DAC902U

{
  "slug": "dac902u",
  "version": "0.1.1",
  "type": "component",
  "description": "Texas Instruments Digital To Analog Converters (DACs), SOIC-28-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "data converters",
    "dac902u",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "dac902u.kicad_sym",
    "dac902u.kicad_mod",
    "dac902u.glb",
    "dac902u.step",
    "dac902u.lbr",
    "docs/hero.png",
    "docs/dac902u-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "dac902u-hero.glb",
    "dac902u-hero.overlay.json",
    "dac902u-etched.glb",
    "dac902u-etched.step"
  ],
  "component": {
    "mpn": "DAC902U",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-28-300mil",
    "pin_count": 28,
    "category": "Data Converters",
    "subcategory": "Digital To Analog Converters (DACs)",
    "datasheet": "https://www.ti.com/lit/ds/symlink/dac902u.pdf",
    "parts": {
      "symbol": "dac902u.kicad_sym",
      "footprint": "dac902u.kicad_mod",
      "model_3d": "dac902u-hero.glb",
      "model_3d_plain": "dac902u-etched.glb",
      "model_3d_step": "dac902u-etched.step",
      "model_3d_step_plain": "dac902u.step",
      "lbr": "dac902u.lbr"
    },
    "distributor_links": {
      "lcsc": "C1555011",
      "digikey": "2156-DAC902U-ND",
      "mouser": "595-DAC902U"
    },
    "distributor_check": {
      "checked_at": "2026-10-31T06:23:03Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "2156-DAC902U-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-DAC902U",
        "status": "found",
        "lifecycle": "End of Life"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "Bit 1 (D11)",
        "type": "input",
        "description": "Data bit 1 (D11), the MSB of the 12-bit data input."
      },
      {
        "number": "2",
        "name": "Bit 2 (D10)",
        "type": "input",
        "description": "Data bit 2 (D10) of the 12-bit data input."
      },
      {
        "number": "3",
        "name": "Bit 3 (D9)",
        "type": "input",
        "description": "Data bit 3 (D9) of the 12-bit data input."
      },
      {
        "number": "4",
        "name": "Bit 4 (D8)",
        "type": "input",
        "description": "Data bit 4 (D8) of the 12-bit data input."
      },
      {
        "number": "5",
        "name": "Bit 5 (D7)",
        "type": "input",
        "description": "Data bit 5 (D7) of the 12-bit data input."
      },
      {
        "number": "6",
        "name": "Bit 6 (D6)",
        "type": "input",
        "description": "Data bit 6 (D6) of the 12-bit data input."
      },
      {
        "number": "7",
        "name": "Bit 7 (D5)",
        "type": "input",
        "description": "Data bit 7 (D5) of the 12-bit data input."
      },
      {
        "number": "8",
        "name": "Bit 8 (D4)",
        "type": "input",
        "description": "Data bit 8 (D4) of the 12-bit data input."
      },
      {
        "number": "9",
        "name": "Bit 9 (D3)",
        "type": "input",
        "description": "Data bit 9 (D3) of the 12-bit data input."
      },
      {
        "number": "10",
        "name": "Bit 10 (D2)",
        "type": "input",
        "description": "Data bit 10 (D2) of the 12-bit data input."
      },
      {
        "number": "11",
        "name": "Bit 11 (D1)",
        "type": "input",
        "description": "Data bit 11 (D1) of the 12-bit data input."
      },
      {
        "number": "12",
        "name": "Bit 12 (D0)",
        "type": "input",
        "description": "Data bit 12 (D0), the LSB of the 12-bit data input."
      },
      {
        "number": "13",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection."
      },
      {
        "number": "14",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection."
      },
      {
        "number": "15",
        "name": "PD",
        "type": "input",
        "description": "Power-down control input, active HIGH, with an internal pull-down circuit; may be left unconnected if not used."
      },
      {
        "number": "16",
        "name": "INT/EXT",
        "type": "input",
        "description": "Reference select pin: internal (=0) or external (=1) reference operation."
      },
      {
        "number": "17",
        "name": "REFIN",
        "type": "bidirectional",
        "description": "Reference input/output; see the Applications section of the datasheet for details."
      },
      {
        "number": "18",
        "name": "FSA",
        "type": "input",
        "description": "Full-scale output adjust; one external resistor sets the full-scale current over 2mA to 20mA."
      },
      {
        "number": "19",
        "name": "BW",
        "type": "passive",
        "description": "Bandwidth/noise reduction pin; bypass with 0.1µF to +VA for optimum performance."
      },
      {
        "number": "20",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground."
      },
      {
        "number": "21",
        "name": "~{IOUT}",
        "type": "output",
        "description": "Complementary DAC current output (the datasheet's overbarred IOUT)."
      },
      {
        "number": "22",
        "name": "IOUT",
        "type": "output",
        "description": "DAC current output."
      },
      {
        "number": "23",
        "name": "BYP",
        "type": "passive",
        "description": "Bypass node; use 0.1µF to AGND."
      },
      {
        "number": "24",
        "name": "+VA",
        "type": "power_in",
        "description": "Analog supply voltage, 2.7V to 5.5V."
      },
      {
        "number": "25",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection."
      },
      {
        "number": "26",
        "name": "DGND",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "27",
        "name": "+VD",
        "type": "power_in",
        "description": "Digital supply voltage, 2.7V to 5.5V."
      },
      {
        "number": "28",
        "name": "CLK",
        "type": "input",
        "description": "Clock input; data is latched on the rising edge of the clock."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The pin table text loses the overbar, so pins 21 and 22 both print as IOUT. The description column s; The datasheet pin table lists one pinout for 'SO, TSSOP'. The SO-28 package is DAC902U, and the adde; Pin types for REFIN (input/output) and BW (bypass) are inferred from their descriptions."
        ],
        "pages_sent": 8,
        "cost_usd": 0.1098,
        "at": "2026-10-31T06:22:32"
      },
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/dac902u.pdf",
        "pages": 26,
        "sha256": "6db60c11e6789c94",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 28,
        "described": 28,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "dac902u.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          10.3,
          17.9,
          2.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "b889a13dbe9ec59e79fa9f1b5118b00bfa54f9582392335ff3365b64afc264b1",
        "checked": "2026-10-31",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "dac902u-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          10.3,
          17.9,
          2.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "89e592a77e1fc1a361bd6c3200bc340d744c866ae531f9bbadcac405272995bb",
        "checked": "2026-10-31",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ],
    "package_dims": {
      "package_code": "DW",
      "E1": {
        "nom_mm": 7.5,
        "range_mm": null
      },
      "E": {
        "nom_mm": 10.3,
        "range_mm": null
      },
      "e": {
        "nom_mm": 1.27,
        "range_mm": null
      },
      "source": "TI package designator DW (no drawing in the datasheet)",
      "model_check": {
        "file": "dac902u.step",
        "verdict": "SKIP",
        "reasons": [
          "the datasheet dimensions give no height or body size to compare"
        ],
        "by": "factory/package_fit.py"
      }
    }
  }
}