{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4040BIM3X-4.1","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4040BIM3X-4.1","canonicalUrl":"https://icboms.com/texas-instruments/LM4040BIM3X-4.1","factsUrl":"https://icboms.com/api/mcp/products/LM4040BIM3X-4.1","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM4040BIM3X-4.1, precision shunt voltage reference, fixed 4.096V output, ±0.2% tolerance, 73 µA cathode current, 80 µVrms noise, SOT-23-3 package, -40°C to 85°C.","salesMarkdown":"It delivers a fixed 4.096V output with a tight ±0.2% initial tolerance, making it a common reference for ADC and DAC circuits that need a stable voltage rail for conversion accuracy. Operating as a shunt reference, it regulates by shunting current through the cathode, drawing just 73 µA typical. The low operating current keeps the thermal budget small in tight layouts, but the trade-off is that a series resistor must be sized to supply both the load and the reference's own cathode current. That means TI has flagged it for eventual phase-out — new builds should not use this part, and existing BOMs need a documented replacement strategy before the last-time-buy window closes. For production runs already qualified, the part remains available through independent distribution. ## SOT-23-3 footprint and temperature range The part comes in a SOT-23-3 package (also listed as TO-236-3, SC-59). It is a surface-mount shunt reference, so the cathode pin connects to the load and the anode goes to ground — the series resistor between the supply and cathode sets the operating current. The temperature coefficient is 100 ppm/°C, which for a 4.096V reference means about 410 µV drift over a 10°C change — fine for 12-bit systems but marginal for 16-bit designs without calibration.","metaTitle":"LM4040BIM3X-4.1 Shunt Voltage Reference, 4.096V ±0.2% SOT-23","metaDescription":"Texas Instruments LM4040BIM3X-4.1 precision shunt reference, 4.096V fixed output, ±0.2% tolerance, 73 µA cathode current, SOT-23-3. NRND status.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","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":"Not For New Designs","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":"80µVrms","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"SOT-23-3","Temperature Coefficient":"100ppm/°C","Voltage - Output (Min/Fixed)":"4.096V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.7425","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/8c40cf163b5cda64fd88ad5c9f25fe6d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM4040BIM3X-4.1/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for LM4040BIM3X-4.1?","answer":"The LM4040 family includes other tolerance grades (e.g., LM4040AIM3X-4.1 with ±0.1%) that may serve as a drop-in if the tighter tolerance is acceptable for the design. For a pin-compatible alternative, look at the LM4040 series in the same SOT-23-3 package — the pinout is identical across the family."},{"question":"Is LM4040BIM3X-4.1 still available for purchase?","answer":"Yes, it remains available through independent distribution channels despite its NRND status. It is not yet discontinued, but it is not recommended for new designs."},{"question":"What is the accuracy of LM4040BIM3X-4.1?","answer":"The initial tolerance is ±0.2% at 25°C. The temperature coefficient is 100 ppm/°C, which adds drift over temperature. For a 4.096V output, ±0.2% equals roughly ±8.2 mV at room temperature."},{"question":"How does LM4040BIM3X-4.1 compare to LM4040AIM3X-4.1?","answer":"The LM4040AIM3X-4.1 offers a tighter ±0.1% initial tolerance versus the ±0.2% of the B-grade. Both share the same 4.096V output, SOT-23-3 package, and 73 µA cathode current. The A-grade is the preferred choice for higher-accuracy designs where the extra cost is justified."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4040BIM3X-4.1","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM4040BIM3X-4.1 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}}