{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4128DMF-3.0","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4128DMF-3.0","canonicalUrl":"https://icboms.com/texas-instruments/LM4128DMF-3.0","factsUrl":"https://icboms.com/api/mcp/products/LM4128DMF-3.0","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM4128 series precision voltage reference, LM4128DMF-3.0, fixed 3V output, ±1% tolerance, 20 mA output, SOT-23-5 package, Bulk.","salesMarkdown":"The LM4128DMF-3.0 is a series voltage reference from TI's LM4128 family, delivering a fixed 3V output with ±1% initial accuracy. That ±1% tolerance means the output sits between 2.97V and 3.03V at 25°C — tight enough to serve as the reference for an 8-bit or 10-bit ADC without external trimming, but not sufficient for a 12-bit system that typically needs ±0.1% or better. Input voltage range is 2.2V to 5.5V, so it runs from a 3.3V rail with 300 mV headroom or from a 5V rail with 2V of dropout margin. The 20 mA output current ceiling limits the load to a single ADC reference input or a few op-amp bias networks — not enough to power a sensor bridge directly. ## Temperature drift and noise floor — industrial-grade stability That drift budget is acceptable for an industrial controller monitoring a 0-10V analog input with 8-bit resolution, but marginal for a 10-bit sensor front-end that needs to hold accuracy across a hot enclosure. For a 10-bit ADC with a 3V reference, the LSB is 2.93 mV, so the noise floor sits at about 10% of one LSB and does not limit resolution. For a 12-bit system (732 µV LSB), the noise is 39% of one LSB and starts to degrade the effective number of bits. ## Active lifecycle, but RoHS non-compliant — what that means for procurement RoHS compliance is marked as non-compliant. This part contains lead (Pb) above the 0.1% threshold — likely in the solder plating or the die-attach material. It is exempt under certain RoHS categories (e.g., Annex III exemption 7(c)-I for high-melting-temperature solders), but a BOM that requires full RoHS conformity cannot use this order code. The lead-free variant in the same family would carry a different suffix. ## SOT-23-5 footprint and supply current — board-fit and power budget The part is supplied in a SOT-23-5 package (SC-74A, SOT-753), 5-lead surface-mount with 0.95 mm pitch. The footprint is standard for small-signal references and fits a 2-layer PCB with basic fan-out. No exposed pad — thermal dissipation is through the leads and the board copper. Quiescent supply current is 100 µA typical. In a battery-powered sensor node that sleeps most of the time, the reference's own draw is the dominant idle current — the 100 µA floor means the reference cannot be left powered continuously in a sub-10 µA sleep budget design without a load switch.","metaTitle":"TI LM4128DMF-3.0 Series Voltage Reference, 3V Fixed","metaDescription":"Texas Instruments LM4128DMF-3.0 series voltage reference, fixed 3V output, ±1% tolerance, 20 mA output, SOT-23-5. Active lifecycle, RoHS non-compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"RoHS non-compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Bulk","Tolerance":"±1%","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"SC-74A, SOT-753","Reference Type":"Series","Voltage - Input":"2.2V ~ 5.5V","lifecycle_stage":"eol_hot","Current - Output":"20 mA","Current - Supply":"100µA","Noise - 0.1Hz to 10Hz":"285µVp-p","Operating Temperature":"-40°C ~ 125°C (TJ)","Supplier Device Package":"SOT-23-5","Temperature Coefficient":"100ppm/°C","Voltage - Output (Min/Fixed)":"3V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.7","stockQuantity":0,"priceTiers":[{"qty":431,"price":"$0.70000","currency":"USD"}]},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"What is the closest alternative to LM4128DMF-3.0 in the same family?","answer":"The LM4128 family includes fixed-output voltage options at 1.25V, 2.048V, 2.5V, 3.0V, 4.096V, and 5.0V, all in the same SOT-23-5 package with identical pinout. The 3.0V variant is the LM4128DMF-3.0. If a different output voltage is needed, the pin-compatible sibling at that voltage is the direct alternative — no board layout change required."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4128DMF-3.0","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM4128DMF-3.0 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}}