesMarkdown":"## What the 1 Mbps data rate means for your I2C bus The ADUM1251ARZ is an I²C digital isolator from Analog Devices' iCoupler series, using magnetic coupling to provide galvanic isolation for a two-wire I2C bus. It supports data rates up to 1 Mbps, which covers standard-mode (100 kHz), fast-mode (400 kHz), and fast-mode-plus (up to 1 MHz) I2C buses without any throughput bottleneck. The part has two channels: one bidirectional for the SDA line and one unidirectional for the SCL line, with the channel count configured as 2/1 (Side 1/Side 2). This architecture is purpose-built for isolated I2C communication where the bus must cross a safety isolation barrier. ## Isolation and transient immunity for noisy environments Rated for 2500 Vrms isolation, this part provides basic or reinforced isolation in industrial motor drives, medical equipment, and power-supply control loops where the I2C bus must bridge a high-voltage boundary. The minimum common-mode transient immunity of 25 kV/µs means the isolator rejects fast voltage spikes that couple across the barrier — a spec that matters in inverter-fed motor drives or switch-mode power supplies where switching edges can exceed several kV/µs. If your system sees those transients, this part holds the bus data intact. ## Supply voltage and temperature range — fitting into the BOM The part is surface-mount in an 8-SOIC package (3.90 mm width), a common footprint that keeps PCB layout straightforward.","metaTitle":"ADUM1251ARZ I2C Digital Isolator, 1 Mbps, 2500 Vrms, 8-SOIC","metaDescription":"ADUM1251ARZ iCoupler I2C digital isolator: 1 Mbps data rate, 2500 Vrms isolation, 3-5.5 V supply, -40 to 105°C. Active, ROHS3.","metaKeywords":null},"attributes":{"series":"iCoupler®","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Digital Isolators"],"specifications":{"Type":"I²C","Series":"iCoupler®","Package":"Tube","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":"$6.97","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$6.97000","currency":"USD"},{"qty":10,"price":"$6.25700","currency":"USD"},{"qty":25,"price":"$5.91480","currency":"USD"},{"qty":100,"price":"$5.12620","currency":"USD"},{"qty":250,"price":"$4.86328","currency":"USD"},{"qty":500,"price":"$4.36380","currency":"USD"},{"qty":1000,"price":"$3.72000","currency":"USD"}]},"links":{"datasheetUrl":"https://www.analog.com/media/en/technical-documentation/data-sheets/ADUM1250_1251.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Does ADUM1251ARZ support 400 kHz I2C?","answer":"Yes. The ADUM1251ARZ has a 1 Mbps data rate, which comfortably exceeds the 400 kHz fast-mode I2C specification. It also supports fast-mode-plus at 1 MHz."},{"question":"Is ADUM1251ARZ compatible with 3.3 V I2C?","answer":"Yes."},{"question":"What is the difference between ADUM1251ARZ and ADUM1250ARZ?","answer":"Both are iCoupler I2C isolators in the same family. The key difference is channel direction: the ADUM1251ARZ has one bidirectional channel (SDA) and one unidirectional channel (SCL), while the ADUM1250ARZ has two bidirectional channels. For a standard I2C bus with a single master, the ADUM1251ARZ is the typical choice; the ADUM1250ARZ suits designs that need bidirectional isolation on both SDA and SCL, such as multi-master or clock-stretching implementations."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/ADUM1251ARZ","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 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}}