{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4040AIZ-2.0/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4040AIZ-2.0-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM4040AIZ-2.0-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM4040AIZ-2.0%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM4040AIZ-2.0/NOPB precision shunt voltage reference, fixed 2.048V output, ±0.1% tolerance, 35µVrms noise, 100ppm/°C tempco, 15 mA output, through-hole TO-92-3 package.","salesMarkdown":"## 2.048V shunt reference with ±0.1% initial accuracy The Texas Instruments LM4040AIZ-2.0/NOPB is a precision shunt voltage reference delivering a fixed 2.048V output with ±0.1% initial tolerance — a common reference level for 12-bit and 16-bit ADC/DAC systems where the full-scale range aligns with 2.048V. The shunt topology means it operates like a two-terminal Zener, requiring only a series resistor from the supply to bias the 65 µA minimum cathode current. Output current is rated to 15 mA, so it can also supply a small load directly, though in most precision applications it drives the high-impedance reference input of an ADC. Wideband noise is specified at 35 µVrms over the 10 Hz to 10 kHz band — low enough that it does not dominate the LSB noise floor of a 12-bit ADC with a 2.048V reference (1 LSB ≈ 500 µV). For a 16-bit system where 1 LSB is about 31 µV, that drift eats into the error budget, so this part fits best in 12-bit or moderate-accuracy 14-bit designs unless the ambient temperature is stable. ## Through-hole TO-92-3 — board-fit note The TO-92-3 (TO-226AA) package is a three-lead through-hole form factor with 0.100-inch (2.54 mm) lead spacing. It is a standard footprint for voltage references and small-signal transistors, so board layout is straightforward. The bulk shipping medium means parts arrive in anti-static tubes or bags, not tape-and-reel — plan for manual or tube-fed insertion rather than automated pick-and-place.","metaTitle":"LM4040AIZ-2.0/NOPB Precision Shunt Voltage Reference","metaDescription":"Texas Instruments LM4040AIZ-2.0/NOPB precision shunt voltage reference, fixed 2.048V output, ±0.1% tolerance, 35µVrms noise, TO-92-3 package.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Bulk","Tolerance":"±0.1%","Output Type":"Fixed","Mounting Type":"Through Hole","Package / Case":"TO-226-3, TO-92-3 (TO-226AA)","Product Status":"Obsolete","Reference Type":"Shunt","Voltage - Input":"-","lifecycle_stage":"eol_hot","Current - Output":"15 mA","Current - Supply":"-","Current - Cathode":"65 µA","Base Product Number":"LM4040","Noise - 0.1Hz to 10Hz":"-","Noise - 10Hz to 10kHz":"35µVrms","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"TO-92-3","Temperature Coefficient":"100ppm/°C","Voltage - Output (Min/Fixed)":"2.048V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/8c40cf163b5cda64fd88ad5c9f25fe6d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM4040AIZ-2.0%2FNOPB/alternatives.json"},"ai":{"faq":[{"question":"Is LM4040AIZ-2.0/NOPB obsolete?","answer":"Yes, the LM4040AIZ-2.0/NOPB is listed as obsolete by Texas Instruments. No official replacement order code has been published for the TO-92-3 package variant. For new designs, consider the surface-mount LM4040 family in SOT-23 or SC-70 packages, which remain active and offer the same ±0.1% tolerance and 2.048V output."},{"question":"What is the accuracy (tolerance) of LM4040AIZ-2.0/NOPB?","answer":"The initial accuracy is ±0.1%, which is a precision-grade tolerance suitable for 12-bit and moderate 14-bit ADC/DAC reference applications. Combined with the 100 ppm/°C temperature coefficient, the total error over temperature stays within a few millivolts."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4040AIZ-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/LM4040AIZ-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":"2026-07-22T18:03:28.771Z","lastPublished":"2026-07-22T18:03:28.771Z","indexable":true}}