{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4040D82IDBZT","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4040D82IDBZT","canonicalUrl":"https://icboms.com/texas-instruments/LM4040D82IDBZT","factsUrl":"https://icboms.com/api/mcp/products/LM4040D82IDBZT","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM4040D82IDBZT precision shunt voltage reference, fixed 8.192 V output, ±1% tolerance, 15 mA output, 115 µA cathode current, SOT-23-3, -40°C to 85°C.","salesMarkdown":"It is part of the LM4040 family, a widely used series of low-power shunt references available in multiple voltage options and tolerance grades. The shunt topology means it behaves like a two-terminal Zener diode — it regulates by shunting current through the cathode to ground, making it suitable for series or shunt configurations in precision bias supplies, ADC/DAC reference inputs, and comparator threshold circuits. ## Output current and cathode current — the operating envelope The LM4040D82IDBZT is rated for a maximum output current of 15 mA and a minimum cathode current of 115 µA. The shunt regulator must be biased with a series resistor that supplies at least 115 µA through the cathode to maintain regulation; below that threshold the output voltage may drift. The 15 mA ceiling limits the load the reference can drive directly — for higher current demands, a buffer amplifier is needed. ## Noise performance and application fit Wideband noise from 10 Hz to 10 kHz is specified at 130 µVrms. For a 8.192 V reference, that is roughly 16 ppm rms — adequate for general-purpose precision analog circuits but not low-noise enough for high-resolution sigma-delta converters without additional filtering. The shunt architecture inherently has lower noise than bandgap references at similar quiescent current, which is a practical advantage in battery-powered instrumentation where every microamp counts. The SOT-23-3 footprint is shared across the entire LM4040 voltage range, so a different voltage variant can be substituted without a PCB change.","metaTitle":"LM4040D82IDBZT Texas Instruments Shunt Reference","metaDescription":"Texas Instruments LM4040D82IDBZT precision shunt voltage reference, fixed 8.192 V output, ±1% tolerance, 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); Cut Tape (CT)","Tolerance":"±1%","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"TO-236-3, SC-59, SOT-23-3","Product Status":"Active","Reference Type":"Shunt","Voltage - Input":"-","lifecycle_stage":"eol_hot","Current - Output":"15 mA","Current - Supply":"-","Current - Cathode":"115 µA","Base Product Number":"LM4040","Noise - 0.1Hz to 10Hz":"-","Noise - 10Hz to 10kHz":"130µVrms","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"SOT-23-3","Temperature Coefficient":"150ppm/°C","Voltage - Output (Min/Fixed)":"8.192V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.3600","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM4040D82IDBZT/alternatives.json"},"ai":{"faq":[{"question":"Can the LM4040D82IDBZT be used as a replacement for the LM4040A82?","answer":"The LM4040D82IDBZT and LM4040A82 are pin-compatible in the same SOT-23-3 footprint, but the LM4040A82 offers a tighter ±0.1% initial tolerance versus the D-grade's ±1%. If your circuit requires better than 1% accuracy, the A-grade is the correct choice; otherwise the D-grade is a drop-in substitute for the same voltage."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4040D82IDBZT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM4040D82IDBZT 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}}