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Topic: 18 Bit ADC - MCP3421 - I2C Driver ESP8266 (Read 2201 times) previous topic - next topic


MCP3421 is a single channel, low-noise, high accuracy delta-sigma A/D converter with differential inputs and up to 18 bits of resolution in a small SOT-23-6 package. The on-board precision 2.048V reference voltage enables an input range of ±2.048V differentially.

The device uses a two-wire I2C compatible serial interface and operates from a single power supply ranging from 2.7V to 5.5V, has a decent price and looks like a good companion for our ESP8266 module.

I have run some tests and it's looking quite well for a cheap ADC

 1. Test done in filtered environment - stable voltage
2. Test done in noisy environment - using real bus unfiltered voltage

3. Test done in noisy environment - values are printed directly on CBDB DevBoard LCD Display

For more details : http://www.esp8266-projects.com/2015/04/18-bit-adc-mcp3421-i2c-driver-esp8266.html


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