ADS8638SRGER

{
  "schema_version": 1,
  "type": "component",
  "slug": "ads8638srger",
  "title": "ADS8638SRGER",
  "brief": "Texas Instruments Analog To Digital Converters (ADC), QFN-24-EP(4x4). 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",
    "data acquisition",
    "ads8638srger",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "ADS8638SRGER",
    "manufacturer": "Texas Instruments",
    "package": "QFN-24-EP(4x4)",
    "pin_count": 25,
    "category": "Data Acquisition",
    "subcategory": "Analog To Digital Converters (ADC)",
    "datasheet": "https://www.ti.com/cn/lit/gpn/ads8638",
    "parts": {
      "symbol": "ads8638srger.kicad_sym",
      "footprint": "ads8638srger.kicad_mod",
      "model_3d": "ads8638srger-etched.glb",
      "model_3d_plain": "ads8638srger.glb",
      "model_3d_step": "ads8638srger-etched.step",
      "model_3d_step_plain": "ads8638srger.step",
      "lbr": "ads8638srger.lbr"
    },
    "distributor_links": {
      "lcsc": "C181245"
    },
    "pins": [
      {
        "number": "1",
        "name": "AVDD",
        "type": "power_in",
        "description": "Analog power supply; supply voltage range 2.7V to 5.25V."
      },
      {
        "number": "2",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground connection for analog circuits."
      },
      {
        "number": "3",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground connection for analog circuits."
      },
      {
        "number": "4",
        "name": "NC",
        "type": "unconnected",
        "description": "Not internally connected; must not float and should be connected to AGND."
      },
      {
        "number": "5",
        "name": "AINGND",
        "type": "power_in",
        "description": "Analog input ground sense terminal for all input channels; operates within ±0.2V of system ground."
      },
      {
        "number": "6",
        "name": "AIN7",
        "type": "input",
        "description": "Analog input channel 7; voltage range software-selectable from ±10V, ±5V, ±2.5V, 0-5V, or 0-10V."
      },
      {
        "number": "7",
        "name": "AIN6",
        "type": "input",
        "description": "Analog input channel 6; voltage range software-selectable from ±10V, ±5V, ±2.5V, 0-5V, or 0-10V."
      },
      {
        "number": "8",
        "name": "AIN5",
        "type": "input",
        "description": "Analog input channel 5; voltage range software-selectable from ±10V, ±5V, ±2.5V, 0-5V, or 0-10V."
      },
      {
        "number": "9",
        "name": "AIN4",
        "type": "input",
        "description": "Analog input channel 4; voltage range software-selectable from ±10V, ±5V, ±2.5V, 0-5V, or 0-10V."
      },
      {
        "number": "10",
        "name": "AIN3",
        "type": "input",
        "description": "Analog input channel 3; voltage range software-selectable from ±10V, ±5V, ±2.5V, 0-5V, or 0-10V."
      },
      {
        "number": "11",
        "name": "AIN2",
        "type": "input",
        "description": "Analog input channel 2; voltage range software-selectable from ±10V, ±5V, ±2.5V, 0-5V, or 0-10V."
      },
      {
        "number": "12",
        "name": "AIN1",
        "type": "input",
        "description": "Analog input channel 1; voltage range software-selectable from ±10V, ±5V, ±2.5V, 0-5V, or 0-10V."
      },
      {
        "number": "13",
        "name": "AIN0",
        "type": "input",
        "description": "Analog input channel 0; voltage range software-selectable from ±10V, ±5V, ±2.5V, 0-5V, or 0-10V."
      },
      {
        "number": "14",
        "name": "HVDD",
        "type": "power_in",
        "description": "High-voltage positive supply for multiplexer channels; range 5V to 15V with (HVDD - HVSS) restricted to 10V to 30V."
      },
      {
        "number": "15",
        "name": "HVSS",
        "type": "power_in",
        "description": "High-voltage negative supply for multiplexer channels; range -15V to 0V with (HVDD - HVSS) restricted to 10V to 30V."
      },
      {
        "number": "16",
        "name": "CS",
        "type": "input",
        "description": "Chip select digital input; active-low signal that controls frame synchronization and conversion start."
      },
      {
        "number": "17",
        "name": "SCLK",
        "type": "input",
        "description": "Serial clock input; maximum frequency 20MHz at DVDD = 3.3V; controls data shift timing and conversion."
      },
      {
        "number": "18",
        "name": "DIN",
        "type": "input",
        "description": "Serial data input; 16-bit command words latched on SCLK rising edges for device configuration and control."
      },
      {
        "number": "19",
        "name": "DOUT",
        "type": "tri_state",
        "description": "Serial data output; 16-bit conversion results or register data shifted out on SCLK falling edges; transitions to high-Z when CS is high."
      },
      {
        "number": "20",
        "name": "DGND",
        "type": "power_in",
        "description": "Digital ground connection for digital circuits."
      },
      {
        "number": "21",
        "name": "DVDD",
        "type": "power_in",
        "description": "Digital I/O power supply; supply voltage range 1.65V to 5.25V."
      },
      {
        "number": "22",
        "name": "AL_PD",
        "type": "bidirectional",
        "description": "Programmable pin functioning as active-high alarm output or active-low asynchronous power-down input; features internal pull-up to DVDD when configured as input."
      },
      {
        "number": "23",
        "name": "REFGND",
        "type": "power_in",
        "description": "Reference ground terminal; provides return path for external reference circuit or decoupling ground for internal reference."
      },
      {
        "number": "24",
        "name": "REF",
        "type": "input",
        "description": "Voltage reference input; accepts 2.0V to 3.0V external reference or serves as decoupling terminal for internal 2.5V precision reference."
      },
      {
        "number": "25",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.2",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.2",
        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "exposed pad 25 added from the footprint"
        ],
        "pages_sent": 75,
        "cost_usd": 0.8323,
        "at": "2026-09-23T01:27:45"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/ads8638",
        "pages": 75,
        "sha256": "88befd8fff5977e4",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 25,
        "described": 25,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "ads8638srger.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.0,
          4.0,
          0.77
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "096fc110543e6d324c5120c2d38e3dca87a389da9b6fac234f1fe40856295ef4",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ads8638srger-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
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        "extents_mm": [
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        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "a924e61ede0184bca58ae2434da4d8a976e61e098b86aa2f5fa37f35ad491c69",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "QFN-24-EP(4x4)",
      "Category": "Data Acquisition",
      "Pins": "25"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "ads8638srger"
  ],
  "discovery_pitch": "ADS8638SRGER (Texas Instruments) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
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    "path": "docs/hero.png"
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    "ads8638srger.lbr",
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    "docs/ads8638srger-datasheet.pdf",
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  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-24T16:02:25.572Z"
}