MCP3204 12-Bit SPI ADC

{
  "schema_version": 1,
  "type": "component",
  "slug": "mcp3204",
  "title": "MCP3204 12-Bit SPI ADC",
  "brief": "12-bit 4-channel successive-approximation ADC with an SPI interface.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "adc",
    "sar",
    "12-bit",
    "spi",
    "multichannel",
    "microchip",
    "soic-14"
  ],
  "component": {
    "mpn": "MCP3204",
    "manufacturer": "Microchip",
    "package": "SOIC-14",
    "pin_count": 14,
    "category": "Analog",
    "subcategory": "Analog-to-Digital Converter",
    "datasheet": "https://ww1.microchip.com/downloads/en/DeviceDoc/21298e.pdf",
    "parts": {
      "symbol": "mcp3204.kicad_sym",
      "footprint": "mcp3204.kicad_mod",
      "model_3d": "mcp3204-etched.glb",
      "model_3d_plain": "mcp3204.glb",
      "model_3d_step": "mcp3204-etched.step",
      "model_3d_step_plain": "mcp3204.step",
      "lbr": "mcp3204.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "CH0",
        "type": "input",
        "description": "Analog input channel 0. Usable as a single-ended input (0 V to VREF) or as the IN+ of the CH0/CH1 pseudo-differential pair."
      },
      {
        "number": "2",
        "name": "CH1",
        "type": "input",
        "description": "Analog input channel 1. Usable as a single-ended input (0 V to VREF) or as the IN- of the CH0/CH1 pseudo-differential pair (IN- limited to ±100 mV from VSS)."
      },
      {
        "number": "3",
        "name": "CH2",
        "type": "input",
        "description": "Analog input channel 2. Usable as a single-ended input (0 V to VREF) or as the IN+ of the CH2/CH3 pseudo-differential pair."
      },
      {
        "number": "4",
        "name": "CH3",
        "type": "input",
        "description": "Analog input channel 3. Usable as a single-ended input (0 V to VREF) or as the IN- of the CH2/CH3 pseudo-differential pair (IN- limited to ±100 mV from VSS)."
      },
      {
        "number": "5",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection. Leave floating or tie to ground; do not use as a signal via."
      },
      {
        "number": "6",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection. Leave floating or tie to ground; do not use as a signal via."
      },
      {
        "number": "7",
        "name": "DGND",
        "type": "power_in",
        "description": "Digital ground return for internal digital circuitry. Tie to the system ground plane; keep separate trace back to AGND star point where possible."
      },
      {
        "number": "8",
        "name": "CS/SHDN",
        "type": "input",
        "description": "Active-low chip select / shutdown. Falling edge starts a conversion cycle; must be pulled high between conversions to end conversion and place the device in low-power standby (typ. 500 nA IDDS)."
      },
      {
        "number": "9",
        "name": "DIN",
        "type": "input",
        "description": "SPI serial data input (MOSI). Clocks in the start bit, SGL/DIFF bit, and channel select bits on the rising edge of CLK. SPI modes 0,0 and 1,1 supported."
      },
      {
        "number": "10",
        "name": "DOUT",
        "type": "tri_state",
        "description": "SPI serial data output (MISO). Shifts out the 12-bit conversion result MSB first on the falling edge of CLK. High-impedance when CS is high."
      },
      {
        "number": "11",
        "name": "CLK",
        "type": "input",
        "description": "SPI serial clock. Initiates conversion on the start bit and clocks out each result bit. fCLK max 2.0 MHz at VDD=5V, 1.0 MHz at VDD=2.7V; minimum clock rate limited by sample-cap droop (see Section 6.2)."
      },
      {
        "number": "12",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground return for internal analog circuitry. Tie to a quiet analog ground plane; join to DGND at a single star point."
      },
      {
        "number": "13",
        "name": "VREF",
        "type": "power_in",
        "description": "Reference voltage input. Sets the analog input full-scale range (VREF = full-scale). Valid range 0.25 V to VDD; IREF typ. 100 µA (max 150 µA). Bypass close to the pin."
      },
      {
        "number": "14",
        "name": "VDD",
        "type": "power_in",
        "description": "Positive supply, +2.7 V to +5.5 V. IDD typ. 320 µA (max 400 µA) with DOUT unloaded. Decouple with 0.1 µF close to the pin."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://ww1.microchip.com/downloads/en/DeviceDoc/21298e.pdf",
        "pages": 40,
        "sha256": "89bc1e17c35e2bb1",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 14,
        "described": 14,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "mcp3204.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          8.7,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "3b9a775da256c8afcc28dcddfbc2eb3f266107fe61ce8446d96f2c52b6f44a70",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "mcp3204-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          8.7,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "6f63e6d35675768a54a3686a1df36a176d84622b47babd42d3b586742b848ef9",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Resolution": "12-bit",
      "Architecture": "SAR (successive approximation)",
      "Channels": "4 single-ended / 2 differential",
      "Sample rate": "Up to 100 ksps",
      "Interface": "SPI",
      "Reference": "External",
      "Supply voltage": "2.7 V to 5.5 V",
      "Operating temperature": "-40 C to 85 C"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "12-bit ADC",
    "SPI ADC",
    "4-channel ADC",
    "multichannel measurement"
  ],
  "discovery_pitch": "A 12-bit 4-channel SAR ADC over SPI for reading several analog signals with a simple interface.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "mcp3204.kicad_sym",
    "mcp3204.kicad_mod",
    "mcp3204.glb",
    "mcp3204.step",
    "mcp3204.lbr",
    "docs/hero.png",
    "docs/mcp3204-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "mcp3204-etched.step"
  ],
  "variants": [
    {
      "mpn": "MCP3204I/P",
      "kind": "unknown"
    },
    {
      "mpn": "MCP3204-BI/P",
      "kind": "unknown"
    },
    {
      "mpn": "MCP3204-CI/P",
      "kind": "unknown"
    },
    {
      "mpn": "MCP3204I/SL",
      "kind": "unknown"
    },
    {
      "mpn": "MCP3204-BI/SL",
      "kind": "unknown"
    },
    {
      "mpn": "MCP3204-CI/SL",
      "kind": "unknown"
    },
    {
      "mpn": "MCP3204I/ST",
      "kind": "unknown"
    },
    {
      "mpn": "MCP3204-BI/ST",
      "kind": "unknown"
    },
    {
      "mpn": "MCP3204-CI/ST",
      "kind": "unknown"
    }
  ]
}