{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4040C25ILP","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4040C25ILP","canonicalUrl":"https://icboms.com/texas-instruments/LM4040C25ILP","factsUrl":"https://icboms.com/api/mcp/products/LM4040C25ILP","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM4040C25ILP precision shunt voltage reference, fixed 2.5V output, ±0.5% tolerance, 35µVrms noise, 80 µA cathode current, TO-92-3 through-hole package, -40°C to 85°C operating range.","salesMarkdown":"The Texas Instruments LM4040C25ILP is a precision shunt voltage reference that delivers a fixed 2.5V output with ±0.5% initial tolerance. It operates as a shunt (two-terminal) device, meaning it behaves like a Zener diode — you bias it with a cathode resistor from the supply, and the reference sinks the current needed to regulate the output voltage. The 35 µVrms noise (10 Hz to 10 kHz) and 100 ppm/°C temperature coefficient make it suitable for 12-bit ADC references, comparator thresholds, and power-supply monitoring in industrial control, test equipment, and sensor interfaces. ## Bias current and power — the shunt trade-off The LM4040C25ILP requires a minimum cathode current of 80 µA to maintain regulation, and can sink up to 15 mA continuously. That continuous current flow is the trade-off with shunt references: even with no load, the part draws bias current through the cathode resistor, which wastes power in battery-operated designs. For a 5V rail, a 31.25 kΩ series resistor sets the bias at 80 µA; at 15 mA output, the resistor drops to 167 Ω and dissipates 37.5 mW. ## Through-hole package — board fit and sourcing The TO-92-3 (TO-226AA) through-hole package is a standard 3-lead form factor with 0.100-inch pitch. It is breadboard-friendly and easy to hand-solder or socket, but takes more board area than a SOT-23 surface-mount reference.","metaTitle":"LM4040C25ILP Shunt Voltage Reference, 2.5V ±0.5%, TO-92-3","metaDescription":"Texas Instruments LM4040C25ILP precision shunt reference, fixed 2.5V output, ±0.5% tolerance, 35µVrms noise, TO-92-3 through-hole.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Bulk","Tolerance":"±0.5%","Output Type":"Fixed","Mounting Type":"Through Hole","Package / Case":"TO-226-3, TO-92-3 (TO-226AA)","Product Status":"Active","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":"TO-92-3","Temperature Coefficient":"100ppm/°C","Voltage - Output (Min/Fixed)":"2.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.4865","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM4040C25ILP/alternatives.json"},"ai":{"faq":[{"question":"What is the tolerance of LM4040C25ILP?","answer":"The initial tolerance is ±0.5% at 25°C."},{"question":"Can LM4040C25ILP replace LM4040C25IDBZ?","answer":"Both are the same 2.5V ±0.5% shunt reference from the LM4040 family. The C25ILP is in a TO-92-3 through-hole package; the C25IDBZ is in an SOT-23 surface-mount package. They are electrically identical but not pin-compatible — the board footprint and assembly process differ. Choose the package that matches your PCB layout and production method."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4040C25ILP","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM4040C25ILP 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}}