{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4040BIM3-8.2/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4040BIM3-8.2-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM4040BIM3-8.2-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM4040BIM3-8.2%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM4040BIM3-8.2/NOPB, precision shunt voltage reference, 8.192 V fixed output, ±0.2% tolerance, 15 mA output current, 95 µA cathode current, 100 ppm/°C tempco, SOT-23-3 package, -40°C to 85°C.","salesMarkdown":"The Texas Instruments LM4040BIM3-8.2/NOPB is a precision shunt voltage reference that delivers a fixed 8.192 V output with ±0.2% initial tolerance. As a shunt (two-terminal) reference, it behaves like a Zener diode — it regulates by shunting current through an external resistor to ground, making it simple to bias from any supply voltage above 8.192 V. ## Why the ±0.2% tolerance and 100 ppm/°C drift matter The ±0.2% initial accuracy means the output sits between 8.176 V and 8.208 V at 25°C — tight enough for 12-bit ADC references without external trim. For designs that need better than 0.5% total accuracy over temperature, this grade is a solid fit without jumping to the A-grade (±0.1%) bin. ## Biasing it right — the external resistor is not optional A shunt reference always needs an external resistor from the supply to the cathode pin to set the bias current. The LM4040BIM3-8.2/NOPB sinks a minimum of 95 µA cathode current and can deliver up to 15 mA to the load. The resistor value is chosen so that the sum of the load current and the cathode current stays between 95 µA and 15 mA over all supply and load conditions — pick it too large and the reference drops out of regulation; too small and the power dissipation in the resistor or the part exceeds ratings. For a typical 12 V rail and a 1 mA load, a 3.3 kΩ resistor works cleanly.","metaTitle":"LM4040BIM3-8.2/NOPB Shunt Voltage Reference, 8.192 V, ±0.2%","metaDescription":"Texas Instruments LM4040BIM3-8.2/NOPB precision shunt reference, 8.192 V fixed output, ±0.2% tolerance, SOT-23-3, -40°C to 85°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Tolerance":"±0.2%","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":"95 µA","Base Product Number":"LM4040","Noise - 0.1Hz to 10Hz":"-","Noise - 10Hz to 10kHz":"130µVrms","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"SOT-23-3","Temperature Coefficient":"100ppm/°C","Voltage - Output (Min/Fixed)":"8.192V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.6900","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/db47fc1a31c797b619d88478be755429.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM4040BIM3-8.2%2FNOPB/alternatives.json"},"ai":{"faq":[{"question":"Can LM4040BIM3-8.2/NOPB replace LM4040AIM3-8.2?","answer":"Yes, as a drop-in replacement in the same SOT-23-3 footprint. The LM4040BIM3-8.2/NOPB has a ±0.2% tolerance, while the A-grade version (LM4040AIM3-8.2) is ±0.1%. Both are 8.192 V shunt references with identical pinout and operating range. If the design's accuracy budget can absorb the wider tolerance, the B-grade is a direct substitute."},{"question":"Does LM4040BIM3-8.2/NOPB require an external resistor?","answer":"Yes. As a shunt reference, it must be biased with an external resistor from the positive supply to the cathode pin. The resistor sets the bias current, which must stay between the 95 µA minimum cathode current and the 15 mA maximum output current for proper regulation. No resistor means no regulation — the part simply conducts and the output follows the supply."},{"question":"What is the typical application for LM4040BIM3-8.2/NOPB?","answer":"It is used as a precision voltage reference in industrial analog circuits: ADC/DAC reference, comparator threshold setting, power-supply monitoring, and sensor excitation. The 8.192 V output is a common full-scale voltage for 12-bit and 16-bit ADCs with a 0 V to 10 V input range. The SOT-23-3 package fits on tight mixed-signal boards where board space is at a premium."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4040BIM3-8.2-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/LM4040BIM3-8.2-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}}