{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4040D50IDBZTG4","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4040D50IDBZTG4","canonicalUrl":"https://icboms.com/texas-instruments/LM4040D50IDBZTG4","factsUrl":"https://icboms.com/api/mcp/products/LM4040D50IDBZTG4","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM4040D50IDBZTG4, precision shunt voltage reference, fixed 5V output, ±1% tolerance, 150ppm/°C temperature coefficient, 15 mA output, SOT-23-3 package, Tape & Reel.","salesMarkdown":"## Fixed 5V shunt reference in SOT-23-3 It operates as a two-terminal shunt device — essentially a low-drift Zener diode — requiring only a series resistor from the supply to set the bias current. The SOT-23-3 package fits tight PCB layouts where a dedicated reference IC in a larger SOIC or MSOP would consume board area better used for signal routing. ## 95 µA cathode current — the bias floor The minimum cathode current is 95 µA, which sets the lower bound for the series resistor value. For a 12V rail feeding the reference, the resistor sees (12V - 5V) = 7V across it; at 95 µA that is roughly 74 kΩ. Running the cathode current higher — up to the 15 mA output rating — improves dynamic impedance and noise rejection but adds to the system power budget. The 80 µVrms noise spec (10 Hz to 10 kHz) is typical for a shunt reference at moderate bias; for noise-critical ADC front-ends, a larger cathode current or a post-filter cap helps. ## 150 ppm/°C drift and industrial temperature range That is adequate for a 12-bit ADC reference where the LSB is around 1.2 mV at 5V full-scale, but marginal for 14-bit or higher systems without calibration. The operating temperature range covers industrial environments — motor drives, PLC I/O modules, base station power supplies — but does not extend to the -55°C or +125°C extremes required for avionics or under-hood automotive.","metaTitle":"TI LM4040D50IDBZTG4 Shunt Voltage Reference, 5V ±1%","metaDescription":"Texas Instruments LM4040D50IDBZTG4 precision shunt reference, fixed 5V output, ±1% tolerance, 150ppm/°C drift, -40°C to 85°C, SOT-23-3 package.","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)","Tolerance":"±1%","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"TO-236-3, SC-59, SOT-23-3","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":"80µVrms","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"SOT-23-3","Temperature Coefficient":"150ppm/°C","Voltage - Output (Min/Fixed)":"5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM4040D50IDBZTG4/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to LM4040D50IDBZTG4?","answer":"The LM4040D50IDBZR is the same base device with a different tape-and-reel suffix — the die, package, and electrical specs are identical. The difference is in the reel packaging format (embossed vs standard carrier tape), which affects pick-and-place feeder setup but not the electrical fit. Confirm the reel format with your CM before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4040D50IDBZTG4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM4040D50IDBZTG4 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}}