{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4040D25IDBZRG4","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4040D25IDBZRG4","canonicalUrl":"https://icboms.com/texas-instruments/LM4040D25IDBZRG4","factsUrl":"https://icboms.com/api/mcp/products/LM4040D25IDBZRG4","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM4040D25IDBZRG4, shunt voltage reference, 2.5V fixed output, ±1% tolerance, 35µVrms noise, 150ppm/°C drift, SOT-23-3, -40°C to +85°C.","salesMarkdown":"## 2.5 V shunt reference with ±1% initial accuracy The reference type is shunt, meaning it behaves as a two-terminal Zener-like device — the load and a bias resistor set the operating current, and the reference regulates by shunting current through its cathode to ground. ## Noise, drift, and temperature range — bench-fit check That drift matters if the reference sits in an outdoor telecom or factory automation enclosure where the ambient swings tens of degrees. The 85°C ceiling is fine for a PCB inside a ventilated cabinet; for an under-hood or engine-bay install you would step up to the automotive-grade LM4040 variant. ## Current limits and bias resistor sizing The shunt reference can sink up to 15 mA of output current — that is the total current through the reference plus the load. Minimum cathode current is 80 µA, which sets the floor for the bias resistor value. For a typical 5 V rail feeding a 2.5 V reference, the bias resistor sees about 2.5 V across it; to stay above 80 µA the resistor must be less than 31 kΩ. That is a wide margin in most designs. This part is a standard catalog item from Texas Instruments, widely available through distribution.","metaTitle":"Texas Instruments LM4040D25IDBZRG4 Shunt Voltage Reference","metaDescription":"TI LM4040D25IDBZRG4 precision shunt reference: 2.5V fixed output, ±1% tolerance, 35µVrms noise, -40°C to +85°C, SOT-23-3.","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~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":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM4040D25IDBZRG4/alternatives.json"},"ai":{"faq":[{"question":"Is LM4040D25IDBZRG4 obsolete or active?","answer":"It is Active — no discontinuation or last-time-buy has been announced. Production continues through Texas Instruments."},{"question":"Is LM4040D25IDBZRG4 RoHS compliant?","answer":"Yes, the part is RoHS compliant as indicated by the 'G4' suffix in the order code. No RoHS exemption flags are associated with this device."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4040D25IDBZRG4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM4040D25IDBZRG4 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}}