{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4040B25IDBZRG4","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4040B25IDBZRG4","canonicalUrl":"https://icboms.com/texas-instruments/LM4040B25IDBZRG4","factsUrl":"https://icboms.com/api/mcp/products/LM4040B25IDBZRG4","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM4040B25IDBZRG4 precision shunt voltage reference, fixed 2.5 V output, ±0.2% tolerance, 100 ppm/°C temperature coefficient, 15 mA output current, SOT-23-3 package, -40°C to 85°C operating range.","salesMarkdown":"## 2.5 V shunt reference with ±0.2% initial accuracy The Texas Instruments LM4040B25IDBZRG4 is a precision shunt voltage reference that delivers a fixed 2.5 V output with a ±0.2% initial tolerance. ## 100 ppm/°C drift over the industrial temperature band That means the 2.5 V output can shift by roughly 3 mV worst-case from 25 °C to either extreme — a figure that matters if the reference is feeding a 12-bit ADC where 1 LSB at 2.5 V is about 610 µV. The 35 µVrms noise (10 Hz to 10 kHz) is low enough not to degrade the ADC's SNR in most precision signal-chain designs. ## Shunt architecture — cathode current and load limits As a shunt reference, the LM4040B25IDBZRG4 sinks current through the cathode to regulate the output. The minimum cathode current is 80 µA; the maximum continuous output current is 15 mA. The design rule: the series resistor from the supply must deliver enough current to cover both the load and the 80 µA minimum, but stay below the 15 mA ceiling when the load is at its minimum. That 80 µA quiescent floor makes this part suitable for battery-powered circuits where every microamp counts. ## SOT-23-3 footprint and supply posture The part comes in a standard SOT-23-3 surface-mount package (TO-236-3 / SC-59 equivalent).","metaTitle":"TI LM4040B25IDBZRG4 Shunt Voltage Reference, 2.5V ±0.2%","metaDescription":"Texas Instruments LM4040B25IDBZRG4 precision shunt reference, 2.5V fixed output, ±0.2% tolerance, 100ppm/°C drift, SOT-23-3, -40°C to 85°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":"±0.2%","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":"100ppm/°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/LM4040B25IDBZRG4/alternatives.json"},"ai":{"faq":[{"question":"What package does the LM4040B25IDBZRG4 come in?","answer":"It is supplied in a SOT-23-3 surface-mount package (also listed as TO-236-3 or SC-59). The shipping form is Tape & Reel."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4040B25IDBZRG4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM4040B25IDBZRG4 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}}