{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4040CIM3X-2.0","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4040CIM3X-2.0","canonicalUrl":"https://icboms.com/texas-instruments/LM4040CIM3X-2.0","factsUrl":"https://icboms.com/api/mcp/products/LM4040CIM3X-2.0","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM4040 series precision shunt voltage reference, LM4040CIM3X-2.0, fixed 2.048 V output, ±0.5% tolerance, 100 ppm/°C drift, 15 mA output, SOT-23-3 package, -40°C to 85°C.","salesMarkdown":"The LM4040CIM3X-2.0 is a precision shunt voltage reference from the LM4040 family, delivering a fixed 2.048 V output with ±0.5% initial tolerance. That 2.048 V is a deliberate choice for ratiometric ADC references — it maps cleanly to a 0-to-2.048 V input range, which is common in 12-bit and 16-bit converters running on a 3.3 V rail. The shunt topology means it behaves like a two-terminal Zener: you set the current through it with a single series resistor, and the part regulates the voltage across itself. That resistor value depends on the supply voltage and the load current the reference has to sink — the 15 mA output capability gives you headroom for driving multiple ADC reference inputs or a buffer stage. ## Temperature drift and noise — the real-world stability limits That is fine for a 12-bit system where 1 LSB at 2.048 V is 0.5 mV — you have some margin. For a 16-bit ADC with 31 µV LSBs, that drift eats into your error budget, and you would want a lower-tc part like the LM4040A with 30 ppm/°C. ## Package and footprint — SOT-23-3, tape and reel The part comes in a SOT-23-3 package (TO-236-3 / SC-59 equivalent), surface-mount, supplied on Tape & Reel. The three-pin footprint is standard: cathode, anode, and no-connect. The 65 µA minimum cathode current means the series resistor can be sized for low quiescent draw in battery-powered designs — the reference itself does not waste much current.","metaTitle":"LM4040CIM3X-2.0 Shunt Reference, 2.048 V ±0.5%, SOT-23-3","metaDescription":"Texas Instruments LM4040CIM3X-2.0 precision shunt voltage reference: 2.048 V fixed output, ±0.5% tolerance, 100 ppm/°C drift, SOT-23-3.","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":"65 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":"$1.4800","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/8c40cf163b5cda64fd88ad5c9f25fe6d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM4040CIM3X-2.0/alternatives.json"},"ai":{"faq":[{"question":"What is the tolerance of LM4040CIM3X-2.0?","answer":"The initial tolerance is ±0.5% at 25°C. That is the 'C' grade in the LM4040 family — the 'A' grade offers ±0.1%, the 'B' grade ±0.2%."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4040CIM3X-2.0","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM4040CIM3X-2.0 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}}