{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4040D25QDBZTG4","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4040D25QDBZTG4","canonicalUrl":"https://icboms.com/texas-instruments/LM4040D25QDBZTG4","factsUrl":"https://icboms.com/api/mcp/products/LM4040D25QDBZTG4","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM4040D25QDBZTG4, precision shunt voltage reference, fixed 2.5 V output, ±1% tolerance, 80 µA cathode current, 15 mA output, SOT-23-3, -40°C to 125°C, Tape & Reel.","salesMarkdown":"## 2.5 V shunt reference in a SOT-23-3 package It operates as a two-terminal shunt (like a Zener), requiring only a cathode resistor from the supply rail — no external bypass capacitor needed for stability. The 80 µA cathode current floor lets it run from a low-power bias, while the 15 mA output capability can source enough current to bias multiple ADC inputs or a comparator threshold divider. ## Temperature drift and noise floor The 35 µVrms noise (10 Hz to 10 kHz) is low enough that it won't dominate the ADC's SNR in most industrial signal chains; if your application needs sub-10 µV noise, step up to the LM4040A25 (higher grade, lower drift).","metaTitle":"TI LM4040D25QDBZTG4 Shunt Voltage Reference, 2.5 V ±1%","metaDescription":"Texas Instruments LM4040D25QDBZTG4 precision shunt voltage reference, fixed 2.5 V output, ±1% tolerance, 80 µA cathode current, SOT-23-3, -40°C to 125°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Tape & Reel (TR)","Tolerance":"±1%","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"TO-236-3, SC-59, SOT-23-3","Reference Type":"Shunt","Voltage - Input":"-","lifecycle_stage":"eol_hot","Current - Output":"15 mA","Current - Supply":"-","Current - Cathode":"80 µA","Base Product Number":"LM4040","Noise - 0.1Hz to 10Hz":"-","Noise - 10Hz to 10kHz":"35µVrms","Operating Temperature":"-40°C~125°C(TA)","Supplier Device Package":"SOT-23-3","Temperature Coefficient":"150ppm/°C","Voltage - Output (Min/Fixed)":"2.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.5300","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM4040D25QDBZTG4/alternatives.json"},"ai":{"faq":[{"question":"What is the best replacement for LM4040D25QDBZTG4 if it is out of stock?","answer":"The closest pin-compatible alternative within the same family is the LM4040A25 (higher precision grade, ±0.1% tolerance) or the LM4040C25 (±0.5%). Both share the same SOT-23-3 footprint and 2.5 V output. For a different topology, the TL431 is an adjustable shunt reference with a 2.5 V internal reference, but its output is not fixed — it requires an external resistor divider, and its noise and drift specs are wider than the LM4040D25's."},{"question":"How does LM4040D25QDBZTG4 compare to the TL431 in terms of accuracy and noise?","answer":"The LM4040D25 has a fixed 2.5 V output with ±1% tolerance and 35 µVrms noise (10 Hz to 10 kHz). The TL431 is an adjustable shunt with a 2.5 V internal reference, but its typical tolerance is ±1% at best and its noise is not specified in the same bandwidth — the TL431's output noise is typically higher and depends on the external resistor network. For a clean, fixed 2.5 V rail, the LM4040D25 is the simpler, lower-noise choice."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4040D25QDBZTG4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM4040D25QDBZTG4 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}}