{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4128AMF-2.5/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4128AMF-2.5-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM4128AMF-2.5-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM4128AMF-2.5%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM4128AMF-2.5/NOPB, series voltage reference, fixed 2.5V output, ±0.1% initial tolerance, 75ppm/°C drift, 20 mA output, 100 µA supply, SOT-23-5, -40°C to 125°C.","salesMarkdown":"## 2.5 V reference for precision rails — what the ratings mean The Texas Instruments LM4128AMF-2.5/NOPB is a series voltage reference that delivers a fixed 2.5 V output with ±0.1% initial tolerance. That tolerance is the BOM's accuracy floor — it sets the worst-case error budget for an ADC reference input, a comparator threshold, or a DAC's full-scale voltage before any temperature or aging drift is added. Input voltage range is 2.9 V to 5.5 V. Temperature coefficient is 75 ppm/°C. Output current is rated at 20 mA. That's enough to drive one ADC reference input plus a 0.1 µF bypass cap, or a single op-amp's reference pin. Driving multiple converter reference inputs or a heavy load (e.g., a resistive divider string below 125 Ω) will pull the output out of regulation — add a buffer amplifier if the load exceeds 20 mA. Supply current is 100 µA typical. That's low enough for battery-powered instrumentation — the reference itself won't dominate the power budget in a sensor node running at a few mA total draw. The SOT-23-5 package is a five-pin surface-mount footprint. ## Active production — no LTB clock No last-time-buy notice, no NRND flag. RoHS3 compliant and lead-free — no exemption issues for EU or California markets. The NOPB suffix confirms the part is fully green, no Pb in the solder finish. ## Where it fits — and where it doesn't This reference fits industrial sensor interfaces, loop-powered transmitters, automotive ECU reference rails, and battery-powered instrumentation.","metaTitle":"LM4128AMF-2.5/NOPB Voltage Reference, ±0.1%, 2.5V Fixed","metaDescription":"TI LM4128AMF-2.5/NOPB series voltage reference, 2.5V fixed output, ±0.1% tolerance, 75ppm/°C drift, SOT-23-5. Active, RoHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Tolerance":"±0.1%","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":"75ppm/°C","Voltage - Output (Min/Fixed)":"2.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.56","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$3.56000","currency":"USD"},{"qty":10,"price":"$3.20100","currency":"USD"},{"qty":25,"price":"$3.02600","currency":"USD"},{"qty":100,"price":"$2.62260","currency":"USD"},{"qty":250,"price":"$2.48808","currency":"USD"},{"qty":500,"price":"$2.23254","currency":"USD"},{"qty":1000,"price":"$1.90317","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/d0a8321878fcc5289c7be83212ba7ad8.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the initial accuracy of LM4128AMF-2.5/NOPB?","answer":"Initial tolerance is ±0.1%. That means the 2.5 V output can be anywhere from 2.4975 V to 2.5025 V at 25°C before temperature drift is added."},{"question":"What is a direct replacement or equivalent for LM4128AMF-2.5/NOPB?","answer":"The LM4132AMF-4.1/NOPB is the closest functional sibling in the same series family, but it outputs 4.096 V instead of 2.5 V and offers tighter tolerance (±0.05%) and tempco (20 ppm/°C). It is not a pin-compatible drop-in — the output voltage differs. For a 2.5 V replacement, look at other LM4128 voltage options (e.g., LM4128AMF-1.8/NOPB or LM4128AMF-3.3/NOPB) or the LM4040 series in the same SOT-23 package."},{"question":"Is LM4128AMF-2.5/NOPB lead-free?","answer":"Yes, it is ROHS3 compliant and lead-free (NOPB suffix). No RoHS exemptions apply."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4128AMF-2.5-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/LM4128AMF-2.5-NOPB when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}