INA3221

{
  "schema_version": 1,
  "type": "component",
  "slug": "ina3221",
  "title": "INA3221",
  "brief": "TI 3-channel I2C current and bus-voltage monitor, VQFN-16. 0-26 V, warning + critical alerts. Datasheet-verified.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "sensor",
    "current-sense",
    "power-monitor",
    "i2c",
    "vqfn-16",
    "texas-instruments"
  ],
  "component": {
    "mpn": "INA3221",
    "manufacturer": "Texas Instruments",
    "package": "VQFN-16",
    "pin_count": 17,
    "category": "Sensor",
    "subcategory": "Current / power monitor",
    "datasheet": "https://www.ti.com/lit/ds/symlink/ina3221.pdf",
    "parts": {
      "symbol": "ina3221.kicad_sym",
      "footprint": "ina3221.kicad_mod",
      "model_3d": "ina3221-etched.glb",
      "model_3d_plain": "ina3221.glb",
      "model_3d_step": "ina3221-etched.step",
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      "lbr": "ina3221.lbr"
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    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "IN-3",
        "type": "input",
        "description": "Analog input. Connect to load side of the channel 3 shunt resistor. Bus voltage is the measurement from this pin to ground. Common-mode range 0V to 26V."
      },
      {
        "number": "2",
        "name": "IN+3",
        "type": "input",
        "description": "Analog input. Connect to supply side of the channel 3 shunt resistor. Common-mode range 0V to 26V."
      },
      {
        "number": "3",
        "name": "GND",
        "type": "power_in",
        "description": "Analog ground reference for the device."
      },
      {
        "number": "4",
        "name": "VS",
        "type": "power_in",
        "description": "Power supply, 2.7V to 5.5V. Bypass to GND with a 0.1µF ceramic capacitor."
      },
      {
        "number": "5",
        "name": "A0",
        "type": "input",
        "description": "Digital input. I2C/SMBus address select pin. Connect to GND, SCL, SDA, or VS to select one of four programmable device addresses (see Table 7-1)."
      },
      {
        "number": "6",
        "name": "SCL",
        "type": "input",
        "description": "I2C/SMBus serial clock line. Open-drain input; requires an external pull-up resistor (typ 10kΩ)."
      },
      {
        "number": "7",
        "name": "SDA",
        "type": "bidirectional",
        "description": "I2C/SMBus serial data line. Open-drain input/output; requires an external pull-up resistor (typ 10kΩ)."
      },
      {
        "number": "8",
        "name": "Warning",
        "type": "output",
        "description": "Averaged measurement warning alert. Open-drain digital output; requires an external pull-up resistor to VPU."
      },
      {
        "number": "9",
        "name": "Critical",
        "type": "output",
        "description": "Conversion-triggered critical alert. Open-drain digital output; requires an external pull-up resistor to VPU."
      },
      {
        "number": "10",
        "name": "PV",
        "type": "output",
        "description": "Power valid alert. Open-drain digital output; requires an external pull-up resistor to VPU."
      },
      {
        "number": "11",
        "name": "IN-1",
        "type": "input",
        "description": "Analog input. Connect to load side of the channel 1 shunt resistor. Bus voltage is the measurement from this pin to ground. Common-mode range 0V to 26V."
      },
      {
        "number": "12",
        "name": "IN+1",
        "type": "input",
        "description": "Analog input. Connect to supply side of the channel 1 shunt resistor. Common-mode range 0V to 26V."
      },
      {
        "number": "13",
        "name": "TC",
        "type": "output",
        "description": "Timing control alert. Open-drain digital output; abs-max 26V."
      },
      {
        "number": "14",
        "name": "IN-2",
        "type": "input",
        "description": "Analog input. Connect to load side of the channel 2 shunt resistor. Bus voltage is the measurement from this pin to ground. Common-mode range 0V to 26V."
      },
      {
        "number": "15",
        "name": "IN+2",
        "type": "input",
        "description": "Analog input. Connect to supply side of the channel 2 shunt resistor. Common-mode range 0V to 26V."
      },
      {
        "number": "16",
        "name": "VPU",
        "type": "power_in",
        "description": "Pull-up supply voltage used to bias the power valid (PV) output circuitry and typically the alert open-drain pull-ups."
      },
      {
        "number": "17",
        "name": "Thermal Pad",
        "type": "passive",
        "description": "Exposed thermal pad on package bottom. Must be connected to ground or left floating."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/ina3221.pdf",
        "pages": 50,
        "sha256": "01dd1c52a7675638",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 17,
        "described": 17,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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      "footprint": "viewers/footprint.html"
    },
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        "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": "854ad7ead56d2f04cead5801b806789d0197f3de59fc65546bd4f40791da63a6",
        "checked": "2026-10-07",
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        "role": "eda",
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
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        "checked": "2026-10-07",
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  },
  "metadata": {
    "specs": {
      "Type": "3-channel current / bus-voltage monitor",
      "Channels": "3 (external shunts)",
      "Bus voltage": "0-26 V",
      "Interface": "I2C / SMBus",
      "Alerts": "Warning + critical (open-drain)",
      "Supply": "2.7-5.5 V",
      "Package": "VQFN-16"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "ina3221",
    "3 channel current monitor",
    "triple current sense",
    "i2c power monitor"
  ],
  "discovery_pitch": "TI INA3221 3-channel I2C current/voltage monitor (VQFN-16) with datasheet-verified pinout, KiCad symbol/footprint/3D, and full provenance.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
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    "path": "docs/hero.png"
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  "variants": [
    {
      "mpn": "INA3221AIRGVR (VQFN-16)",
      "kind": "packaging"
    },
    {
      "mpn": "INA3221AIRGVT (VQFN-16, small reel)",
      "kind": "packaging"
    }
  ]
}