MCP3008

{
  "schema_version": 1,
  "type": "component",
  "slug": "mcp3008",
  "title": "MCP3008",
  "brief": "Microchip 8-channel 10-bit SPI ADC, SOIC-16. 200 ksps, single-ended or differential. The Raspberry Pi ADC. Datasheet-verified.",
  "version": "0.1.3",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "data-converter",
    "adc",
    "spi",
    "8-channel",
    "soic-16",
    "microchip"
  ],
  "component": {
    "mpn": "MCP3008",
    "manufacturer": "Microchip Technology",
    "package": "SOIC-16",
    "pin_count": 16,
    "category": "Data Converter",
    "subcategory": "8-channel 10-bit SPI ADC",
    "datasheet": "https://ww1.microchip.com/downloads/en/DeviceDoc/21295d.pdf",
    "parts": {
      "symbol": "mcp3008.kicad_sym",
      "footprint": "mcp3008.kicad_mod",
      "model_3d": "mcp3008-etched.glb",
      "model_3d_plain": "mcp3008.glb",
      "lbr": "mcp3008.lbr",
      "model_3d_step": "mcp3008-etched.step",
      "model_3d_step_plain": "mcp3008.step"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "CH0",
        "type": "input",
        "description": "Analog input channel 0. Single-ended input (VSS..VREF) or IN+/IN- of pseudo-differential pair with CH1. Sample cap ~20 pF, switch resistance ~1 kΩ."
      },
      {
        "number": "2",
        "name": "CH1",
        "type": "input",
        "description": "Analog input channel 1. Single-ended input (VSS..VREF) or IN+/IN- of pseudo-differential pair with CH0."
      },
      {
        "number": "3",
        "name": "CH2",
        "type": "input",
        "description": "Analog input channel 2. Single-ended input (VSS..VREF) or IN+/IN- of pseudo-differential pair with CH3."
      },
      {
        "number": "4",
        "name": "CH3",
        "type": "input",
        "description": "Analog input channel 3. Single-ended input (VSS..VREF) or IN+/IN- of pseudo-differential pair with CH2."
      },
      {
        "number": "5",
        "name": "CH4",
        "type": "input",
        "description": "Analog input channel 4. Single-ended input (VSS..VREF) or IN+/IN- of pseudo-differential pair with CH5."
      },
      {
        "number": "6",
        "name": "CH5",
        "type": "input",
        "description": "Analog input channel 5. Single-ended input (VSS..VREF) or IN+/IN- of pseudo-differential pair with CH4."
      },
      {
        "number": "7",
        "name": "CH6",
        "type": "input",
        "description": "Analog input channel 6. Single-ended input (VSS..VREF) or IN+/IN- of pseudo-differential pair with CH7."
      },
      {
        "number": "8",
        "name": "CH7",
        "type": "input",
        "description": "Analog input channel 7. Single-ended input (VSS..VREF) or IN+/IN- of pseudo-differential pair with CH6."
      },
      {
        "number": "9",
        "name": "DGND",
        "type": "power_in",
        "description": "Digital ground connection to internal digital circuitry. Tie to the system ground plane (typically joined to AGND at a single point near the device)."
      },
      {
        "number": "10",
        "name": "~{CS}/SHDN",
        "type": "input",
        "description": "Active-low SPI chip select / shutdown input. Falling edge initiates a conversion cycle; driving high ends the conversion and places the device in low-power standby (typ. 5 nA). Must be held high between conversions."
      },
      {
        "number": "11",
        "name": "DIN",
        "type": "input",
        "description": "SPI serial data input (MOSI). Used to clock in the start bit, single/differential select, and 3-bit channel configuration word. Sampled on the rising edge of CLK."
      },
      {
        "number": "12",
        "name": "DOUT",
        "type": "output",
        "description": "SPI serial data output (MISO). Shifts out the 10-bit conversion result MSB-first on the falling edge of CLK. High-impedance when CS is high."
      },
      {
        "number": "13",
        "name": "CLK",
        "type": "input",
        "description": "SPI serial clock input. Drives sampling and successive-approximation conversion. Max fCLK 3.6 MHz at VDD=5V, 1.35 MHz at VDD=2.7V; fCLK should stay ≥10 kHz to keep the internal sample cap from drooping."
      },
      {
        "number": "14",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground connection to internal analog circuitry. Tie to the analog ground plane; join to DGND at a single quiet point near the device."
      },
      {
        "number": "15",
        "name": "VREF",
        "type": "input",
        "description": "Reference voltage input. Sets the analog input full-scale range (0..VREF). Allowed range 0.25 V ≤ VREF ≤ VDD. Typical reference current 100 µA at VREF=5V; decouple with a low-ESR capacitor."
      },
      {
        "number": "16",
        "name": "VDD",
        "type": "power_in",
        "description": "Positive supply voltage, +2.7V to +5.5V. Typ IDD 425 µA at 5V / 225 µA at 2.7V; standby current 5 nA typ, 2 µA max. Bypass with a 0.1 µF ceramic to AGND close to the pin."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://ww1.microchip.com/downloads/en/DeviceDoc/21295d.pdf",
        "pages": 40,
        "sha256": "e6c2231de727395f",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      },
      "review_fix": {
        "at": "2026-11-10",
        "by": "part-reviewer (Ray review)",
        "what": "pin names set to the maker spelling from Microchip 21295D Package Types, MCP3008 PDIP/SOIC: 1 on the page, 4 on the symbol (numbers unchanged)."
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "mcp3008.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          9.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "d5eeddb4c0b304dc61950919b126fc61d7586abd5f16ab71a2a79759ec6498bf",
        "checked": "2026-11-10",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "mcp3008-etched.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          9.9,
          1.78
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "26093c708236a9726fc0c20d5d09106dfc7c6f8bc1494d3930ca9c071ec31303",
        "checked": "2026-11-10",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Type": "8-channel SAR ADC",
      "Resolution": "10-bit",
      "Sample rate": "200 ksps (at 5 V)",
      "Inputs": "8 single-ended or 4 pseudo-differential",
      "Interface": "SPI (up to 3.6 MHz)",
      "Reference": "external VREF pin",
      "Supply voltage": "2.7-5.5 V",
      "Package": "SOIC-16"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "mcp3008",
    "8 channel adc",
    "spi adc",
    "raspberry pi adc",
    "10-bit adc"
  ],
  "discovery_pitch": "MCP3008 8-channel 10-bit SPI ADC (SOIC-16) with datasheet-verified pinout, KiCad symbol/footprint/3D, and full provenance.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "mcp3008.kicad_sym",
    "mcp3008.kicad_mod",
    "mcp3008.glb",
    "mcp3008.lbr",
    "docs/hero.png",
    "docs/mcp3008-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "mcp3008-etched.step",
    "mcp3008-etched.glb",
    "mcp3008.step"
  ],
  "variants": [
    {
      "mpn": "MCP3008-I/SL (SOIC-16)",
      "kind": "packaging"
    },
    {
      "mpn": "MCP3008-I/P (PDIP-16)",
      "kind": "packaging"
    }
  ],
  "description": "Microchip 8-channel 10-bit SPI ADC, SOIC-16. 200 ksps, single-ended or differential. The Raspberry Pi ADC. Datasheet-verified.",
  "org": "adom"
}