The I2C address bits are selectable using the on-board jumpers. The MCP3424 supports up to 8 different I2C addresses so with two A/D converters on each Delta-Sigma Pi you can stack up to 4 Delta-Sigma Pi boards on a single Raspberry Pi giving you 32 ADC inputs.
The MCP3424 contains an on-board 2.048V reference voltage with an input range of ±2.048V differentially (full scale range of 4.096V/PGA). A programmable Gain Amplifier gives the user a selectable gain of x1, x2, x4 or x8 before the analogue to digital conversion takes place.
The data rate for analogue to digital conversions is 3.75 (18 bit), 15 (16 bit), 60 (14 bit) or 240 (12 bit) samples per second. Data rate and resolution can be configured within software using the I2C interface.
Delta Sigma Pi V2.0 Address Configuration and Specification
Input Ratings & Specifications
Maximum voltage on ADC inputs: ± 2.048V
Maximum current on i2c port: 100mA.
Click to download schematic PDF.
Click image to enlarge
We have Arduino, C, Windows 10 IOT, Python 2 and Python 3 libraries available for this expansion board. You can download all of the libraries from github at:
Download the Arduino libraries from: https://github.com/abelectronicsuk/ABElectronics_Arduino_Libraries
To download the C libraries to your Raspberry Pi type in terminal:
git clone https://github.com/abelectronicsuk/ABElectronics_C_Libraries.git
To download the Python 2 libraries to your Raspberry Pi type in terminal:
git clone https://github.com/abelectronicsuk/ABElectronics_Python_Libraries.git
To download the Python 3 libraries to your Raspberry Pi type in terminal:
git clone https://github.com/abelectronicsuk/ABElectronics_Python3_Libraries.git
Download the Windows 10 IOT libraries from: https://github.com/abelectronicsuk/ABElectronics_Win10IOT_Libraries/
The datasheet for the Deta Sigma Pi version 1 can be downloaded here
This development board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by abelectronics.co.uk to be a finished end-product fit for general consumer use. As such, the goods being provided are not intended to be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety and environmental measures typically found in end products that incorporate such semiconductor components or circuit boards. Persons handling the product(s) must have electronics training and observe good engineering practice standards. This development board/kit does not fall within the scope of the European Union directives regarding electromagnetic compatibility, restricted substances (RoHS), recycling (WEEE), FCC, CE or UL, and therefore may not meet the technical requirements of these directives or other related directives.