INA121U

{
  "schema_version": 1,
  "type": "component",
  "slug": "ina121u",
  "title": "INA121U",
  "brief": "Texas Instruments Instrumentation Amplifiers, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "amplifiers-comparators",
    "ina121u",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "INA121U",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Amplifiers/Comparators",
    "subcategory": "Instrumentation Amplifiers",
    "datasheet": "https://www.ti.com/cn/lit/gpn/ina121",
    "parts": {
      "symbol": "ina121u.kicad_sym",
      "footprint": "ina121u.kicad_mod",
      "model_3d": "ina121u-hero.glb",
      "model_3d_plain": "ina121u.glb",
      "model_3d_step": "ina121u-etched.step",
      "model_3d_step_plain": "ina121u.step",
      "lbr": "ina121u.lbr"
    },
    "distributor_links": {
      "lcsc": "C2057413",
      "digikey": "INA121U-ND",
      "mouser": "595-INA121U"
    },
    "distributor_check": {
      "checked_at": "2026-10-07T08:31:56Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "INA121U-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "595-INA121U",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "RG",
        "type": "passive",
        "description": "Gain-setting resistor terminal; RG connects between pins 1 and 8 to set G = 1 + 50kΩ/RG (1 to 10,000 V/V), leave open for G = 1."
      },
      {
        "number": "2",
        "name": "VIN–",
        "type": "power_in",
        "description": "Inverting input with internal over-voltage protection withstanding up to ±40V, and a ~4pA typical bias current that needs a return path."
      },
      {
        "number": "3",
        "name": "VIN+",
        "type": "power_in",
        "description": "Non-inverting input with internal over-voltage protection withstanding up to ±40V, and a ~4pA typical bias current that needs a return path."
      },
      {
        "number": "4",
        "name": "V–",
        "type": "power_in",
        "description": "Negative supply, with total supply range ±2.25V to ±18V."
      },
      {
        "number": "5",
        "name": "Ref",
        "type": "input",
        "description": "Output reference terminal, normally grounded, which must be a low-impedance connection to preserve CMR (8Ω in series degrades CMR to ~80dB at G = 1)."
      },
      {
        "number": "6",
        "name": "VO",
        "type": "output",
        "description": "Amplifier output referred to Ref, drives 1000pF capacitive load with ±14mA short-circuit current."
      },
      {
        "number": "7",
        "name": "V+",
        "type": "power_in",
        "description": "Positive supply, with total supply range ±2.25V to ±18V."
      },
      {
        "number": "8",
        "name": "RG",
        "type": "passive",
        "description": "Gain-setting resistor terminal; RG connects between pins 1 and 8 to set G = 1 + 50kΩ/RG."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Pin configuration diagram on PAGE 3 has unclear ASCII formatting; pinout determined from circuit sch"
        ],
        "pages_sent": 22,
        "cost_usd": 0.1805,
        "at": "2026-10-07T08:31:39"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/ina121",
        "pages": 22,
        "sha256": "df8d2ff139ef60c7",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "ina121u.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ina121u-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "a0480f353a072d0db8857199a6261c4f248088b1d2545563cd3de1e2a3601982",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SOIC-8",
      "Category": "Amplifiers/Comparators",
      "Pins": "8"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "ina121u"
  ],
  "discovery_pitch": "INA121U (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ina121u.kicad_sym",
    "ina121u.kicad_mod",
    "ina121u.glb",
    "ina121u.step",
    "ina121u.lbr",
    "docs/hero.png",
    "docs/ina121u-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ina121u-hero.glb",
    "ina121u-hero.overlay.json"
  ],
  "visibility": {
    "public": true
  }
}