ADS1115 ADC 4 Channel, 16 bit , I2C PGA

Suits Raspberry Pi & Arduino

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This ADC will open up the analogue world to your Raspberry Pi or Arduino.
For microcontrollers without an analog-to-digital converter or when you want a higher-precision ADC, the ADS1115 
provides 16-bit precision at 3300 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 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 ADS1115's connected on a single 2-wire I2C bus for 16 single ended inputs.
You can find the datasheet here
To get you started, here is example code for both the Raspberry Pi (in the Pi Python library) and Arduino (in the 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.
  • WIDE SUPPLY RANGE: 2.0V to 5.5V
  • LOW CURRENT CONSUMPTION: Continuous Mode: Only 150µA Single-Shot Mode: Auto Shut-Down
  • I2C INTERFACE: Pin-Selectable Addresses
  • This board/chip uses I2C 7-bit addresses between 0x48-0x4B, selectable with jumpers.
23 • ULTRA-SMALL QFN PACKAGE: The ADS1113, ADS1114, and ADS1115 are
2mm × 1,5mm × 0,4mm precision analog-to-digital converters (ADCs) with 16
• WIDE SUPPLY RANGE: 2.0V to 5.5V bits of resolution offered in an ultra-small, leadless
• LOW CURRENT CONSUMPTION: QFN-10 package or an MSOP-10 package The ADS1113 / 4/5 are designed with precision, power, and.
Continuous Mode: Only 150μA ease of implementation in mind The ADS1113 / 4/5.
Single-Shot Mode:. Auto Shut-Down feature an onboard reference and oscillator Data are
• PROGRAMMABLE DATA RATE: transferred via an I2C-compatible serial interface; four
8SPS to 860SPS I2C slave addresses can be selected. The
• INTERNAL LOW-DRIFT ADS1113 / 4/5 operate from a single power supply
VOLTAGE REFERENCE ranging from 2.0V to 5.5V.
• INTERNAL OSCILLATOR The ADS1113 / 4/5 can perform conversions at rates
• INTERNAL PGA up to 860 samples per second (SPS). An onboard PGA is available on the ADS1114 and ADS1115 that
• I2C ™ INTERFACE: Pin-Selectable Addresses offers input ranges from the supply to as low as
• FOUR SINGLE-ENDED OR TWO ± 256mV, allowing both large and small signals to be
DIFFERENTIAL INPUTS (ADS1115) measured with high resolution. The ADS1115 also
features an input multiplexer (MUX) that provides two • PROGRAMMABLE COMPARATOR differential or four single-ended inputs.
(ADS1114 and ADS1115)
The ADS1113 / 4/5 operate either in continuous
APPLICATIONS conversion mode or a single-shot mode that
• PORTABLE INSTRUMENTATION automatically powers down after a conversion and greatly reduces current consumption during idle
• CONSUMER GOODS periods. The ADS1113 / 4/5 are specified from -40 ° C


SKU IF_415380B4
Brand Logicware

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