ADS1115 16 Bit I2C Module ADC 4 channel
ADS1115 16 Bit I2C Module ADC 4 channel
For microcontrollers without an analog-to-digital converter or when you want a higher-precision ADC the ADS1115 provides 16-bit precision at 860 samples/second over I2C. The chip can be configured as 4 single-ended input channels or two differential channels. As a nice bonus it even includes a programmable gain amplifier up to x16 to help boost up smaller single/differential signals to the full range. We like this ADC because it can run from 2V to 5V power/logic can measure a large range of signals and its super easy to use. It is a great general purpose 16 bit converter.
The chips fairly small so it comes on a breakout board with ferrites to keep the AVDD and AGND quiet. Interfacing is done via I2C. The address can be changed to one of four options (see the datasheet table 5) so you can have up to 4 ADS1115s connected on a single 2-wire I2C bus for 16 single ended inputs.
To get you started we have example code for both the Raspberry Pi (in our Adafruit Pi Python library) (in our ADS1X15 library repository) Simply connect GND to ground VDD to your logic power supply and SCL/SDA to your microcontrollers I2C port and run the example code to start reading data.
TECHNICAL DETAILS
WIDE SUPPLY RANGE: 2.0V to 5.5V
LOW CURRENT CONSUMPTION: Continuous Mode: Only 150µA Single-Shot Mode: Auto Shut-Down
PROGRAMMABLE DATA RATE: 8SPS to 860SPS
INTERNAL LOW-DRIFT VOLTAGE REFERENCE
INTERNAL OSCILLATOR
INTERNAL PGA
I2C INTERFACE: Pin-Selectable Addresses
FOUR SINGLE-ENDED OR TWO DIFFERENTIAL INPUTS
PROGRAMMABLE COMPARATOR
This board/chip uses I2C 7-bit addresses between 0x48-0x4B selectable with jumpers.
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