{"schemaVersion":1,"slug":"fully-differential-amplifier","name":"Fully differential amplifier","kind":"symbol","abbreviation":"FDA","aliases":["differential output amplifier","balanced amplifier"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Processes an analogue input to provide two complementary output signals around a defined common-mode level.","description":["Processes an analogue input to provide two complementary output signals around a defined common-mode level.","On a schematic, identify the input network, output common-mode control and two output terminals and trace the differential output pair and ADC/load interface. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","Two output terminals distinguish a fully differential amplifier from a single-ended-output difference amplifier.","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 input network, output common-mode control and two output terminals.","Trace the differential output pair and ADC/load interface."],"drawingChecklist":["Label the input network, output common-mode control and two output terminals.","Cross-reference the differential output pair and ADC/load interface.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"Two output terminals distinguish a fully differential amplifier from a single-ended-output difference amplifier.","facts":[{"label":"Common schematic mnemonic","value":"FDA — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The input network, output common-mode control and two output terminals"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-fda","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-fda","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/fully-differential-amplifier","illustration":{"url":"https://eloragrid.ai/library/illustrations/fully-differential-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-ti-fda","title":"THS4551 — fully differential amplification","publisher":"Texas Instruments","url":"https://www.ti.com/product/THS4551","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of fully differential amplification. 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."}]}