{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4040A50IDCKR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4040A50IDCKR","canonicalUrl":"https://icboms.com/texas-instruments/LM4040A50IDCKR","factsUrl":"https://icboms.com/api/mcp/products/LM4040A50IDCKR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM4040A50IDCKR precision shunt voltage reference, fixed 5V output, ±0.1% tolerance, 100 ppm/°C drift, 15 mA output, SC-70-5 package, -40°C to 85°C.","salesMarkdown":"## Fixed 5V shunt reference with tight initial tolerance This is the A-grade variant in the LM4040 family, offering the tightest tolerance bin for applications where the reference voltage directly sets the accuracy of an ADC or DAC conversion. The shunt topology means it behaves like a two-terminal Zener diode — it sinks current from the supply through a series resistor, regulating the voltage across its terminals. That makes it simple to bias from any rail above 5V, with the cathode current set by the resistor value. ## Temperature drift and noise floor For a 12-bit ADC with a 5V reference, that's about 4 LSBs of drift — acceptable for most industrial sensing but worth derating if the system targets 14-bit or better accuracy across temperature. That is low enough for a 12-bit system but may need a post-filter if the reference feeds a high-resolution sigma-delta converter. ## Package, footprint, and bias conditions Housed in a 5-pin SC-70-5 (SOT-353) package, this part occupies minimal board area — roughly 2.0 mm × 2.1 mm. Minimum cathode current is 95 µA, and maximum output current is 15 mA. The LM4040 family spans multiple voltage options and tolerance grades; if a tighter drift or lower noise is needed, the AEC-qualified or higher-grade variants in the same family are worth evaluating.","metaTitle":"LM4040A50IDCKR 5V Shunt Reference, ±0.1% Tolerance, SC-70-5","metaDescription":"Texas Instruments LM4040A50IDCKR precision 5V shunt voltage reference. ±0.1% tolerance, 100 ppm/°C drift, 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":"±0.1%","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":"95 µA","Base Product Number":"LM4040","Noise - 0.1Hz to 10Hz":"-","Noise - 10Hz to 10kHz":"80µVrms","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"SC-70-5","Temperature Coefficient":"100ppm/°C","Voltage - Output (Min/Fixed)":"5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.8315","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM4040A50IDCKR/alternatives.json"},"ai":{"faq":[{"question":"Is LM4040A50IDCKR RoHS compliant?","answer":"The part is listed as RoHS compliant based on its product classification and package materials; no non-compliance flag appears in the component record."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4040A50IDCKR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM4040A50IDCKR 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}}