ADC Unit Analog-to-Digital Converter

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Description

ADC integrated with ADS1100 which is a fully differential, 16-bit, self-calibrating,delta-sigma A/D converter. It communicates through an I2C interface,which means you can collect AD data thru PortA on M5 core from this unit to enhence your A/D performance.

An ADC's work is basically collecting continuous signals from nature like the sound, electromagnetic wave , then convert it into discrete digital signals to become processable data for the MCUs.

The I2C address is 0x48.

Product Specification

  • COMPLETE DATA ACQUISITION SYSTEM IN A TINY SOT23-6 PACKAGE
  • 16-BITS NO MISSING CODES
  • INL: 0.0125% of FSR MAX
  • CONTINUOUS SELF-CALIBRATION
  • SINGLE-CYCLE CONVERSION
  • PROGRAMMABLE GAIN AMPLIFIER GAIN = 1, 2, 4, OR 8
  • LOW NOISE: 4µVp-p
  • PROGRAMMABLE DATA RATE: 8SPS to 128SPS
  • INTERNAL SYSTEM CLOCK
  • I2CTM INTERFACE
  • POWER SUPPLY: 2.7V to 5.5V
  • LOW CURRENT CONSUMPTION: 90µA
  • AVAILABLE IN EIGHT DIFFERENT ADDRESSES
  • Two Lego-compatible holes

Kit includes

  • 1x ADC unit
  • 1x GROVE Cable
  • 1x HT3.96 Male Socket(2 pins)
Documents
Learn

Example

1. Arduino IDE

The below code is incomplete(just for usage). If you want the complete code, please click here.

#include <M5Stack.h>
#include <Wire.h>
#include "ADS1100.h"

#define ADS1100_DEFAULT_ADDRESS 0x48

// declaration
byte error;
int8_t address;

//new a object
ADS1100 ads;

// initialization
M5.begin(true, false, false);
ads.getAddr_ADS1100(ADS1100_DEFAULT_ADDRESS);// 0x48, 1001 000 (ADDR = GND)
ads.setGain(GAIN_ONE);          // 1x gain(default)
ads.setMode(MODE_CONTIN);       // Continuous conversion mode (default)
ads.setRate(RATE_8);            // 8SPS (default)
ads.setOSMode(OSMODE_SINGLE);   // Set to start a single-conversion
ads.begin();

// read data
address = ads.ads_i2cAddress;
Wire.beginTransmission(address);
Wire.endTransmission();
ads.Measure_Differential();

2. UIFlow

If you want the complete code, please click here.

 

More information

Schematic

PinMap

M5Core ( GROVE A ) GPIO22 GPIO21 5V GND
ADC Unit SCL SDA 5V GND

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ADC Unit Analog-to-Digital Converter

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ADC Unit Analog-to-Digital Converter

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