Pimoroni
10-bit ADC (SPI) - 8 Channel
The MCP3008 is a 10-bit analogue-to-digital converter with eight single-ended input channels, communicating via SPI. It's a popular choice for adding analogu...
The MCP3008 is a 10-bit analogue-to-digital converter with eight single-ended input channels, communicating via SPI. It's a popular choice for adding analogue inputs to the Raspberry Pi and other digital-only boards — simply wire it up over SPI and start reading sensor data, potentiometers, or any analogue signal.
With a 200 ksps sample rate at 5V and ultra-low power consumption (5nA standby, 425µA active), the MCP3008 is well suited to both battery-powered and always-on projects. The through-hole DIP package makes it easy to use on breadboards and perfboard.
Key Features
- 10-Bit Resolution – Successive approximation register (SAR) architecture
- 8 Input Channels – Eight single-ended analogue inputs
- SPI Interface – Industry-standard serial communication
- 200 ksps Sample Rate – At 5V supply
- Ultra-Low Power – 5nA typical standby, 425µA typical active
- Wide Temperature Range – -40°C to +85°C operating range
- Through-Hole Package – DIP format for easy breadboard and soldering use
Ideal For
- Adding analogue inputs to Raspberry Pi projects
- Reading sensors, potentiometers, and analogue signals
- Battery-powered data logging
- Prototyping with breadboards
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- kSPS
- kSPS means thousands of samples per second, describing how many readings an ADC can take each second. It matters when choosing a board for fast-changing signals, because slow sensors do not need a high sample rate but audio-like or rapidly varying signals may.
- single-ended input
- An input mode where each analogue signal is measured relative to the board’s ground. It is the simplest and most common way to connect sensors such as potentiometers, but it can be more affected by ground noise or wiring differences.
- SPI
- A fast serial communication bus often used for displays, memory cards, and sensors. It matters because SPI devices need specific pins for clock and data, plus a separate chip-select line for each device.
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