ADC I2C Unit (ADS1100)

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

• Datasheet - ADS1100

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