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Adafruit 12-Bit ADC 4 Channel with Programmable Gain Amplifier

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Quoting product code: A77QN

£9.99

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About this product

Overview

  • 12-bit precision at 3300 samples/second over I2C
  • Can be configured as 4 single-ended input channels, or two differential channels
  • Includes a programmable gain amplifier

Product overview

• 12-bit precision at 3300 samples/second over I2C• Can be configured as 4 single-ended input channels, or two differential channels• Includes a programmable gain amplifier
• Small chip so it comes on a breakout board with ferrites to keep the AVDD and AGND quiet
Please click here for the Raspberry Pi Library
Please click here for the Arduino Library

For microcontrollers without an analogue-to-digital converter or when you want a higher-precision ADC, the ADS1015 provides 12-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 12 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 ADS1015's connected on a single 2-wire I2C bus for 16 single ended inputs.

Specification

WIDE SUPPLY RANGE: 2.0V to 5.5V
LOW CURRENT CONSUMPTION: Continuous Mode: Only 150µA Single-Shot Mode: Auto Shut-Down
PROGRAMMABLE DATA RATE: 128SPS to 3.3kSPS
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.

Does the 3300 samples per second apply to each channel independently or is it a total shared between the 4 channels?

Asked by: Tony
Full details can be found at the link below https://www.adafruit.com/products/1083
Answered by: Dominic
Date published: 2016-01-26

What are the outputs on the Adafruit 12-Bit adc? Could I use it for input to an Apple Mac for analogue input from keyboards, vocals and other instruments? Mike. 

Asked by: Squirrel
This information is presented in the user guide for the device, which can be found on the downloads tab of the product listing. I have also copied in a link to the electronic version of the instructions below for your convenience. https://maplindownloads.s3-eu-west-1.amazonaws.com/A77QNDatasheet-2168.pdf The datasheet for this item is very detailed and includes schematics, operational parameters and pinouts, however it is important to note we are unable to offer any advice as to usage or design of any project/design you may wish to undertake.
Answered by: Les
Date published: 2015-12-09
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