{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4040BIM3X-3.0","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4040BIM3X-3.0","canonicalUrl":"https://icboms.com/texas-instruments/LM4040BIM3X-3.0","factsUrl":"https://icboms.com/api/mcp/products/LM4040BIM3X-3.0","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM4040 series precision shunt voltage reference, LM4040BIM3X-3.0, fixed 3.0 V output, ±0.2% tolerance, 35 µVrms noise, 15 mA output, SOT-23-3 surface-mount package, -40°C to 85°C.","salesMarkdown":"## 3.0 V shunt reference — precision floor for the analog rail The Texas Instruments LM4040BIM3X-3.0 is a precision shunt voltage reference delivering a fixed 3.0 V output with ±0.2% initial tolerance — tight enough to set the reference for a 12-bit ADC without external trimming. It is built around the shunt (two-terminal) topology, so it behaves like a Zener diode: you bias it through a series resistor from a higher supply rail, and it sinks whatever current is needed to hold the output at 3.0 V. This part is from the LM4040 family, a widely-used series of low-power, precision references in the SOT-23-3 footprint. The shunt architecture means it can be configured for either positive or negative output voltages relative to a floating reference point — useful in split-supply or level-shifting circuits. The ±0.2% tolerance at 25 °C sets the absolute accuracy floor. For a 3.0 V reference, that is ±6 mV — adequate for 8- and 10-bit ADCs, and marginal for 12-bit systems that need better than 1 LSB at 3.3 V full-scale. Output current is rated at 15 mA maximum. The minimum cathode current is 67 µA, which sets the floor for the bias resistor calculation. For 16-bit or higher resolution, a bypass capacitor at the output pin (typically 0.1 µF to 1 µF) will knock down the wideband noise floor further. ## Obsolete — sourcing path through independent distribution This part is now available exclusively through the independent distribution channel — new-old-stock and surplus inventory that has already been manufactured. A design review is recommended before substituting.","metaTitle":"LM4040BIM3X-3.0 Shunt Voltage Reference, 3V ±0.2%, SOT-23-3","metaDescription":"Texas Instruments LM4040BIM3X-3.0 precision shunt reference, 3.0 V fixed output, ±0.2% tolerance, 35 µVrms noise, SOT-23-3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Tolerance":"±0.2%","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"TO-236-3, SC-59, SOT-23-3","Product Status":"Obsolete","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":"$1.6800","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/8c40cf163b5cda64fd88ad5c9f25fe6d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM4040BIM3X-3.0/alternatives.json"},"ai":{"faq":[{"question":"Is the LM4040BIM3X-3.0 obsolete and what are the last-time buy options?","answer":"Yes, the LM4040BIM3X-3.0 is listed as Obsolete with no active last-time-buy window from the manufacturer. The only procurement path is through surplus and new-old-stock inventory in the independent channel."},{"question":"What is the tolerance of the LM4040BIM3X-3.0 voltage reference?","answer":"The initial tolerance is ±0.2%, which corresponds to ±6 mV at the 3.0 V output."},{"question":"Where can I find the LM4040BIMX3-3.0 datasheet?","answer":"The datasheet for the LM4040 family is available from Texas Instruments. The base product number is LM4040, and the full document covers all tolerance grades and voltage options in the series."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4040BIM3X-3.0","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM4040BIM3X-3.0 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}}