{"schemaVersion":1,"slug":"instrumentation-amplifier","name":"Instrumentation amplifier","kind":"symbol","abbreviation":"INA","aliases":["instrument amplifier","differential instrumentation amp"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Amplifies a differential input signal using an instrumentation-amplifier input and gain arrangement.","description":["Amplifies a differential input signal using an instrumentation-amplifier input and gain arrangement.","On a schematic, identify the two measurement inputs, gain-setting terminals and output reference and trace the conditioned measurement signal and receiving converter. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","An instrumentation amplifier and a basic difference amplifier have different input and gain arrangements; the selected device defines their capabilities.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify the two measurement inputs, gain-setting terminals and output reference.","Trace the conditioned measurement signal and receiving converter."],"drawingChecklist":["Label the two measurement inputs, gain-setting terminals and output reference.","Cross-reference the conditioned measurement signal and receiving converter.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"An instrumentation amplifier and a basic difference amplifier have different input and gain arrangements; the selected device defines their capabilities.","facts":[{"label":"Common schematic mnemonic","value":"INA — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The two measurement inputs, gain-setting terminals and output reference"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-adi-ina","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["difference-amplifier","plc-io"],"artwork":"electronics-amp-instrumentation","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/instrumentation-amplifier","illustration":{"url":"https://eloragrid.ai/library/illustrations/instrumentation-amplifier.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-adi-ina","title":"AD620 — instrumentation amplification","publisher":"Analog Devices","url":"https://www.analog.com/en/products/ad620.html","type":"manufacturer","scope":"Public component description and documentation for instrumentation amplification. Used to support the functional reference, not to prescribe a circuit or redistribute product diagrams.","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."}]}