{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4040CIZ-3.0/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4040CIZ-3.0-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM4040CIZ-3.0-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM4040CIZ-3.0%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM4040CIZ-3.0/NOPB, precision shunt voltage reference, fixed 3V output, ±0.5% tolerance, 35µVrms noise, 100ppm/°C drift, 15 mA output, TO-92-3 through-hole, -40°C to 85°C.","salesMarkdown":"## 3.0 V fixed shunt reference in a TO-92-3 The Texas Instruments LM4040CIZ-3.0/NOPB is a precision shunt voltage reference that delivers a fixed 3 V output with ±0.5% initial tolerance. Output noise is specified at 35 µVrms over a 10 Hz to 10 kHz bandwidth, and the temperature coefficient is 100 ppm/°C — both figures that matter when the reference sits ahead of a 12-bit or 14-bit converter in a temperature-varying environment. If your pick-and-place line is SMT-only, the through-hole body will require a separate hand-solder or wave-solder step, adding process cost. Consider a pin-compatible SMT alternative in the LM4040 family if board-space and assembly flow allow. ## Key parametric limits for BOM fit The shunt reference can sink up to 15 mA of output current, with a minimum cathode current of 65 µA to maintain regulation. With a 100 ppm/°C drift and ±0.5% initial tolerance, the total error budget across temperature is roughly ±0.5% ± (100 ppm × ΔT). For a 3 V output, that is about ±15 mV at 25°C, plus another ±30 mV over a 60°C swing — enough to flag if your ADC reference input expects better than 1% total accuracy.","metaTitle":"TI LM4040CIZ-3.0/NOPB Shunt Voltage Reference, 3V ±0.5%","metaDescription":"Texas Instruments LM4040CIZ-3.0/NOPB precision shunt reference, fixed 3V output, ±0.5% tolerance, 35µVrms noise, TO-92-3 through-hole.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Bulk","Tolerance":"±0.5%","Output Type":"Fixed","Mounting Type":"Through Hole","Package / Case":"TO-226-3, TO-92-3 (TO-226AA)","Product Status":"Obsolete","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":"TO-92-3","Temperature Coefficient":"100ppm/°C","Voltage - Output (Min/Fixed)":"3V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/8c40cf163b5cda64fd88ad5c9f25fe6d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM4040CIZ-3.0%2FNOPB/alternatives.json"},"ai":{"faq":[{"question":"What is the recommended replacement for LM4040CIZ-3.0/NOPB?","answer":"No official replacement or successor order code is listed by Texas Instruments for this part. For a pin-compatible SMT alternative, consider other devices in the LM4040 family with the same 3 V output and ±0.5% tolerance, but verify the package (e.g., SOT-23) and pinout against your board layout."},{"question":"What is the tolerance of LM4040CIZ-3.0/NOPB?","answer":"The initial tolerance is ±0.5% at 25°C. Combined with the 100 ppm/°C temperature coefficient, the total accuracy over temperature depends on the operating range."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4040CIZ-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/LM4040CIZ-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}}