Description

ADS1110 High Precision A/D Converter, 16-Bit, I2C, Low Power

The ADS1110 is a precision, continuously self−calibrating Analog-to-Digital (A/D) converter with differential inputs and up to 16 bits of resolution. The onboard 2.048V reference provides an input range of ±2.048V differentially. The ADS1110 uses an I2C-compatible serial interface and operates from a single power supply ranging from 2.7V to 5.5V. The ADS1110 can perform conversions at rates of 15, 30, 60, or 240 samples per second. The onboard programmable gain amplifier (PGA), which offers gains of up to 8, allows smaller signals to be measured with high resolution. In single-conversion mode, the ADS1110 automatically powers down after a conversion, greatly reducing current consumption during idle periods. The ADS1110 is designed for applications requiring high-resolution measurement, where space and power consumption are major considerations. Typical applications include portable instrumentation, industrial process control, and smart transmitters.

Quick Spec

Chipset : ADS1110, 16 Bit A/D Converter
Data Interface: I2C
Resolution: 16 Bits
Supply: 2.7-5.5V
Accuracy: 2.048V ±0.05%
Onboard Programmable Gain: x8
Data Rate: 15 - 240SPS (Samples Per Sec)
Drift: 5ppm/°C
Low Current Consumption: 240µA

Input Modes

The ADS1110 can operate in both differential and single-ended modes. In single-ended mode, the ADC measures the voltage between the analog input pin (AIN) and the ground (GND) reference. In differential mode, the ADC measures the voltage difference between two input pins (AIN+ and AIN-)

How to connect to Arduino

PIN 1 (Vin+) - Connect Vin+ to voltage source to be measured
PIN 2 (GND) - Connect GND to Arduino GND
PIN 3 (SCL) - Connect to Arduino PIN A4
PIN 4 (SDA) - Connect to the Arduino's PIN A5
PIN 5 (VCC) - Connect VCC to Arduino 5V output
PIN 6 (Vin-)- *

* Connect Vin- either to Arduino GND (for Single-Ended voltage readings ranging 0-2.048V) or to an external 2.048V reference source (for Single-Ended voltage readings ranging 0-4.096V) or to 'negative' input (for differential voltage readings between positive and 'negative' inputs).

Arduino Code Example

Arduino Code Example - Advanced Example

Here is an example Arduino program that sets up the ADS1110 to measure the voltage on AIN0 in single-ended mode using the default gain of 2/3 and the maximum data rate of 860 samples per second