Tenet Technetronics introduces MCP3008 Breakout board in which, this device is a successive approximation 10-bit Analog to-Digital (A/D) converter with on-board sample and hold circuitry. The MCP3008 is programmable to provide four pseudo-differential input pairs or eight single-ended inputs. Differential Non linearity (DNL) and Integral Non linearity (INL) are specified at ±1 LSB. Communication with the devices is accomplished using a simple serial interface compatible with the SPI protocol. The device is capable of conversion rates of up to 200 ksps. The MCP3008 device operates over a broad voltage range (2.7V – 5.5V). Low-current design permits operation with typical standby currents of only 5 nA and typical active currents of 320 µA.
Teaching the Raspberry Pi how to read analog inputs is easier than you think! The Pi does not include a hardware analog-to-digital converter, but an external ADC (such as the MCP3008) can be used, along with some bit banged SPI code in Python to read external analog devices.
Here is a short list of some analog inputs that could be used with this Breakout board:
- force sensitive resistor (FSR)
- temperature sensor
- 2-axis joystick and many more
Interfacing MCP3008 with 8 different sensors:
Here we are interfacing the MCP3008 breakout with 8 analog sensors with raspberry pi and we are making use of all 8 input channels of the the MCP3008 and shown the output in a serial window.
Breakout board Features:
- 10-bit resolution
- On-chip sample and hold
- SPI serial interface (modes 0,0 and 1,1)
- Single supply operation: 2.7V – 5.5V
- 200 ksps max. sampling rate at VDD = 5V
- 75 ksps max. sampling rate at VDD = 2.7V
- Low power CMOS technology
- 5 nA typical standby current, 2 µA max