{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4128BMF-2.0/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4128BMF-2.0-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM4128BMF-2.0-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM4128BMF-2.0%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM4128BMF-2.0/NOPB series voltage reference, fixed 2.048V output, ±0.2% tolerance, 20mA output, 100µA supply, 190µVp-p noise, SOT-23-5, tape and reel.","salesMarkdown":"## Precision bias for signal-chain boards The LM4128BMF-2.0/NOPB is a series voltage reference from Texas Instruments that delivers a fixed 2.048 V output with ±0.2% initial tolerance — tight enough to set the full-scale range for a 16-bit ADC without external trimming. It sinks 100 µA quiescent and can source up to 20 mA to the reference input of multiple converters or a DAC buffer. As a series reference, it regulates the output from the input rail — 2.448 V to 5.5 V — without needing a ballast resistor like a shunt reference would. The fixed output eliminates the noise and drift of an external divider network. ## Noise and drift that limit the ADC chain A 16-bit ADC with a 2.048 V reference has a 31.25 µV LSB; the reference noise alone contributes about 6 LSBs of peak-to-peak noise, so the system noise budget needs to account for it. Temperature coefficient is 75 ppm/°C — over a -40°C to 125°C junction range, the output can shift by roughly 12.3 mV worst-case. That is about 0.6% of the 2.048 V output, which dominates the initial tolerance in a wide-temperature application. For precision across temperature, the tighter 20 ppm/°C LM4132 sibling is a better fit. ## SOT-23-5 footprint and sourcing posture The LM4128BMF-2.0/NOPB comes in a SOT-23-5 package (SC-74A), a 5-lead surface-mount footprint that fits dense mixed-signal boards. The tape-and-reel or cut-tape packaging suits both prototype assembly and production reflow. The part is ROHS3 compliant, meaning no exempt substances and full lead-free assembly compatibility.","metaTitle":"TI LM4128BMF-2.0/NOPB Series Voltage Reference, 2.048V, 0.2%","metaDescription":"Texas Instruments LM4128BMF-2.0/NOPB series voltage reference, fixed 2.048V output, ±0.2% tolerance, 20mA output, SOT-23-5. Active production, 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":"±0.2%","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"SC-74A, SOT-753","Reference Type":"Series","Voltage - Input":"2.448V ~ 5.5V","lifecycle_stage":"eol_hot","Current - Output":"20 mA","Current - Supply":"100µA","Noise - 0.1Hz to 10Hz":"190µVp-p","Operating Temperature":"-40°C ~ 125°C (TJ)","Supplier Device Package":"SOT-23-5","Temperature Coefficient":"75ppm/°C","Voltage - Output (Min/Fixed)":"2.048V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.81","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$2.81000","currency":"USD"},{"qty":10,"price":"$2.52500","currency":"USD"},{"qty":25,"price":"$2.38680","currency":"USD"},{"qty":100,"price":"$2.06870","currency":"USD"},{"qty":250,"price":"$1.96256","currency":"USD"},{"qty":500,"price":"$1.76100","currency":"USD"},{"qty":1000,"price":"$1.50120","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/d0a8321878fcc5289c7be83212ba7ad8.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest functional second-source to LM4128BMF-2.0/NOPB?","answer":"The LM4132AMF-4.1/NOPB is a series reference in the same SOT-23-5 package, but it outputs 4.096 V with tighter ±0.05% tolerance and 20 ppm/°C drift. It does not drop in without a board change because the output voltage is different — the LM4128BMF-2.0/NOPB is a 2.048 V part, so the ADC full-scale range and divider ratios would need rework."},{"question":"What compliance documentation does Texas Instruments provide for LM4128BMF-2.0/NOPB?","answer":"The part is ROHS3 compliant per Texas Instruments. Standard documentation includes the datasheet, PCN notifications, and material declaration. No UL or IEC certification is listed for this reference."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4128BMF-2.0-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/LM4128BMF-2.0-NOPB when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}