{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TL4051CQDBZR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TL4051CQDBZR","canonicalUrl":"https://icboms.com/texas-instruments/TL4051CQDBZR","factsUrl":"https://icboms.com/api/mcp/products/TL4051CQDBZR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TL4051CQDBZR, adjustable shunt voltage reference, ±0.5% tolerance, 1.212 V to 10 V output, 75 µA cathode current, 20 µVrms noise, SOT-23-3 package, -40°C to 125°C.","salesMarkdown":"## Adjustable shunt reference for precision bias and ADC rails The Texas Instruments TL4051CQDBZR is a precision adjustable shunt voltage reference in a SOT-23-3 package. It delivers a ±0.5% initial tolerance and a 50 ppm/°C temperature coefficient across the full -40°C to 125°C operating range — enough accuracy to hold a 12-bit ADC reference or bias a sensor excitation rail without post-trim. Output is set with two external resistors from a minimum of 1.212 V up to 10 V, limited by the 12 mA maximum cathode current. The shunt topology means it behaves like a programmable Zener: the load and the reference share the same current path, so the bias resistor must be sized to keep at least 75 µA flowing into the cathode at all times — starve it below that and regulation drops out. Noise is specified at 20 µVrms over the 10 Hz to 10 kHz band, which is clean enough for most precision analog front-ends without an external filter cap. The -40°C to 125°C temperature grade qualifies it for industrial motor drives, automotive under-hood modules, and outdoor telecom equipment where the ambient swings hard. ## What the ±0.5% tolerance and 50 ppm/°C drift mean for your BOM The 20 µVrms noise figure is a typical value, not a tested maximum. In a low-impedance shunt configuration with a bypass at the cathode pin, that noise floor is usually adequate for 12-bit SAR ADC references. ## Sourcing and lifecycle — active, no LTB risk The TL4051CQDBZR carries an Active product status and a ROHS3 compliance rating. It is a current-production part that flows through both franchised distribution and the independent channel, so supply is stable for new designs and production replenishment alike. No premium for spot buys, no allocation risk — just a standard catalog reference that fills a BOM line without drama.","metaTitle":"TL4051CQDBZR Shunt Voltage Reference, ±0.5%, SOT-23-3","metaDescription":"TL4051CQDBZR adjustable shunt reference, ±0.5% tolerance, 20 µVrms noise, -40°C to 125°C. Active production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Tolerance":"±0.5%","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"TO-236-3, SC-59, SOT-23-3","Reference Type":"Shunt","lifecycle_stage":"eol_hot","Current - Output":"12 mA","Current - Cathode":"75 µA","Noise - 10Hz to 10kHz":"20µVrms","Operating Temperature":"-40°C ~ 125°C (TA)","Voltage - Output (Max)":"10 V","Supplier Device Package":"SOT-23-3","Temperature Coefficient":"50ppm/°C","Voltage - Output (Min/Fixed)":"1.212V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.97","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.97000","currency":"USD"},{"qty":10,"price":"$1.77000","currency":"USD"},{"qty":25,"price":"$1.66960","currency":"USD"},{"qty":100,"price":"$1.42240","currency":"USD"},{"qty":250,"price":"$1.33560","currency":"USD"},{"qty":500,"price":"$1.16864","currency":"USD"},{"qty":1000,"price":"$0.96831","currency":"USD"},{"qty":3000,"price":"$0.79350","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/de21976c27e5001764b5b03e3537083a.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the typical noise performance of TL4051?","answer":"The TL4051CQDBZR specifies 20 µVrms noise over the 10 Hz to 10 kHz bandwidth. This is a typical value suitable for 12-bit ADC reference applications with a bypass capacitor at the cathode pin."},{"question":"Can TL4051CQDBZR be used as a direct replacement for TL4051BQDBZR?","answer":"The TL4051CQDBZR and TL4051BQDBZR are pin-compatible and functionally identical in the same SOT-23-3 package. The difference is the tolerance grade: the 'C' variant carries ±0.5% initial tolerance, while the 'B' variant is ±0.2%. Check your system accuracy budget before substituting."},{"question":"When sourcing TL4051CQDBZR, what is the closest functional second-source?","answer":"The LM4132AMF-4.1/NOPB is a series reference, not a shunt reference, so it is not a direct functional equivalent. The LM4132 offers tighter tolerance (±0.05%) and lower drift (20 ppm/°C) but requires a supply voltage above the output and has a fixed 4.096 V output. For a shunt-to-shunt second source, look at the Microchip MCP1501 or the ON Semiconductor NCP514 — both are adjustable shunt references in similar SOT-23 packages. Verify pin compatibility and tolerance grade against your BOM."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TL4051CQDBZR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TL4051CQDBZR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}