{"schemaVersion":1,"slug":"shunt-voltage-reference","name":"Shunt voltage reference","kind":"symbol","abbreviation":"VREF-H","aliases":["shunt reference","programmable shunt reference"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Establishes a reference voltage using a shunt-current path and the documented bias or feedback circuit.","description":["Establishes a reference voltage using a shunt-current path and the documented bias or feedback circuit.","On a schematic, identify the shunt terminals, bias-current source and adjustment network and trace the reference node and return conductor. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A shunt reference requires its bias arrangement; its terminals cannot be substituted directly for a three-terminal series reference.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the shunt terminals, bias-current source and adjustment network.","Trace the reference node and return conductor."],"drawingChecklist":["Label the shunt terminals, bias-current source and adjustment network.","Cross-reference the reference node and return conductor.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A shunt reference requires its bias arrangement; its terminals cannot be substituted directly for a three-terminal series reference.","facts":[{"label":"Common schematic mnemonic","value":"VREF-H — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The shunt terminals, bias-current source and adjustment network"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-shunt-ref","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["zener-diode","plc-io"],"artwork":"electronics-analogue-shunt-ref","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/shunt-voltage-reference","illustration":{"url":"https://eloragrid.ai/library/illustrations/shunt-voltage-reference.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"pub-electronics-ti-shunt-ref","title":"TL431 — programmable shunt references","publisher":"Texas Instruments","url":"https://www.ti.com/product/TL431","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of programmable shunt references. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}]}