{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TL431ACDG4","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TL431ACDG4","canonicalUrl":"https://icboms.com/texas-instruments/TL431ACDG4","factsUrl":"https://icboms.com/api/mcp/products/TL431ACDG4","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TL431ACDG4 adjustable shunt voltage reference, ±1% tolerance, 2.495 V reference, 100 mA output, 8-SOIC surface mount package, 0°C~70°C operating temperature.","salesMarkdown":"## ±1% tolerance — the precision tier in the TL431 family The TL431ACDG4 is Texas Instruments' adjustable shunt voltage reference with a ±1% initial tolerance on the 2.495 V internal reference. That tolerance grade is the key spec: it moves this part above the standard TL431 (±2%) and into the precision tier, where the output voltage accuracy after the divider network stays inside ±1% without trimming. ## 100 mA shunt capacity and the bias resistor decision The cathode can sink up to 100 mA continuously. For a typical 5 V rail with a 2.5 V reference, the minimum bias resistor is (5 V – 2.495 V) / 0.1 A ≈ 25 Ω — but that's the thermal floor; in practice a 1 kΩ resistor keeps the cathode current near 2.5 mA, well above the 600 µA minimum to maintain regulation, and leaves headroom for load transients. ## 8-SOIC package — layout and thermal note Housed in the industry-standard 8-SOIC (0.154\" width, 3.90 mm body), this part shares the footprint with countless other SOIC-8 shunt references and op-amps. The 100 mA cathode current at 36 V max output means up to 3.6 W dissipation if the device is asked to regulate near the voltage ceiling at full current — the copper pour on the cathode tab side of the PCB needs to handle that thermal load. For most designs running at a few milliamps, the standard SOIC-8 layout is fine.","metaTitle":"TL431ACDG4 Shunt Voltage Reference, ±1% Tolerance, 8-SOIC","metaDescription":"Texas Instruments TL431ACDG4 adjustable shunt voltage reference. 2.495 V reference, ±1% tolerance, 100 mA output, 8-SOIC surface mount.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Tube","Tolerance":"±1%","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","Reference Type":"Shunt","Voltage - Input":"-","lifecycle_stage":"eol_hot","Current - Output":"100 mA","Current - Supply":"-","Current - Cathode":"600 µA","Base Product Number":"TL431","Noise - 0.1Hz to 10Hz":"-","Noise - 10Hz to 10kHz":"-","Operating Temperature":"0°C~70°C(TA)","Voltage - Output (Max)":"36 V","Supplier Device Package":"8-SOIC","Temperature Coefficient":"-","Voltage - Output (Min/Fixed)":"2.495V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.4300","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/2e8567ad04842692d5fb8309c69e90b6.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TL431ACDG4/alternatives.json"},"ai":{"faq":[{"question":"Can TL431ACDG4 replace TL431ACDG?","answer":"Yes — the TL431ACDG4 is the ±1% tolerance variant of the base TL431ACDG (typically ±2%). Pin-compatible, same 8-SOIC package, same 2.495 V reference and 100 mA output. The tighter tolerance is the only difference; swapping it in improves output accuracy without a board change."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TL431ACDG4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TL431ACDG4 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}}