{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MAX5478ETE+","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"MAX5478ETE","canonicalUrl":"https://icboms.com/analog-devices/MAX5478ETE","factsUrl":"https://icboms.com/api/mcp/products/MAX5478ETE%2B","rawCanonicalId":null},"summary":{"shortDescription":"Maxim Integrated MAX5478ETE+ digital potentiometer, 50kΩ, 256 taps, 2-circuit, I2C interface, non-volatile, 16-TQFN (3x3) package, tube.","salesMarkdown":"## 50kΩ, 256-tap, dual-channel digital pot with non-volatile memory The MAX5478ETE+ is a dual-channel digital potentiometer from Maxim Integrated, configured as a linear-taper potentiometer with 256 tap positions per channel and a total end-to-end resistance of 50kΩ. Each channel is independently controlled via an I2C interface, and the wiper position is stored in non-volatile memory, so the setting persists across power cycles without a separate EEPROM write sequence. ## Temperature drift and wiper resistance — the specs that govern set-point accuracy The 70ppm/°C temperature coefficient means a 50°C swing shifts the resistance by about 175Ω — roughly 0.35% of full scale — which is acceptable for most bias and adjustment circuits but worth derating if the pot sets a precision reference voltage. Wiper resistance is 325Ω typical, which adds a series offset at the wiper terminal; the effective resistance between wiper and either end of the string is the programmed tap resistance plus this 325Ω, so the minimum output resistance is never zero. Tolerance is ±25% on the total end-to-end resistance — the absolute value varies part-to-part, but the ratiometric tap accuracy (the INL/DNL between adjacent taps) is tighter, so the pot is better suited for divider applications than for precision absolute resistance. ## Supply range, interface, and memory type for system integration The I2C interface supports a selectable address (via the Selectable Address feature), allowing up to two of these devices on the same bus without address conflicts — useful when calibrating multiple channels from one microcontroller. Non-volatile memory stores the wiper setting at power-down and restores it on power-up, so the pot does not need a re-initialization routine after every brown-out or power cycle. ## 16-TQFN (3x3) exposed-pad package — PCB layout and thermal considerations Surface-mount assembly with a standard reflow profile is typical; the package is compatible with lead-free solder processes given the ROHS3 compliance.","metaTitle":"MAX5478ETE+ Digital Potentiometer, 50kΩ, 256 Taps, I2C","metaDescription":"MAX5478ETE+ digital potentiometer: 50kΩ, 256 taps, 2 circuits, I2C interface, non-volatile memory. Active production, ROHS3 compliant. In-stock for BOM.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Taper":"Linear","Package":"Tube","Features":"Selectable Address","Interface":"I2C","Tolerance":"±25%","Memory Type":"Non-Volatile","Configuration":"Potentiometer","Mounting Type":"Surface Mount","Number of Taps":"256","Package / Case":"16-WFQFN Exposed Pad","lifecycle_stage":"eol_hot","Voltage - Supply":"2.7V ~ 5.25V","Resistance (Ohms)":"50k","Number of Circuits":"2","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"16-TQFN (3x3)","Temperature Coefficient (Typ)":"70ppm/°C","Resistance - Wiper (Ohms) (Typ)":"325"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$6.16","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$6.16000","currency":"USD"},{"qty":10,"price":"$5.52900","currency":"USD"},{"qty":25,"price":"$5.22680","currency":"USD"},{"qty":100,"price":"$4.52980","currency":"USD"},{"qty":300,"price":"$4.29753","currency":"USD"},{"qty":500,"price":"$3.85618","currency":"USD"},{"qty":1000,"price":"$3.25220","currency":"USD"},{"qty":2500,"price":"$3.08959","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/566b5fe3d6caa098620d94a8321a0cfe.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the taper and how many taps does the MAX5478ETE+ have?","answer":"The MAX5478ETE+ uses a linear taper with 256 tap positions per channel, giving a resolution of about 0.39% of full-scale resistance per step."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/MAX5478ETE","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/MAX5478ETE when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:45:10.375Z","lastPublished":"2026-07-22T19:45:10.375Z","indexable":true}}