{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4040A82IDBZR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4040A82IDBZR","canonicalUrl":"https://icboms.com/texas-instruments/LM4040A82IDBZR","factsUrl":"https://icboms.com/api/mcp/products/LM4040A82IDBZR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM4040A82IDBZR precision shunt voltage reference, fixed 8.192 V output, ±0.1% tolerance, 100 ppm/°C temperature coefficient, 15 mA output current, SOT-23-3 package, -40°C to 85°C.","salesMarkdown":"## Precision shunt reference for 8.192 V rails The Texas Instruments LM4040A82IDBZR is a precision shunt voltage reference delivering a fixed 8.192 V output with a ±0.1% initial tolerance. This specific voltage is commonly chosen as a reference for 12-bit and 14-bit ADCs where the full-scale input matches 8.192 V, or as a stable bias for precision analog circuits. 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, making it simple to use but thermally dependent on the cathode current. ## Temperature drift and noise budget Noise from 10 Hz to 10 kHz is specified at 130 µVrms, which is low enough for a 12-bit ADC reference but may need a bypass cap for a 14-bit or higher converter. ## Current handling and shunt operation The device can sink up to 15 mA continuously, with a minimum cathode current of 110 µA to maintain regulation. The series resistor value must be chosen so that the cathode current stays within this window across the full load and supply variation — a common mistake is undersizing the resistor, which starves the reference and drops the output voltage.","metaTitle":"LM4040A82IDBZR Shunt Reference, ±0.1% Tolerance, 8.192 V","metaDescription":"Texas Instruments LM4040A82IDBZR precision shunt voltage reference, fixed 8.192 V output, ±0.1% tolerance, 100 ppm/°C drift, SOT-23-3, active production","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":"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":"110 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":"100ppm/°C","Voltage - Output (Min/Fixed)":"8.192V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.7280","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM4040A82IDBZR/alternatives.json"},"ai":{"faq":[{"question":"What is the tolerance of LM4040A82IDBZR?","answer":"The initial tolerance is ±0.1%, which is a precision-grade specification suitable for reference and calibration applications."},{"question":"What is the closest pin-compatible alternative to LM4040A82IDBZR?","answer":"Within the LM4040 family, the LM4040A82IDBZR is the ±0.1% tolerance variant at 8.192 V. Other tolerance grades (LM4040B82IDBZR at ±0.2%) are pin-compatible and share the same SOT-23-3 footprint, allowing a BOM swap without PCB change if the system can accept wider tolerance."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4040A82IDBZR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM4040A82IDBZR 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}}