{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"REF3133AIDBZT","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"REF3133AIDBZT","canonicalUrl":"https://icboms.com/texas-instruments/REF3133AIDBZT","factsUrl":"https://icboms.com/api/mcp/products/REF3133AIDBZT","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments REF3133AIDBZT, Series voltage reference, 3.3V fixed output, ±0.2% tolerance, 20ppm/°C drift, 135µA supply, SOT-23-3, -40 to 125°C.","salesMarkdown":"## 3.3 V fixed reference in a three-pin SOT-23 It is designed for applications requiring a stable, low-noise reference voltage — think ADC references, DAC bias, or precision regulator setpoints in industrial and automotive environments. That combination means the output stays within a few millivolts of 3.3 V over temperature without external trimming. Supply current is 135 µA typical, making it suitable for always-on reference rails in battery-operated equipment. ## Noise floor and output drive Low-frequency noise is specified at 43 µVp-p over 0.1 Hz to 10 Hz, and 63 µVrms over 10 Hz to 10 kHz. For a 16-bit ADC with a 3.3 V reference, that noise contribution is well below 1 LSB, so it won't limit the converter's effective resolution in most industrial signal chains. The output can source or sink up to 10 mA. That's enough to bias a handful of op-amp inputs or a single ADC reference input, but not enough to power a load — plan a buffer if the reference rail needs to drive multiple converters or a long trace. The base product number is REF3133, so other tolerance or temperature variants (REF3133AIDBZR, REF3133AIDBZT) share the same die and pinout.","metaTitle":"REF3133AIDBZT 3.3V Series Voltage Reference, ±0.2%, SOT-23-3","metaDescription":"Texas Instruments REF3133AIDBZT: 3.3V fixed output, ±0.2% tolerance, 20ppm/°C drift, 135µA supply, SOT-23-3. Industrial temp -40 to 125°C.","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); 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":"Active","Reference Type":"Series","Voltage - Input":"3.35V ~ 5.5V","lifecycle_stage":"eol_hot","Current - Output":"10 mA","Current - Supply":"135µA","Base Product Number":"REF3133","Noise - 0.1Hz to 10Hz":"43µVp-p","Noise - 10Hz to 10kHz":"63µVrms","Operating Temperature":"-40°C~125°C(TA)","Supplier Device Package":"SOT-23-3","Temperature Coefficient":"20ppm/°C","Voltage - Output (Min/Fixed)":"3.3V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.2000","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/REF3133AIDBZT/alternatives.json"},"ai":{"faq":[{"question":"What is the tolerance of REF3133AIDBZT?","answer":"The initial output voltage tolerance is ±0.2%."},{"question":"What package does REF3133AIDBZT come in?","answer":"It is supplied in a SOT-23-3 package (also listed as TO-236-3 / SC-59). The three-pin footprint is easy to hand-solder or rework with a standard hot-air station."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/REF3133AIDBZT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/REF3133AIDBZT 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}}