{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4040BIM3X-2.5","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4040BIM3X-2.5","canonicalUrl":"https://icboms.com/texas-instruments/LM4040BIM3X-2.5","factsUrl":"https://icboms.com/api/mcp/products/LM4040BIM3X-2.5","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM4040BIM3X-2.5 precision shunt voltage reference, fixed 2.5V output, ±0.2% tolerance, 35µVrms noise, 65 µA cathode current, SOT-23-3 package.","salesMarkdown":"## Precision shunt reference in a SOT-23-3 footprint The Texas Instruments LM4040BIM3X-2.5 is a precision shunt voltage reference delivering a fixed 2.5V output with a ±0.2% initial tolerance. ## ±0.2% tolerance and 35 µVrms noise floor The ±0.2% tolerance at 25°C sets the initial accuracy floor — a 2.5V reference will sit between 2.495V and 2.505V before temperature drift. For a 12-bit ADC with a 2.5V reference, this noise contributes roughly 0.06 LSB — negligible for most industrial data-acquisition paths, though a 16-bit system may want a lower-noise reference or an external filter cap. As a shunt reference, the LM4040BIM3X-2.5 sinks current through the cathode to regulate the output voltage. The minimum cathode current is 65 µA, and the maximum continuous output current is 15 mA. The design must ensure the series resistor from the supply rail delivers enough current to bias the reference while keeping the total below 15 mA under all load conditions. ## NRND — plan for last-time-buy or alternate The LM4040BIM3X-2.5 carries a Not Recommended for New Designs (NRND) lifecycle status. This means TI has flagged it for eventual discontinuation — new BOMs should not select this part, and existing designs should identify a drop-in replacement or budget for a last-time-buy.","metaTitle":"LM4040BIM3X-2.5 Shunt Voltage Reference, 2.5V ±0.2%","metaDescription":"LM4040BIM3X-2.5 precision shunt reference: fixed 2.5V output, ±0.2% tolerance, 35µVrms noise, SOT-23-3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Tolerance":"±0.2%","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"TO-236-3, SC-59, SOT-23-3","Product Status":"Not For New Designs","Reference Type":"Shunt","Voltage - Input":"-","lifecycle_stage":"eol_hot","Current - Output":"15 mA","Current - Supply":"-","Current - Cathode":"65 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":"100ppm/°C","Voltage - Output (Min/Fixed)":"2.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.7200","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/8c40cf163b5cda64fd88ad5c9f25fe6d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM4040BIM3X-2.5/alternatives.json"},"ai":{"faq":[{"question":"Is LM4040BIM3X-2.5 obsolete or NRND?","answer":"It is not yet discontinued, but TI advises against using it in new designs. Existing production should plan for a last-time-buy or identify a pin-compatible replacement."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4040BIM3X-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/LM4040BIM3X-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}}