ADS1115 16-Bit I2C Analog-to-Digital Converter ADC 4-Channel with Programmable Gain Amplifier

Description

ADS1115 16 Bit I2C Analog to Digital Converter ADC 4 Channels with Programmable Gain Amplifier

• DESCRIPTION

  For microcontrollers without an analog-to-digital converter or when a higher precision ADC is desired, the ADS1115 offers 16-bit precision at 860 samples/second via I2C. Single-ended or two differential input channels.

Tutorial: How to use ADS1115

The ADS1115 is a 16-bit analog-to-digital converter ideal for applications requiring high precision. Useful for beginners and intermediates.

What you need

• Arduino or Raspberry Pi
• I2C Cable
• Pull-up Resistor
• Analog Sensors

Steps

1. 1. Install the Adafruit ADS1X15 library in your Arduino IDE.
2. 2. Connect VCC to 3.3V or 5V, GND to GND, SDA and SCL to I2C pins.
3. 3. Add a pull-up resistor (2.2kΩ) between SDA and GND, between SCL and GND.
4. 4. Initialize the ADS1115 with the desired configuration.
5. 5. Read values from a specific channel.
6. 6. Configure the programmable gain to improve sensitivity.
7. 7. Use single-ended or differential channels.
8. 8. Test the connection and data reading.

Example code

```cpp
#include <Adafruit_ADS1X15.h>

Adafruit_ADS1X15 ads = Adafruit_ADS1X15(0x48);

void setup() {
  ads.begin();
}

void loop() {
  int16_t value = ads.readADC_Differential_0_1();
  Serial.println(value);
}
```

Mini project

Measure the voltage of a pressure sensor with a differential channel in 30 minutes.

Common mistakes

• Forget to configure the I2C pins correctly.
• Do not use pull-up resistors.
• Set the gain too high.
• Incorrectly connect the pins.

Recommended accessories

• Pressure sensors
• Temperature sensors
• Pull-up resistor (2.2kΩ)
• I2C cable

Frequently asked questions

How to configure the gain?
Check the datasheet for correct values.

Can I use ADS1115 with Raspberry Pi?
Yes, use the Raspberry Pi library.

How long does it take for ADS1115 to read data?
860 samples per second.