{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4041CIZ-1.2/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4041CIZ-1.2-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM4041CIZ-1.2-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM4041CIZ-1.2%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM4041CIZ-1.2/NOPB, precision shunt voltage reference, fixed 1.225 V output, ±0.5% tolerance, 20 µVrms noise, TO-92-3 through-hole package, -40°C to 85°C.","salesMarkdown":"## 1.225 V shunt reference with ±0.5% tolerance — the BOM accuracy floor Its ±0.5% initial tolerance sets the system accuracy without external trimming — adequate for 8- to 10-bit ADC bias or comparator thresholds where a 1% error budget is acceptable. As a shunt reference, it regulates by sinking current through a bias resistor from a higher supply rail. The 12 mA maximum output current and 65 µA minimum cathode current define the resistor sizing: for a 5 V supply, a 330 Ω resistor sets the shunt current near 3 mA, well within the stable operating region. ## 20 µVrms noise and 100 ppm/°C drift — what they mean for measurement The noise specification of 20 µVrms over 10 Hz to 10 kHz covers the full audio band and most low-frequency measurement bandwidths. For a 1.225 V reference, this is 16 ppm RMS noise — quiet enough for a 12-bit ADC with a 2.5 V full-scale input without additional filtering. Temperature coefficient is 100 ppm/°C. The TO-92 package's larger thermal mass reduces self-heating drift compared to SOT-23 references under varying load. ## TO-92 through-hole: footprint and thermal reality The TO-226-3 / TO-92-3 package is a three-lead through-hole form factor with 0.100-inch pin spacing. It is designed for insertion into a 0.040-inch diameter plated through-hole. The bulkier body and longer leads add series inductance compared to SMD, but the thermal resistance is lower — the plastic TO-92 can dissipate 500-600 mW in still air, giving headroom for the 1.225 V × 12 mA = 14.7 mW internal dissipation. The /NOPB suffix indicates lead-free / RoHS-compliant construction. No separate lead-free qualification step is needed for assembly lines running SAC305 solder.","metaTitle":"LM4041CIZ-1.2/NOPB Shunt Reference, 1.225 V ±0.5%, TO-92","metaDescription":"Texas Instruments LM4041CIZ-1.2/NOPB precision shunt voltage reference, fixed 1.225 V output, ±0.5% tolerance, 20 µVrms noise, TO-92-3 through-hole package.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Bulk","Tolerance":"±0.5%","Output Type":"Fixed","Mounting Type":"Through Hole","Package / Case":"TO-226-3, TO-92-3 (TO-226AA)","Product Status":"Active","Reference Type":"Shunt","Voltage - Input":"-","lifecycle_stage":"eol_hot","Current - Output":"12 mA","Current - Supply":"-","Current - Cathode":"65 µA","Base Product Number":"LM4041","Noise - 0.1Hz to 10Hz":"-","Noise - 10Hz to 10kHz":"20µVrms","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"TO-92-3","Temperature Coefficient":"100ppm/°C","Voltage - Output (Min/Fixed)":"1.225V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.8300","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d2855eaed3a119e1ade8ae46dfbd1dff.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM4041CIZ-1.2%2FNOPB/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to LM4041CIZ-1.2/NOPB in this component family?","answer":"The LM4041 family includes multiple tolerance grades and package options. A pin-compatible sibling with tighter ±0.1% tolerance is the LM4041AIM3-1.2/NOPB in SOT-23-3, but the TO-92 footprint differs. Within the same TO-92 package, the LM4041DIZ-1.2/NOPB offers a ±1% tolerance grade for cost-sensitive designs."},{"question":"Does LM4041CIZ-1.2/NOPB come in a lead-free package?","answer":"Yes. The /NOPB suffix indicates a lead-free / RoHS-compliant finish. The TO-92 body is molded in standard green molding compound with matte-tin plated copper leads."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4041CIZ-1.2-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/LM4041CIZ-1.2-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}}