{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4051AIM3X-1.2/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4051AIM3X-1.2-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM4051AIM3X-1.2-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM4051AIM3X-1.2%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM4051AIM3X-1.2/NOPB precision shunt voltage reference, fixed 1.225 V output, ±0.1% tolerance, 50 ppm/°C temperature coefficient, 65 µA cathode current, SOT-23-3 package.","salesMarkdown":"## Precision shunt reference in a SOT-23-3 The Texas Instruments LM4051AIM3X-1.2/NOPB is a precision shunt voltage reference delivering a fixed 1.225 V output with ±0.1% initial tolerance. The ±0.1% tolerance at 25°C sets the initial accuracy floor for an ADC reference or comparator threshold — a 1.225 V nominal output stays within 1.223 V to 1.227 V at room temperature. For a 12-bit ADC with a 2.5 V span, that drift is under 1 LSB; for 16-bit systems it starts to eat into the noise budget and may require a calibration step. ## Shunt topology — cathode current and output drive As a shunt reference, the LM4051 sinks current through the cathode to maintain regulation. The minimum cathode current is 65 µA — below that the reference drops out of regulation. Maximum continuous output current is 12 mA, which covers biasing a single ADC reference input or a comparator string, but not multiple heavy loads. The 20 µVrms noise (10 Hz to 10 kHz) is low enough for most 12- to 14-bit SAR ADC applications without additional filtering. ## SOT-23-3 package and surface-mount assembly Housed in a three-lead SOT-23-3 (TO-236-3, SC-59 equivalent), this part is a drop-in for standard shunt reference footprints. The surface-mount package suits automated pick-and-place and reflow assembly. No exposed pad — thermal performance depends on the copper area on the cathode pin trace, so keep the trace short and wide if the part is sinking near the 12 mA maximum.","metaTitle":"LM4051AIM3X-1.2/NOPB Shunt Voltage Reference, 1.225 V, ±0.1%","metaDescription":"Texas Instruments LM4051AIM3X-1.2/NOPB precision shunt reference, fixed 1.225 V output, ±0.1% tolerance, 50 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":"±0.1%","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":"12 mA","Current - Supply":"-","Current - Cathode":"65 µA","Base Product Number":"LM4051","Noise - 0.1Hz to 10Hz":"-","Noise - 10Hz to 10kHz":"20µVrms","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"SOT-23-3","Temperature Coefficient":"50ppm/°C","Voltage - Output (Min/Fixed)":"1.225V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.6920","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/e499b7cd54f3272232db27a8df268948.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM4051AIM3X-1.2%2FNOPB/alternatives.json"},"ai":{"faq":[{"question":"Is LM4051AIM3X-1.2/NOPB obsolete or active?","answer":"It is active — Texas Instruments lists the product status as Active. No end-of-life notice or last-time-buy has been issued."},{"question":"What is the tolerance of LM4051AIM3X-1.2/NOPB?","answer":"Initial tolerance is ±0.1%."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4051AIM3X-1.2-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/LM4051AIM3X-1.2-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}}