ADS7844NB

{
  "slug": "ads7844nb",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Analog To Digital Converters (ADCs), SSOP-20-208mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "adc-dac-data conversion",
    "ads7844nb",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ads7844nb.kicad_sym",
    "ads7844nb.kicad_mod",
    "ads7844nb.glb",
    "ads7844nb.step",
    "ads7844nb.lbr",
    "docs/hero.png",
    "docs/ads7844nb-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ads7844nb-hero.glb",
    "ads7844nb-hero.overlay.json",
    "ads7844nb-etched.glb"
  ],
  "component": {
    "mpn": "ADS7844NB",
    "manufacturer": "Texas Instruments",
    "package": "SSOP-20-208mil",
    "pin_count": 20,
    "category": "ADC/DAC/Data Conversion",
    "subcategory": "Analog To Digital Converters (ADCs)",
    "datasheet": "https://www.ti.com/lit/ds/symlink/ads7844nb.pdf",
    "parts": {
      "symbol": "ads7844nb.kicad_sym",
      "footprint": "ads7844nb.kicad_mod",
      "model_3d": "ads7844nb-hero.glb",
      "model_3d_plain": "ads7844nb-etched.glb",
      "model_3d_step": "ads7844nb-etched.step",
      "model_3d_step_plain": "ads7844nb.step",
      "lbr": "ads7844nb.lbr"
    },
    "distributor_links": {
      "lcsc": "C2870182",
      "digikey": "ADS7844NB-ND",
      "mouser": "595-ADS7844NB"
    },
    "distributor_check": {
      "checked_at": "2026-11-02T17:46:12Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "ADS7844NB-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "595-ADS7844NB",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "CH0",
        "type": "input",
        "description": "Analog input channel 0."
      },
      {
        "number": "2",
        "name": "CH1",
        "type": "input",
        "description": "Analog input channel 1."
      },
      {
        "number": "3",
        "name": "CH2",
        "type": "input",
        "description": "Analog input channel 2."
      },
      {
        "number": "4",
        "name": "CH3",
        "type": "input",
        "description": "Analog input channel 3."
      },
      {
        "number": "5",
        "name": "CH4",
        "type": "input",
        "description": "Analog input channel 4."
      },
      {
        "number": "6",
        "name": "CH5",
        "type": "input",
        "description": "Analog input channel 5."
      },
      {
        "number": "7",
        "name": "CH6",
        "type": "input",
        "description": "Analog input channel 6."
      },
      {
        "number": "8",
        "name": "CH7",
        "type": "input",
        "description": "Analog input channel 7."
      },
      {
        "number": "9",
        "name": "COM",
        "type": "input",
        "description": "Ground reference for analog inputs that sets the zero code voltage in single-ended mode and is connected to ground or a ground reference point."
      },
      {
        "number": "10",
        "name": "SHDN",
        "type": "input",
        "description": "Shutdown input; when LOW the device enters a very low power shutdown mode."
      },
      {
        "number": "11",
        "name": "VREF",
        "type": "power_in",
        "description": "Voltage reference input, with the allowed range given in the Specification Table (0.1V to +VCC)."
      },
      {
        "number": "12",
        "name": "+VCC",
        "type": "power_in",
        "description": "Power supply, 2.7V to 5V."
      },
      {
        "number": "13",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "14",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "15",
        "name": "DOUT",
        "type": "tri_state",
        "description": "Serial data output, shifted out on the falling edge of DCLK and high impedance when CS is high."
      },
      {
        "number": "16",
        "name": "BUSY",
        "type": "tri_state",
        "description": "Busy output that goes low while the DIN control bits are being read and while the device is converting, and is high impedance when CS is high."
      },
      {
        "number": "17",
        "name": "DIN",
        "type": "input",
        "description": "Serial data input, latched on the rising edge of DCLK when CS is LOW."
      },
      {
        "number": "18",
        "name": "CS",
        "type": "input",
        "description": "Active-low chip select; data is not clocked into DIN unless CS is low, and DOUT is high impedance when CS is high."
      },
      {
        "number": "19",
        "name": "DCLK",
        "type": "input",
        "description": "External clock input whose speed sets the conversion rate by fCLK = 16 • fSAMPLE."
      },
      {
        "number": "20",
        "name": "+VCC",
        "type": "power_in",
        "description": "Power supply."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Pin 19 is labelled CLK in the pin description table but DCLK in the pin configuration diagram and in; The MPN ADS7844NB is listed on page 4 as SSOP-20 package DB, so the pinout is taken from the page 4 "
        ],
        "pages_sent": 8,
        "cost_usd": 0.0185,
        "at": "2026-11-02T17:46:01"
      },
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/ads7844nb.pdf",
        "pages": 24,
        "sha256": "d9251b91ea7e95a8",
        "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": [
      {
        "file": "ads7844nb.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.8,
          7.2,
          2.1
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "c9a01a276d0b4d9561efd58f2fcee56f52c1b6ab464ea7a0380cab4e87a924e6",
        "checked": "2026-11-02",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ads7844nb-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.8,
          7.2,
          2.1
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "51b59f8df4c9f60a28c8af6652ba5fc57c96523722bcc7a90e55fa5496106141",
        "checked": "2026-11-02",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}