{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4040C25IDCKT","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4040C25IDCKT","canonicalUrl":"https://icboms.com/texas-instruments/LM4040C25IDCKT","factsUrl":"https://icboms.com/api/mcp/products/LM4040C25IDCKT","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM4040C25IDCKT, precision shunt voltage reference, 2.5V fixed output, ±0.5% tolerance, 100 ppm/°C, 15 mA output, 80 µA cathode current, SC-70-5, -40°C to 85°C.","salesMarkdown":"## 2.5V shunt reference with ±0.5% initial accuracy The 100 ppm/°C temperature coefficient means the output voltage shifts by about 250 µV over a 25°C ambient swing — within tolerance for a 10-bit ADC reference but worth verifying against a 12-bit or higher system budget. As a shunt (two-terminal) reference, it behaves like a precision Zener diode: a series resistor from the supply sets the cathode current, and the reference regulates the voltage across itself. The 80 µA minimum cathode current and 15 mA maximum output current define the resistor value and the load range the part can support. The 35 µVrms noise (10 Hz to 10 kHz) is low enough that a 12-bit ADC at 2.5V full-scale sees roughly 1 LSB of reference noise — acceptable for most industrial data acquisition, but a lower-noise reference (e.g., 10 µVrms) would be preferred for 16-bit or higher systems. The 100 ppm/°C drift is the dominant error source over temperature. From 25°C to 85°C the voltage can shift up to 15 mV (0.6% of 2.5V), which exceeds the ±0.5% initial tolerance. If the system calibrates at room temperature and operates across the full range, the drift budget must be accounted for in the error stack-up. ## SC-70-5 footprint and sourcing posture The SC-70-5 (SOT-353) package is a 5-lead surface-mount footprint with 0.65 mm pitch. The small body (2.1 mm × 2.0 mm) saves board area but limits power dissipation — the shunt current plus load current must stay within the package thermal limits. The supplier device package is SC-70-5.","metaTitle":"TI LM4040C25IDCKT 2.5V Shunt Reference, ±0.5%, SC-70-5","metaDescription":"Texas Instruments LM4040C25IDCKT precision 2.5V shunt voltage reference. ±0.5% tolerance, 100 ppm/°C drift, -40°C to 85°C. Active production, 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":"$1.1600","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM4040C25IDCKT/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between LM4040C25IDCKT and LM4040C25IDBZ?","answer":"Both are 2.5V shunt references with the same electrical specifications. The difference is the package: LM4040C25IDCKT is in SC-70-5 (SOT-353), while LM4040C25IDBZ is in SOT-23-3. The SC-70-5 is smaller but has a different pinout and footprint — they are not drop-in replacements. Verify the PCB land pattern before substituting."},{"question":"What package is LM4040C25IDCKT in?","answer":"The device is supplied in a 5-pin SC-70-5 package, also known as SOT-353. The supplier device package is SC-70-5. It is a surface-mount package with 0.65 mm lead pitch."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4040C25IDCKT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM4040C25IDCKT 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}}