AD2018

{
  "slug": "ad2018",
  "version": "0.1.0",
  "type": "component",
  "description": "IDCHIP(英锐芯) Audio Amplifiers, ESOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "amplifiers-comparators",
    "ad2018",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ad2018.kicad_sym",
    "ad2018.kicad_mod",
    "ad2018.glb",
    "ad2018.step",
    "ad2018.lbr",
    "docs/hero.png",
    "docs/ad2018-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ad2018-hero.glb",
    "ad2018-hero.overlay.json",
    "ad2018-etched.glb"
  ],
  "component": {
    "mpn": "AD2018",
    "manufacturer": "IDCHIP(英锐芯)",
    "package": "ESOP-8",
    "pin_count": 9,
    "category": "Amplifiers/Comparators",
    "subcategory": "Audio Amplifiers",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8604433290065690624",
    "parts": {
      "symbol": "ad2018.kicad_sym",
      "footprint": "ad2018.kicad_mod",
      "model_3d": "ad2018-hero.glb",
      "model_3d_plain": "ad2018-etched.glb",
      "model_3d_step": "ad2018-etched.step",
      "model_3d_step_plain": "ad2018.step",
      "lbr": "ad2018.lbr"
    },
    "distributor_links": {
      "lcsc": "C42371020"
    },
    "distributor_check": {
      "checked_at": "2026-10-25T04:10:45Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "SD",
        "type": "input",
        "description": "Shutdown control: a logic high (VIH min 2.2 V) puts the amplifier into shutdown with outputs disconnected from the speaker, a logic low (VIL max 0.2 V) gives normal operation, and the pin must not be left floating."
      },
      {
        "number": "2",
        "name": "BYP",
        "type": "output",
        "description": "Bias voltage output at VDD/2 that must be filtered with a CB capacitor, where 0.1 µF to 1 µF ceramic is the general range and 1 µF or larger is recommended to limit turn-on noise."
      },
      {
        "number": "3",
        "name": "MODE",
        "type": "input",
        "description": "Operating mode control: a logic high (VIH min 2.2 V) selects Class-D operation, a logic low (VIL max 0.2 V) selects Class-AB, and the pin has an internal ~1.1 MΩ pull-up, so an MCU driving it in standby needs a 10 kΩ pull-down to GND."
      },
      {
        "number": "4",
        "name": "IN",
        "type": "input",
        "description": "Single-ended analog audio input whose gain is set by the external input resistor Ri (AVD = 2×150 kΩ / (5 kΩ + Ri)) with an input coupling capacitor Ci forming the high-pass corner."
      },
      {
        "number": "5",
        "name": "VO1",
        "type": "output",
        "description": "Analog BTL output 1 that drives the speaker together with VO2; an optional LC filter may be added when the speaker trace exceeds about 100 mm."
      },
      {
        "number": "6",
        "name": "VDD",
        "type": "power_in",
        "description": "Positive power supply with an operating range of 2.5 V to 5.0 V and an absolute maximum of 5.5 V, to be decoupled close to the pin."
      },
      {
        "number": "7",
        "name": "GND",
        "type": "power_in",
        "description": "Power ground for the amplifier and its supply decoupling."
      },
      {
        "number": "8",
        "name": "VO2",
        "type": "output",
        "description": "Analog BTL output 2 that drives the speaker together with VO1 in the bridge-tied output stage."
      },
      {
        "number": "9",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "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: Figure 2 (pin definition diagram) is an image and was not readable in the text. Pin numbers, names a; The datasheet gives no explicit ERC type for BYP; it is described only as a 偏置电压输出端 (bias voltage ou; Pin 3 MODE pull-up and 10 kΩ pull-down guidance come from the application note on page 7, not from t",
          "exposed pad 9 added from the footprint"
        ],
        "pages_sent": 8,
        "cost_usd": 0.0604,
        "at": "2026-10-25T04:10:29"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8604433290065690624",
        "pages": 8,
        "sha256": "4b5f89c28434cfa7",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 9,
        "described": 9,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "ad2018.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.9,
          4.9,
          1.65
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "f1718a42c5ea007e8e2dd672ac39a1bb358ee4849bd53c42e21ce83e0e5df7a9",
        "checked": "2026-10-25",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ad2018-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.9,
          4.9,
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        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "2d4be7c4aa8f13391ed09ce39eddaab91d1e36632d090256d8cc31f0d8b6e64f",
        "checked": "2026-10-25",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}