{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4040AIM3X-3.0/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4040AIM3X-3.0-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM4040AIM3X-3.0-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM4040AIM3X-3.0%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM4040AIM3X-3.0/NOPB, precision shunt voltage reference, 3V fixed output, ±0.1% tolerance, 35µVrms noise, SOT-23-3 package, -40°C to 85°C operating temperature, active lifecycle.","salesMarkdown":"The Texas Instruments LM4040AIM3X-3.0/NOPB is a precision shunt voltage reference that delivers a fixed 3V output with a tolerance of ±0.1% — tight enough for most 12-bit ADC references and comparator thresholds without trimming. It is a shunt (two-terminal) reference, so it behaves like a Zener diode: you bias it through a resistor from a higher supply rail, and the reference regulates the voltage across itself. ## Noise floor and temperature drift — the real-world limits That is clean enough for a 3V rail feeding a 16-bit SAR ADC if the reference input bandwidth is comparable. The temperature coefficient is 100 ppm/°C, so from 25°C to 85°C the output can shift by about 18 mV worst-case — something to budget for if the reference sits near a hot regulator or a power stage. ## Biasing and current budget This is a shunt reference with a maximum output current of 15 mA and a minimum cathode current of 67 µA. The bias resistor must be sized to supply the total current — the reference's own cathode current plus any load current — while keeping the shunt current above 67 µA to maintain regulation. For a 3.3V rail feeding a 1 mA load, a 20 Ω resistor works; for a 5V rail with a 10 mA load, the resistor drops to about 130 Ω. The power dissipation in the SOT-23-3 package limits the practical bias to about 10 mA continuous at 85°C ambient.","metaTitle":"LM4040AIM3X-3.0/NOPB Shunt Voltage Reference, 3V ±0.1%","metaDescription":"Texas Instruments LM4040AIM3X-3.0/NOPB precision shunt reference, 3V fixed output, ±0.1% tolerance, 35µVrms noise, SOT-23-3, active lifecycle.","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":"67 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)":"3V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.0300","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/db47fc1a31c797b619d88478be755429.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM4040AIM3X-3.0%2FNOPB/alternatives.json"},"ai":{"faq":[{"question":"What is the tolerance of LM4040AIM3X-3.0/NOPB?","answer":"The tolerance is ±0.1%."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4040AIM3X-3.0-NOPB","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM4040AIM3X-3.0-NOPB 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}}