Interfacing Mcp3208 With Raspberry Pi

This pi hat is based on the Microchip MCP3208 A/D Converter and has (8) 12-Bit channels accessed via SPI. It supports a sample rate of 100 ksps and has 8 analog inputs in single-ended mode or 4 inputs in differential-pair mode. It has a self-healing poly fuse on the 5V line, filter capacitors, and a power LED. MAX analog input voltage is 5.2v. Learn Interfacing with the Raspberry Pi from University of California, Irvine. The Raspberry Pi uses a variety of input/output devices based on protocols such as HDMI, USB, and Ethernet to communicate with the outside world. In this class you.

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MCP3208

This is a python library designed to work with the MCP3208 ADC using SPI on a Raspberry Pi. The MCP3208 is capable of:

• 12-bit resolution
• ±1 LSB max DNL
• ±1 LSB max INL (MCP3204/3208-B)
• ±2 LSB max INL (MCP3204/3208-C)
• 4 (MCP3204) or 8 (MCP3208) input channels
• Analog inputs programmable as single-ended or pseudo-differential pairs
• On-chip sample and hold
• SPI serial interface (modes 0,0 and 1,1)
• Single supply operation: 2.7V-5.5V
• 100ksps max.sampling rate at VDD = 5V
• 50ksps max. sampling rate at VDD = 2.7V

• Low power CMOS technology

  • 500 nA typical standby current, 2 μA max.
  • 400 μA max. active current at 5V

• Industrial temp range: -40°C to +85°C

For more information, see the datasheet.

Install

The preferred installation method is:

Usage

SPI Interface

This chip uses SPI to interface with the Raspberry Pi. Basically, the chipreturns 12 bits contained in 3 bytes. You are able to read the MCP3208either LSB or MSB first.

MIT License

Copyright (c) 2017 Kevin J. Walchko

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