INA253

{
  "schema_version": 1,
  "type": "component",
  "slug": "ina253",
  "title": "INA253",
  "brief": "TI current-sense amplifier with integrated precision shunt, TSSOP-20. -4 to 80 V, 15 A, bidirectional. Datasheet-verified.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "amplifier",
    "current-sense",
    "integrated-shunt",
    "tssop-20",
    "texas-instruments"
  ],
  "component": {
    "mpn": "INA253",
    "manufacturer": "Texas Instruments",
    "package": "TSSOP-20",
    "pin_count": 20,
    "category": "Amplifier",
    "subcategory": "Current-sense amplifier",
    "datasheet": "https://www.ti.com/lit/ds/symlink/ina253.pdf",
    "parts": {
      "symbol": "ina253.kicad_sym",
      "footprint": "ina253.kicad_mod",
      "model_3d": "ina253-etched.glb",
      "model_3d_plain": "ina253.glb",
      "model_3d_step": "ina253-etched.step",
      "model_3d_step_plain": "ina253.step",
      "lbr": "ina253.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "IS-",
        "type": "passive",
        "description": "Load-side terminal of the integrated 2-mΩ shunt resistor. Connect to load. Pins 1, 2, and 3 are internally tied together as one side of the shunt."
      },
      {
        "number": "2",
        "name": "IS-",
        "type": "passive",
        "description": "Load-side terminal of the integrated 2-mΩ shunt resistor. Connect to load."
      },
      {
        "number": "3",
        "name": "IS-",
        "type": "passive",
        "description": "Load-side terminal of the integrated 2-mΩ shunt resistor. Connect to load."
      },
      {
        "number": "4",
        "name": "SH-",
        "type": "output",
        "description": "Kelvin sense output from the load-side of the internal shunt resistor. Connect to IN- directly if no filtering is needed."
      },
      {
        "number": "5",
        "name": "IN-",
        "type": "input",
        "description": "Amplifier differential input from the load side of the shunt resistor. Common-mode range -4 V to +80 V."
      },
      {
        "number": "6",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground reference."
      },
      {
        "number": "7",
        "name": "DNC1",
        "type": "unconnected",
        "description": "Do Not Connect. Leave floating; do not tie to any potential."
      },
      {
        "number": "8",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect."
      },
      {
        "number": "9",
        "name": "VS",
        "type": "power_in",
        "description": "Power supply input, 2.7 V to 5.5 V. Draws up to 2.4 mA quiescent current."
      },
      {
        "number": "10",
        "name": "REF2",
        "type": "input",
        "description": "Reference voltage 2 input, 0 V to VS. Sets the output reference along with REF1 for bidirectional current sensing."
      },
      {
        "number": "11",
        "name": "REF1",
        "type": "input",
        "description": "Reference voltage 1 input, 0 V to VS. Sets the output reference along with REF2 for bidirectional current sensing."
      },
      {
        "number": "12",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect."
      },
      {
        "number": "13",
        "name": "OUT",
        "type": "output",
        "description": "Analog output voltage proportional to sensed current times the gain (100/200/400 mV/A depending on A1/A2/A3 variant)."
      },
      {
        "number": "14",
        "name": "DNC2",
        "type": "unconnected",
        "description": "Do Not Connect. Leave floating; do not tie to any potential."
      },
      {
        "number": "15",
        "name": "NC",
        "type": "passive",
        "description": "Reserved; connect this pin to GND."
      },
      {
        "number": "16",
        "name": "IN+",
        "type": "input",
        "description": "Amplifier differential input from the supply side of the shunt resistor. Common-mode range -4 V to +80 V."
      },
      {
        "number": "17",
        "name": "SH+",
        "type": "output",
        "description": "Kelvin sense output from the supply-side of the internal shunt resistor. Connect to IN+ directly if no filtering is needed."
      },
      {
        "number": "18",
        "name": "IS+",
        "type": "passive",
        "description": "Supply-side terminal of the integrated 2-mΩ shunt resistor. Connect to supply. Pins 18, 19, and 20 are internally tied together as one side of the shunt."
      },
      {
        "number": "19",
        "name": "IS+",
        "type": "passive",
        "description": "Supply-side terminal of the integrated 2-mΩ shunt resistor. Connect to supply."
      },
      {
        "number": "20",
        "name": "IS+",
        "type": "passive",
        "description": "Supply-side terminal of the integrated 2-mΩ shunt resistor. Connect to supply."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/ina253.pdf",
        "pages": 36,
        "sha256": "f316d2de54cc0924",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 20,
        "described": 20,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
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        "file": "ina253.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "97339947f3a7196470ec2f1d9f9b92bb2fc2ab66ad53be0cf105192585ef3c9a",
        "checked": "2026-10-07",
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      {
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        "origin": "footprint origin = pad-pattern centre",
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        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Type": "Current-sense amplifier with integrated shunt",
      "Shunt": "2 mOhm integrated",
      "Common-mode range": "-4 V to 80 V",
      "Continuous current": "15 A",
      "Direction": "Bidirectional (via REF)",
      "Gain": "Fixed (part option)",
      "Supply": "2.7-5.5 V",
      "Package": "TSSOP-20"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "ina253",
    "integrated shunt current sensor",
    "current sense amp with resistor",
    "precision current measurement"
  ],
  "discovery_pitch": "TI INA253 current-sense amplifier with integrated shunt (TSSOP-20) with datasheet-verified pinout, KiCad symbol/footprint/3D, and full provenance.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
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    "type": "image",
    "path": "docs/hero.png"
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  "files": [
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    "ina253.lbr",
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  "variants": [
    {
      "mpn": "INA253A2PW (gain 2 V/A)",
      "kind": "packaging"
    },
    {
      "mpn": "INA253A3PW (gain 4 V/A)",
      "kind": "packaging"
    },
    {
      "mpn": "INA253A4PW (gain 8 V/A)",
      "kind": "packaging"
    }
  ]
}