{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4040C25IDCKR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4040C25IDCKR","canonicalUrl":"https://icboms.com/texas-instruments/LM4040C25IDCKR","factsUrl":"https://icboms.com/api/mcp/products/LM4040C25IDCKR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM4040C25IDCKR precision shunt voltage reference, fixed 2.5V output, ±0.5% tolerance, 15 mA output, 80 µA cathode current, 35 µVrms noise, SC-70-5 package, -40°C to 85°C.","salesMarkdown":"## Fixed 2.5V shunt reference in SC-70-5 The Texas Instruments LM4040C25IDCKR is a precision shunt voltage reference delivering a fixed 2.5V output with ±0.5% initial tolerance. It is part of the LM4040 series, a widely used family of low-power, high-accuracy references for ADC biasing, comparator thresholds, and power supply supervision. The SC-70-5 package (also known as SOT-353) measures roughly 2.0 mm × 2.1 mm, making it a fit for dense PCB layouts where board area is at a premium. The shunt topology means it behaves like a two-terminal Zener — it requires a series resistor from the supply and sinks current to regulate the output voltage. ## Tolerance, noise, and temperature drift The ±0.5% tolerance covers initial accuracy at 25°C — enough margin for 8-bit ADC references and most comparator-based threshold circuits. This is low enough for most data converter references in industrial control and instrumentation, though a low-pass filter at the reference output helps in noise-sensitive signal chains. ## Cathode current and output drive The LM4040C25IDCKR sinks a minimum cathode current of 80 µA and can deliver up to 15 mA to the load. The 80 µA floor sets the minimum bias current through the series resistor — design the resistor value so that at minimum supply voltage the reference sees at least 80 µA plus the load current. The 15 mA ceiling limits how many ADC inputs or comparator nodes it can drive directly; beyond that, buffer with an op-amp. No direct pin-compatible replacement is needed at this time.","metaTitle":"LM4040C25IDCKR Shunt Voltage Reference, 2.5V ±0.5%","metaDescription":"TI LM4040C25IDCKR precision shunt reference, fixed 2.5V output, ±0.5% tolerance, 35µVrms noise, SC-70-5 package.","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); Cut Tape (CT)","Tolerance":"±0.5%","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"5-TSSOP, SC-70-5, SOT-353","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":"SC-70-5","Temperature Coefficient":"100ppm/°C","Voltage - Output (Min/Fixed)":"2.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.9800","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM4040C25IDCKR/alternatives.json"},"ai":{"faq":[{"question":"What package does LM4040C25IDCKR use?","answer":"It is supplied in an SC-70-5 package (also known as SOT-353 or 5-TSSOP). The supplier device package is SC-70-5."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4040C25IDCKR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM4040C25IDCKR 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}}