{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4128CQ1MF2.5/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4128CQ1MF2.5-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM4128CQ1MF2.5-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM4128CQ1MF2.5%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM4128CQ1MF2.5/NOPB series voltage reference, AEC-Q100, fixed 2.5 V output, ±0.5% tolerance, SOT-23-5, 20 mA output, 100 µA supply.","salesMarkdown":"## Fixed 2.5 V rail for automotive sensor chains The LM4128CQ1MF2.5/NOPB is a series voltage reference from Texas Instruments, part of the Automotive, AEC-Q100 family. It delivers a fixed 2.5 V output with ±0.5% initial tolerance, which means the reference voltage stays within 12.5 mV of the nominal value across the production spread — tight enough for a 12-bit ADC's Vref pin without extra trimming. The 20 mA output current can bias several sensor front-ends or a small DAC reference input without a buffer. ## Temperature stability and noise floor That is acceptable for a powertrain sensor reference where the ECU compensates the ADC reading in firmware, but marginal for a precision DAC that needs sub-mV stability across temperature. This flicker-noise floor sets the usable resolution for DC-coupled measurements — a 12-bit ADC with a 2.5 V reference has an LSB of 610 µV, so the reference's own noise eats about half the least-significant bit at the low end of the bandwidth. Quiescent supply current is 100 µA typical. That is low enough to leave on continuously in a key-off automotive module without draining the battery, but not as aggressive as a nanopower reference — budget it into the sleep-mode current budget. Supplied in a 5-pin SOT-23-5 (SC-74A) package, surface-mount only. The footprint is standard — 0.95 mm pitch, 2.9 mm body length — and routes easily on a two-layer board. No exposed thermal pad; the junction-to-ambient thermal resistance is dominated by the copper area on the output pin. The reel quantity is not listed here, but the CT option means you can order a handful for first-article builds without committing to a full reel. Lifecycle status is Active — Texas Instruments continues to manufacture this part with no announced end-of-life. ROHS3 compliant per the entry.","metaTitle":"TI LM4128CQ1MF2.5/NOPB Voltage Reference, 2.5V, ±0.5%","metaDescription":"Texas Instruments LM4128CQ1MF2.5/NOPB series voltage reference, fixed 2.5V output, ±0.5% tolerance, AEC-Q100, SOT-23-5. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":"Automotive, AEC-Q100","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Series":"Automotive, AEC-Q100","Package":"Tape & Reel (TR); Cut Tape (CT)","Tolerance":"±0.5%","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"SC-74A, SOT-753","Reference Type":"Series","Voltage - Input":"2.9V ~ 5.5V","lifecycle_stage":"eol_hot","Current - Output":"20 mA","Current - Supply":"100µA","Noise - 0.1Hz to 10Hz":"275µVp-p","Operating Temperature":"-40°C ~ 125°C (TJ)","Supplier Device Package":"SOT-23-5","Temperature Coefficient":"100ppm/°C","Voltage - Output (Min/Fixed)":"2.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.99","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$2.99000","currency":"USD"},{"qty":10,"price":"$2.68400","currency":"USD"},{"qty":25,"price":"$2.53760","currency":"USD"},{"qty":100,"price":"$2.19930","currency":"USD"},{"qty":250,"price":"$2.08652","currency":"USD"},{"qty":500,"price":"$1.87222","currency":"USD"},{"qty":1000,"price":"$1.47245","currency":"USD"},{"qty":2000,"price":"$1.43700","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/d0a8321878fcc5289c7be83212ba7ad8.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4128CQ1MF2.5-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/LM4128CQ1MF2.5-NOPB when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}