Typically the digital output is a two's complement binary number that is proportional to the input, but there are other possibilities. An ADC may also provide an isolated measurement such as an electronic device that converts an analog input voltage or current to a digital number representing the magnitude of the voltage or current. *To get you started, we have example code for both the Raspberry Pi (in our Adafruit Pi Python library) and Arduino (in our ADS1X15 Arduino library repository) Simply connect GND to ground, VDD to your logic power supply, and SCL/SDA to your microcontroller’s I2C port and run the example code to start reading data.In electronics, an analog-to-digital converter ( ADC, A/D, or A-to-D) is a system that converts an analog signal, such as a sound picked up by a microphone or light entering a digital camera, into a digital signal. The address can be changed to one of four options (see the datasheet table 5) so you can have up to 4 ADS1115’s connected on a single 2-wire I2C bus for 16 single ended inputs.

*The chip’s fairly small so it comes on a breakout board with ferrites to keep the AVDD and AGND quiet. It is a great general purpose 16 bit converter. 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.

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. The chip can be configured as 4 single-ended input channels, or two differential channels. CJMCU-ADS1115 16 Bit Precision Analog-to-Digital Converter ADC Module Development Boardįor 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.

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