INA2321EA

{
  "slug": "ina2321ea",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Instrumentation Amplifiers, TSSOP-14. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
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    "amplifiers-comparators",
    "ina2321ea",
    "factory-2.0.0",
    "extractor-text"
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  "dependencies": {},
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  "component": {
    "mpn": "INA2321EA",
    "manufacturer": "Texas Instruments",
    "package": "TSSOP-14",
    "pin_count": 14,
    "category": "Amplifiers/Comparators",
    "subcategory": "Instrumentation Amplifiers",
    "datasheet": "https://www.ti.com/cn/lit/gpn/ina321",
    "parts": {
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      "footprint": "ina2321ea.kicad_mod",
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      "lbr": "ina2321ea.lbr"
    },
    "distributor_links": {
      "lcsc": "C202234"
    },
    "distributor_check": {
      "checked_at": "2026-10-11T01:29:06Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "Shutdown A",
        "type": "input",
        "description": "Shutdown control for amplifier A, nominally connected to V+; pulling it below 0.8V on a 5V supply puts the amplifier into sleep mode (under 1µA quiescent current) within nanoseconds."
      },
      {
        "number": "2",
        "name": "VOUTA",
        "type": "output",
        "description": "Output of amplifier A, referred to the REFA terminal, swinging rail-to-rail for gains of 10 or greater and optimized for load impedances of 10kΩ or greater."
      },
      {
        "number": "3",
        "name": "REFA",
        "type": "input",
        "description": "Reference terminal that sets the zero-output level for amplifier A; it requires a low-impedance connection, must be at least 1.2V below the positive supply rail, and 160Ω in series degrades CMRR to 80dB."
      },
      {
        "number": "4",
        "name": "V+",
        "type": "power_in",
        "description": "Positive power supply, specified from +2.7V to +5.5V (operating range +2.5V to +5.5V), and should be decoupled with 0.1µF capacitors as close to the device as possible."
      },
      {
        "number": "5",
        "name": "REFB",
        "type": "input",
        "description": "Reference terminal that sets the zero-output level for amplifier B; it requires a low-impedance connection, must be at least 1.2V below the positive supply rail, and 160Ω in series degrades CMRR to 80dB."
      },
      {
        "number": "6",
        "name": "VOUTB",
        "type": "output",
        "description": "Output of amplifier B, referred to the REFB terminal, swinging rail-to-rail for gains of 10 or greater and optimized for load impedances of 10kΩ or greater."
      },
      {
        "number": "7",
        "name": "Shutdown B",
        "type": "input",
        "description": "Shutdown control for amplifier B, nominally connected to V+; pulling it below 0.8V on a 5V supply puts the amplifier into sleep mode (under 1µA quiescent current) within nanoseconds."
      },
      {
        "number": "8",
        "name": "RGB",
        "type": "passive",
        "description": "Gain-setting resistor connection for amplifier B, where gain G = 5 + 5(R2/R1) and gain above 5 V/V is set by external resistors across this pin."
      },
      {
        "number": "9",
        "name": "VIN−B",
        "type": "power_in",
        "description": "Inverting input of amplifier B; input ESD diodes conduct if the input exceeds the supply rails by more than 500mV, so input signals beyond that must be limited to 10mA, and a bias-current return path is required."
      },
      {
        "number": "10",
        "name": "VIN+B",
        "type": "power_in",
        "description": "Non-inverting input of amplifier B; input ESD diodes conduct if the input exceeds the supply rails by more than 500mV, so input signals beyond that must be limited to 10mA, and a bias-current return path is required."
      },
      {
        "number": "11",
        "name": "V−",
        "type": "power_in",
        "description": "Negative power supply terminal, supporting single-supply or bipolar-supply operation of the INA321 family."
      },
      {
        "number": "12",
        "name": "VIN+A",
        "type": "power_in",
        "description": "Non-inverting input of amplifier A; input ESD diodes conduct if the input exceeds the supply rails by more than 500mV, so input signals beyond that must be limited to 10mA, and a bias-current return path is required."
      },
      {
        "number": "13",
        "name": "VIN−A",
        "type": "power_in",
        "description": "Inverting input of amplifier A; input ESD diodes conduct if the input exceeds the supply rails by more than 500mV, so input signals beyond that must be limited to 10mA, and a bias-current return path is required."
      },
      {
        "number": "14",
        "name": "RGA",
        "type": "passive",
        "description": "Gain-setting resistor connection for amplifier A, where gain G = 5 + 5(R2/R1) and gain above 5 V/V is set by external resistors across this pin."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
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        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
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        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The text extraction lists pin names and pin numbers in separate blocks, so the number-to-name mappin; The datasheet does not state a specific pin-level connection rule for V− in single-supply use beyond"
        ],
        "pages_sent": 25,
        "cost_usd": 0.1089,
        "at": "2026-10-11T01:28:51"
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      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/ina321",
        "pages": 25,
        "sha256": "2363d452254a2876",
        "source_tier": "lcsc"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 14,
        "described": 14,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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}