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For microcontrollers without an analog-to-digital converter or when you want an ADC system, the ads1115 provides 16-bit precision at 860 samples/second on I2 C. The chip can be configured as 4-channel single-ended differential input, or two channels. As a bonus from Nice, it even includes a programmable gain amplifier, up to x16, to help us boost the one size/differential signals to the entire range. We love this ADC, because it can operate from 2 to 5V power supply/logic, can measure a wide range of signals and it is super easy to use. It is a great general purpose 16-bit converter.
The chip is small enough so that it comes on a breakout board with ferrites to keep the avdd and agnd quiet. Interfacing is carried out via I2 C. The address can be changed to any of the four options (see table 5 datasheet) so you can have up to 4 ads1115 connected on a single two-wire I2C bus for 16 single ended inputs.
To get you started, we have for example code both Raspberry Pi (in our Adafruit pi Python library) and Arduino (in our ads1 x 15 Arduino library repository) Simply connect GND to the ground, the VDD power supply to your logic, and SCL/SDA to your microcontroller the I2 C port and run the sample code to start reading data.
D. Olson
Reviewed in the United States on June 1, 2022
Just got this today and wired it up with my UNO and it seems to work fine. I had some cheap ones from AliExpress but could not get the I2C to work. This one, no problem. The ADC's appear to work fine but I have not tried calibrating them yet.
inF1704
Reviewed in Germany on March 30, 2022
Das hier ist ein richtiger ADS1115 mit 16bit Auflösung und in sehr guter und gewohnter Adafruit Qualität. Leider gibt es auch hier auf Amazon sehr viele günstigere Varianten aber davon sind 90% keine 16bit Wandler sondern nur 12bit Wandler. Der digitale Messwerte springt dann immer um 16 Werte weiter bzw. der Messwert in HEX zeigt an der letzten Stelle immer eine 0.Dieser hier ist einwandfrei.
Rob Farr
Reviewed in the United Kingdom on January 29, 2017
Works perfectly with a Raspberry Pi 3 (not with a Pi version 1, however: I couldn't get the software to compile). The documentation on the Adafruit website is excellent: just cut and paste. With a few wires and a bread-board, I had a working analogue-to-digital setup so I could log data from a spectrophotometer. Very happy!
Customer
Reviewed in the United Kingdom on February 11, 2016
Good product.
Francesco Maita
Reviewed in Italy on July 16, 2015
Il prodotto arriva con una breakout veramente buona. Il dispositivo supporta il protocollo di comunicazione I2C ed ha già un suo indirizzo "grossolano" incluso, quindi se dovete usarne uno solo è questione di un attimo. Se ne dovete usare più di uno è possibile cambiare alcune parti dell'indirizzo, anche questo agendo su un pin specifico. E' facile da usare e sul sito Adafruit sono disponibili delle librerie veramente ben fatte. Personalmente (sono un utente tra il principiante ed il medio di Arduino) ci ho messo 10 minuti per preparare il software.
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