component
MCP3008
Public Unreviewedby adom
Microchip 8-channel 10-bit SPI ADC, SOIC-16. 200 ksps, single-ended or differential. The Raspberry Pi ADC. Datasheet-verified.
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README.md+57−2@@ -1,5 +1,60 @@ # MCP3008 -10-bit 8-channel SPI ADC, DIP-16+**Microchip Technology** · 8-channel 10-bit SPI ADC · SOIC-16 -The MCP3008 is an 8-channel 10-bit ADC from Microchip with SPI interface. Sample rate up to 200kSPS. A popular choice for adding analog inputs to Raspberry Pi and other SBC projects.+An 8-channel 10-bit analog-to-digital converter with an SPI interface, in a SOIC-16, the standard way to add analog inputs to a Raspberry Pi (which has none of its own). Its successive-approximation core samples up to 200 k samples per second, and the eight inputs can be read as eight single-ended channels or four pseudo-differential pairs. A separate VREF pin sets the full-scale range, and AGND/DGND keep the analog and digital returns clean. The four-wire SPI (CS, DIN, DOUT, CLK) makes it trivial to read from any MCU. Runs 2.7-5.5 V.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | CH0 | input | 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. |+| 2 | CH1 | input | Analog input channel 1. Single-ended input (VSS..VREF) or IN+/IN- of pseudo-differential pair with CH0. |+| 3 | CH2 | input | Analog input channel 2. Single-ended input (VSS..VREF) or IN+/IN- of pseudo-differential pair with CH3. |+| 4 | CH3 | input | Analog input channel 3. Single-ended input (VSS..VREF) or IN+/IN- of pseudo-differential pair with CH2. |+| 5 | CH4 | input | Analog input channel 4. Single-ended input (VSS..VREF) or IN+/IN- of pseudo-differential pair with CH5. |+| 6 | CH5 | input | Analog input channel 5. Single-ended input (VSS..VREF) or IN+/IN- of pseudo-differential pair with CH4. |+| 7 | CH6 | input | Analog input channel 6. Single-ended input (VSS..VREF) or IN+/IN- of pseudo-differential pair with CH7. |+| 8 | CH7 | input | Analog input channel 7. Single-ended input (VSS..VREF) or IN+/IN- of pseudo-differential pair with CH6. |+| 9 | DGND | power_in | Digital ground connection to internal digital circuitry. Tie to the system ground plane (typically joined to AGND at a single point near the device). |+| 10 | CS/SHDN | input | 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. |+| 11 | DIN | input | 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. |+| 12 | DOUT | output | 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. |+| 13 | CLK | input | 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. |+| 14 | AGND | power_in | Analog ground connection to internal analog circuitry. Tie to the analog ground plane; join to DGND at a single quiet point near the device. |+| 15 | VREF | input | 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. |+| 16 | VDD | power_in | 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. |++## Key specifications++| Parameter | Value |+|---|---|+| 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 |++## Ordering variants++- `MCP3008-I/SL (SOIC-16)`+- `MCP3008-I/P (PDIP-16)`++## CAD (KiCad official)++- Symbol: `Analog_ADC:MCP3008`+- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`+- 3D model: SOIC-16 (KiCad packages3D)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Microchip Technology datasheet](https://ww1.microchip.com/downloads/en/DeviceDoc/21295d.pdf) (40 pp, sha256 `e6c2231de727395f`, retrieved 2026-08-17, tier: manufacturer)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/mcp3008-datasheet.pdf)
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package.jsonadded+31@@ -0,0 +1,31 @@+{+ "slug": "mcp3008",+ "version": "0.1.0",+ "type": "component",+ "description": "Microchip 8-channel 10-bit SPI ADC, SOIC-16. 200 ksps, single-ended or differential. The Raspberry Pi ADC. Datasheet-verified.",+ "tags": [+ "component",+ "data-converter",+ "adc",+ "spi",+ "8-channel",+ "soic-16",+ "microchip"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "mcp3008.kicad_sym",+ "mcp3008.kicad_mod",+ "mcp3008.glb",+ "docs/hero.png",+ "docs/mcp3008-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html"+ ]+}
page.json+28−7@@ -4,8 +4,16 @@ "slug": "mcp3008", "title": "MCP3008", "brief": "10-bit 8-channel SPI ADC, DIP-16",- "version": "1.0.0",- "tags": [],+ "version": "0.1.0",+ "tags": [+ "component",+ "data-converter",+ "adc",+ "spi",+ "8-channel",+ "soic-16",+ "microchip"+ ], "license": "MIT", "component": { "mpn": "MCP3008",@@ -20,18 +28,31 @@ }, "readme": "# MCP3008\n\n10-bit 8-channel SPI ADC, DIP-16\n\nThe MCP3008 is an 8-channel 10-bit ADC from Microchip with SPI interface. Sample rate up to 200kSPS. A popular choice for adding analog inputs to Raspberry Pi and other SBC projects.", "author": {- "id": "695820315b5f1e4db2fcf602", "name": "Kyle Bergstedt", "email": "[email protected]" },- "visibility": {- "public": true+ "visibility": "public",+ "hero": {+ "type": "image",+ "path": "docs/hero.png" },- "hero": null, "sample_prompts": [], "discovery_triggers": [], "discovery_pitch": null, "metadata": {}, "created_at": "2026-05-28T05:33:58.641Z",- "updated_at": "2026-05-28T05:33:58.641Z"+ "updated_at": "2026-05-28T05:33:58.641Z",+ "description": "Microchip 8-channel 10-bit SPI ADC, SOIC-16. 200 ksps, single-ended or differential. The Raspberry Pi ADC. Datasheet-verified.",+ "dependencies": {},+ "files": [+ "page.json",+ "README.md",+ "mcp3008.kicad_sym",+ "mcp3008.kicad_mod",+ "mcp3008.glb",+ "docs/hero.png",+ "docs/mcp3008-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html"+ ] }