{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"REF191GSZ","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"REF191GSZ","canonicalUrl":"https://icboms.com/analog-devices/REF191GSZ","factsUrl":"https://icboms.com/api/mcp/products/REF191GSZ","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices REF19 series, REF191GSZ, fixed 2.048 V series voltage reference, ±0.5% tolerance, 30 mA output, 45 µA supply, 25 ppm/°C drift, 8-SOIC package, -40°C to 85°C.","salesMarkdown":"## 2.048 V reference for precision analog chains The REF191GSZ is a fixed 2.048 V series voltage reference in an 8-SOIC package. It regulates the output to within ±0.5% initial tolerance and can source up to 30 mA. ## Active lifecycle — no LTB clock ticking ADI lists the REF191GSZ as Active. There is no last-time-buy notice, no NRND flag, and no official successor code to track. For a BOM that needs a stable reference for the next several years, this part does not carry an obsolescence risk. The REF19 series has been a staple in ADI's catalogue for years — the risk profile is low, but as with any single-sourced IC, a second-source qualification (see the ADR291 peers) is worth the paperwork if the production volume justifies it.","metaTitle":"REF191GSZ Voltage Reference, 2.048 V, ±0.5%, 8-SOIC","metaDescription":"REF191GSZ series voltage reference from Analog Devices: fixed 2.048 V output, ±0.5% tolerance, 45 µA supply current, -40°C to 85°C.","metaKeywords":null},"attributes":{"series":"REF19","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Series":"REF19","Package":"Tube","Tolerance":"±0.5%","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","Reference Type":"Series","Voltage - Input":"3V ~ 15V","lifecycle_stage":"eol_hot","Current - Output":"30 mA","Current - Supply":"45µA","Noise - 0.1Hz to 10Hz":"20µVp-p","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"8-SOIC","Temperature Coefficient":"25ppm/°C","Voltage - Output (Min/Fixed)":"2.048V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.06","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$5.06000","currency":"USD"},{"qty":10,"price":"$4.54100","currency":"USD"},{"qty":25,"price":"$4.29280","currency":"USD"},{"qty":100,"price":"$3.72060","currency":"USD"},{"qty":250,"price":"$3.52980","currency":"USD"},{"qty":500,"price":"$3.16728","currency":"USD"},{"qty":1000,"price":"$2.70000","currency":"USD"}]},"links":{"datasheetUrl":"https://www.analog.com/media/en/technical-documentation/data-sheets/REF19XSERIES.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is REF191GSZ obsolete?","answer":"No — the lifecycle status is Active. There is no discontinuation notice and no last-time-buy window. It is safe for new designs and ongoing production."},{"question":"What is the tolerance of REF191GSZ?","answer":"Initial accuracy is ±0.5%. At 2.048 V that means the output can be anywhere from 2.037 V to 2.059 V before temperature drift is factored in."},{"question":"What is the difference between REF191GSZ and REF192GSZ?","answer":"The REF192GSZ is the same REF19 series but with a 2.5 V output instead of 2.048 V. All other specs — package, tolerance, supply current, temperature coefficient — are identical. The choice is purely which reference voltage the ADC or DAC requires."},{"question":"What is the closest functional second-source to REF191GSZ?","answer":"The ADR291FRZ (ADI XFET series) is a functional alternative: it outputs 2.5 V (not 2.048 V) with tighter tolerance (±0.12%) and lower drift (15 ppm/°C), but its maximum output current is only 5 mA versus the REF191GSZ's 30 mA. If the load current is under 5 mA and the system can accept 2.5 V, the ADR291FRZ is a drop-in 8-SOIC replacement with better accuracy. For a 2.048 V requirement, no exact pin-compatible second source is listed in the REF19 series."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/REF191GSZ","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/REF191GSZ 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}}