{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4040AIZ-3.0/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4040AIZ-3.0-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM4040AIZ-3.0-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM4040AIZ-3.0%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM4040AIZ-3.0/NOPB, precision shunt voltage reference, fixed 3V output, ±0.1% tolerance, 35 µVrms noise, 15 mA output, TO-92-3 through-hole package, -40°C to 85°C.","salesMarkdown":"## 3V shunt reference with ±0.1% initial accuracy The Texas Instruments LM4040AIZ-3.0/NOPB is a precision shunt voltage reference delivering a fixed 3V output with a tight ±0.1% initial tolerance. This is the spec that decides whether the reference holds the ADC or DAC transfer function within budget without a trim pot. ## Noise floor and temperature drift Output noise is specified at 35 µVrms over the 10 Hz to 10 kHz band, which keeps the reference from adding jitter to a 12-bit or 14-bit conversion chain. ## Cathode current and shunt operation As a shunt reference, this part regulates by sinking current through the cathode. The minimum cathode current is 67 µA, and the maximum continuous output current is 15 mA. That means the series resistor from the supply rail must be sized to deliver at least 67 µA to the cathode at all times while keeping the total current below 15 mA under worst-case load. TI no longer manufactures this specific variant. ## TO-92 package — rework and retrofit The TO-92-3 through-hole package is a three-lead inline format with 0.100-inch lead spacing. It drops into existing boards with plated through-holes and is straightforward to hand-solder or wave-solder. No hot-air rework needed — just a soldering iron and a desoldering tool if the old part comes out.","metaTitle":"LM4040AIZ-3.0/NOPB Shunt Voltage Reference, ±0.1%, 3V, TO-92","metaDescription":"Texas Instruments LM4040AIZ-3.0/NOPB precision shunt reference, 3V fixed output, ±0.1% tolerance, 35 µVrms noise, TO-92 package.","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":"±0.1%","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":"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":"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/LM4040AIZ-3.0%2FNOPB/alternatives.json"},"ai":{"faq":[{"question":"What is the tolerance of LM4040AIZ-3.0/NOPB?","answer":"The initial output voltage tolerance is ±0.1%, which is the tightest grade in the LM4040 precision family."},{"question":"Can LM4040AIZ-3.0/NOPB be used as a 3V reference?","answer":"Yes. The fixed output voltage is 3V."},{"question":"What is the cathode current of LM4040AIZ-3.0/NOPB?","answer":"The minimum cathode current is 67 µA. The series resistor must be chosen to keep the cathode current within this window across all operating conditions."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4040AIZ-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/LM4040AIZ-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}}