{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4040A20IDBZT","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4040A20IDBZT","canonicalUrl":"https://icboms.com/texas-instruments/LM4040A20IDBZT","factsUrl":"https://icboms.com/api/mcp/products/LM4040A20IDBZT","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM4040A20IDBZT, shunt voltage reference, fixed 2.048 V output, ±0.1% tolerance, 35 µVrms noise, 80 µA cathode current, SOT-23-3 package, -40°C to 85°C.","salesMarkdown":"## 2.048 V shunt reference with ±0.1% initial tolerance The LM4040A20IDBZT is a shunt voltage reference with a fixed 2.048 V output and ±0.1% tolerance. The shunt architecture means it behaves like a two-terminal Zener: it regulates by shunting current through the cathode to ground. Minimum cathode current is 80 µA, and the device can sink up to 15 mA while maintaining regulation — wide enough to supply the reference input of most SAR ADCs and still leave headroom for the bias resistor. ## Noise floor and temperature drift Output noise is specified at 35 µVrms over the 10 Hz to 10 kHz band — low enough that it won't dominate the ADC's own noise in a 12-bit system at 2.048 V full scale (1 LSB ≈ 500 µV). The temperature coefficient is 100 ppm/°C, so a 50°C swing shifts the output by about 10 mV — acceptable for most industrial control loops but worth derating if the reference sits near a hot regulator or power stage.","metaTitle":"LM4040A20IDBZT Shunt Voltage Reference, ±0.1%, 2.048 V","metaDescription":"Texas Instruments LM4040A20IDBZT precision shunt reference: 2.048 V output, ±0.1% tolerance, 35 µVrms noise, -40°C to 85°C. Active lifecycle, 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); 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":"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":"$4.3100","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM4040A20IDBZT/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4040A20IDBZT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM4040A20IDBZT 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}}