{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4040EIM3-2.5","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4040EIM3-2.5","canonicalUrl":"https://icboms.com/texas-instruments/LM4040EIM3-2.5","factsUrl":"https://icboms.com/api/mcp/products/LM4040EIM3-2.5","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM4040EIM3-2.5, precision shunt voltage reference, fixed 2.5V output, ±2% tolerance, 70 µA cathode current, 15 mA output, 150 ppm/°C drift, SOT-23-3 package, -40°C to 85°C.","salesMarkdown":"The LM4040EIM3-2.5 is a precision shunt voltage reference from Texas Instruments, delivering a fixed 2.5 V output with ±2% initial tolerance. It operates as a shunt (two-terminal) reference, meaning it sinks current through a cathode resistor from a supply rail to regulate the output voltage — similar in application to a Zener diode but with tighter accuracy and lower drift. The SOT-23-3 package (TO-236-3, SC-59) keeps board footprint small. ## Key ratings that drive the design decision The ±2% tolerance is the accuracy floor for the reference voltage at 25°C — if your ADC or comparator needs better than 50 mV absolute accuracy at 2.5 V, this grade is adequate for many 8- to 10-bit systems.","metaTitle":"LM4040EIM3-2.5 Shunt Voltage Reference, 2.5V ±2%, SOT-23-3","metaDescription":"Texas Instruments LM4040EIM3-2.5 precision shunt reference, fixed 2.5V output, ±2% tolerance, 70µA cathode current, SOT-23-3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Tolerance":"±2%","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"TO-236-3, SC-59, SOT-23-3","Product Status":"Obsolete","Reference Type":"Shunt","Voltage - Input":"-","lifecycle_stage":"eol_hot","Current - Output":"15 mA","Current - Supply":"-","Current - Cathode":"70 µA","Base Product Number":"LM4040","Noise - 0.1Hz to 10Hz":"-","Noise - 10Hz to 10kHz":"35µVrms","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"SOT-23-3","Temperature Coefficient":"150ppm/°C","Voltage - Output (Min/Fixed)":"2.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.0400","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/8c40cf163b5cda64fd88ad5c9f25fe6d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM4040EIM3-2.5/alternatives.json"},"ai":{"faq":[{"question":"What is the tolerance of LM4040EIM3-2.5?","answer":"The initial tolerance is ±2% at 25°C. This is a standard commercial grade — adequate for general-purpose analog references but not for high-precision 16-bit ADC applications where tighter grades (e.g., ±0.1%) are required."},{"question":"What is the replacement for LM4040EIM3-2.5?","answer":"No official direct replacement is listed in the lifecycle data. The LM4040 family includes many variants with different tolerances, packages, and temperature ranges — a current-production LM4040 with the same 2.5 V output and SOT-23-3 package (e.g., LM4040AIM3-2.5) may be footprint-compatible, but confirm the tolerance and temperature grade against your BOM requirements."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4040EIM3-2.5","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM4040EIM3-2.5 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T18:03:28.771Z","lastPublished":"2026-07-22T18:03:28.771Z","indexable":true}}