{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4040C20QDBZRG4","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4040C20QDBZRG4","canonicalUrl":"https://icboms.com/texas-instruments/LM4040C20QDBZRG4","factsUrl":"https://icboms.com/api/mcp/products/LM4040C20QDBZRG4","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM4040C20QDBZRG4, precision shunt voltage reference, fixed 2.048 V output, ±0.5% tolerance, 100 ppm/°C, 15 mA output, SOT-23-3, -40°C to 85°C.","salesMarkdown":"## Fixed 2.048 V shunt reference — the BOM-fit anchor The Texas Instruments LM4040C20QDBZRG4 is a precision shunt voltage reference delivering a fixed 2.048 V output with ±0.5% initial tolerance. It is designed for bias and reference circuits in ADC/DAC signal chains, power-supply feedback loops, and portable instrumentation where a stable, low-drift voltage is needed without a series regulator. ## ±0.5% tolerance and 100 ppm/°C drift — what they mean for accuracy The ±0.5% initial tolerance sets the absolute accuracy at 25 °C; a 2.048 V reference will be between 2.037 V and 2.059 V at first power-up. ## SOT-23-3 package — footprint and thermal reality Housed in a three-pin SOT-23-3 (also listed as TO-236-3 / SC-59), the part occupies minimal board area. The shunt architecture means the cathode current (80 µA minimum) sets the operating point; the 15 mA maximum output current is derated by the package's thermal resistance — in practice, keep the cathode resistor sized so the device dissipates under 150 mW at 85°C ambient to stay within the SOT-23-3's power capability.","metaTitle":"LM4040C20QDBZRG4 Shunt Voltage Reference","metaDescription":"Texas Instruments LM4040C20QDBZRG4 precision shunt reference, fixed 2.048 V output, ±0.5% tolerance, 100 ppm/°C drift, SOT-23-3 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)","Tolerance":"±0.5%","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"TO-236-3, SC-59, SOT-23-3","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":"SOT-23-3","Temperature Coefficient":"100ppm/°C","Voltage - Output (Min/Fixed)":"2.048V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM4040C20QDBZRG4/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4040C20QDBZRG4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM4040C20QDBZRG4 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}}