{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4040QEEM3-2.5/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4040QEEM3-2.5-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM4040QEEM3-2.5-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM4040QEEM3-2.5%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM4040QEEM3-2.5/NOPB, Automotive AEC-Q100 shunt voltage reference, 2.5V fixed output, ±2% tolerance, 150ppm/°C tempco, 35µVrms noise, SOT-23-3 package, -40°C to 125°C.","salesMarkdown":"## Automotive-grade 2.5V shunt reference in SOT-23-3 The Texas Instruments LM4040QEEM3-2.5/NOPB is a precision shunt voltage reference delivering a fixed 2.5V output with ±2% initial tolerance. The shunt architecture requires only a single external resistor to set the bias current — the cathode current floor is 73 µA, and the device can sink up to 15 mA while maintaining regulation. This simplicity and the small SOT-23-3 footprint make it a direct fit for space-constrained automotive PCBs where a dedicated reference IC is preferred over a resistor divider from the supply rail. ## Tempco and noise — the precision budget The temperature coefficient is 150 ppm/°C. Wideband noise is specified at 35 µVrms over 10 Hz to 10 kHz. For a 12-bit ADC with a 2.5V reference, this noise contributes roughly 0.06 LSB rms — negligible for most automotive sensor interfaces. For 16-bit or higher resolution, the noise floor may need post-filtering or a lower-noise reference. ## Package and mounting — SOT-23-3 checklist The pinout is standard for shunt references: cathode (output), anode (ground), and no-connect or trim. For the 15 mA maximum output current at 2.5V, the internal power dissipation is 37.5 mW — well within the package capability even at 125°C ambient. The base product number is LM4040, a long-running TI family with broad second-source coverage across the industry. The part is specified into the BOM; the procurement decision is whether the ±2% tolerance and 150 ppm/°C tempco meet the application error budget, or whether a tighter-grade sibling is needed.","metaTitle":"LM4040QEEM3-2.5/NOPB Automotive Shunt Voltage Reference","metaDescription":"Texas Instruments LM4040QEEM3-2.5/NOPB precision shunt reference, 2.5V fixed output, ±2% tolerance, 150ppm/°C tempco, -40°C to 125°C, AEC-Q100 qualified.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","Series":"Automotive, AEC-Q100","Package":"Tape & Reel (TR); Cut Tape (CT)","Tolerance":"±2%","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"TO-236-3, SC-59, SOT-23-3","Product Status":"Active","Reference Type":"Shunt","Voltage - Input":"-","lifecycle_stage":"eol_hot","Current - Output":"15 mA","Current - Supply":"-","Current - Cathode":"73 µA","Base Product Number":"LM4040","Noise - 0.1Hz to 10Hz":"-","Noise - 10Hz to 10kHz":"35µVrms","Operating Temperature":"-40°C~125°C(TA)","Supplier Device Package":"SOT-23-3","Temperature Coefficient":"150ppm/°C","Voltage - Output (Min/Fixed)":"2.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.3566","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/4e1c3528e3eebcc37e5c67c06abddb5f.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM4040QEEM3-2.5%2FNOPB/alternatives.json"},"ai":{"faq":[{"question":"Is LM4040QEEM3-2.5/NOPB AEC-Q100 qualified?","answer":"Yes, the LM4040QEEM3-2.5/NOPB is listed under the Automotive, AEC-Q100 series."},{"question":"What is the closest pin-compatible alternative to LM4040QEEM3-2.5/NOPB?","answer":"Within the LM4040 family, the standard-grade (non-automotive) LM4040CIM3-2.5/NOPB is pin-compatible and functionally identical but lacks AEC-Q100 qualification and the extended temperature range. For a tighter tolerance, the LM4040AIM3-2.5/NOPB offers ±0.1% initial accuracy with a 50 ppm/°C tempco, also in SOT-23-3. Both are direct footprint replacements."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4040QEEM3-2.5-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/LM4040QEEM3-2.5-NOPB when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T18:03:28.771Z","lastPublished":"2026-07-22T18:03:28.771Z","indexable":true}}