Description: ADS1115 16-Bit ADC-4 Channel with Programmable Gain Amplifier
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 chip’s fairly small so it comes on a breakout board with ferrit’s 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 ADS1115’s 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) and Arduino (in our ADS1X15 Arduino library repository) Simply connect GND to ground, VDD to your logic power supply, and SCL/SDA to your micro controller’s I2C port and run the example code to start reading data.
- ADS1115 Breakout
- Resolution: 16 Bit
- Number of Channels: 4
- Programmable Gain
- Amplifier built-in
- Operating Voltage: 2V to 5.5V DC
- Continuous Current Consumption: 150μA
- Auto Shut-Down feature
- Programmable data rate via an I2C serial
- four 8SPS to 860SPS I2C slave addresses can be chosen if using multiple ADS1115 boards on a single bus.
- Can perform conversions at rates up to 860 samples per second
- Input ranges as low as ± 256mV, allowing both large and small signals to be measured with high resolution
- Input multiplexer provides two differential or four single-ended inputs
- Continuous conversion mode or a single-shot mode which automatically powers down after a conversion and greatly reduces current consumption during idle time
- Operating Temperature: -40C to +125C
- 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.
Uses for the 16-Bit 4-Channel ADC ADS1115 with Programmable Gain Amplifier:
- This converter will of course prove useful to all those not possessing a microcontroller with an analogue-to-digital converter. It can also be added to a pre-existing CAN for taking more precise measurements of small and large signals.
- Such a device can be used to create a temperature measuring tool, an automation or process control system, or even a battery level indicator. Its tiny size means it can be used in extremely compact portable projects.
- 1 x ADS1115 16-Bit ADC-4 Channel With Programmable Gain Amplifier