8 Channel 18-bit Analog to Digital Differential Converter for Raspberry Pi

AB Electronics UKSKU: RB-Abu-02
Manufacturer #: ADCDIFFPI

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Sale price £17.56

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In stock, 3 units

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  • 8 x 18-bit differential inputs
  • Control via the Raspberry Pi I2C port
  • Stack up to 4 ADC Differential Pi boards on a single Raspberry Pi
  • Jumper selectable I2C addresses
  • Buffered 5V I2C port

The 8 Channel 18-bit Analog to Digital Converter for Raspberry Pi is an 8 channel 18 bit analog to digital converter designed to work with the Raspberry Pi. The ADC Differential Pi is based on two Microchip MCP3424 A/D converters each containing 4 analog inputs.  The MCP3424 is a delta-sigma A/D converter with low noise differential inputs.

8 Channel 18-bit Analog to Digital Differential Converter for Raspberry Pi

The ADC Differential Pi is powered through the host Raspberry Pi using the GPIO port and extended pins on the GPIO connector allow you to stack the ADC Differential Pi along with other expansion boards.

8 Channel 18-bit Analog to Digital Differential Converter for Raspberry Pi

8 Channel 18-bit Analog to Digital Differential Converter for Raspberry Pi

  • Vdd (5V pin on I2C bus): 5.0V
  • All AD inputs and outputs: VSS–0.4V to VDD+0.4 V
  • Current at Input Pins: ±2 mA
  • I2C SDA/SCL voltage: 5.0 V
  • I2C port current: 100 mA
  • Based on the MCP3424 from Microchip Technologies Inc
  • Input range of ±2.048V
  • On-board 2.048V reference voltage (Accuracy  ± 0.05%, Drift: 15 ppm/°C)
  • On-Board Programmable Gain Amplifier (PGA): Gains of 1, 2, 4 or 8

Programmable Data Rate Options:

  • 3.75 SPS (18 bits)
  • 15 SPS (16 bits)
  • 60 SPS (14 bits)
  • 240 SPS (12 bits)

Customer Reviews

Based on 3 reviews
M.J. Waterloo
Versatile and easy to set up ADC

I needed to measure six different vacuum pressures using 26PC SMT Series Pressure Sensors from Honeywell. As the sesnor outputs are low at 50 mV over the full range of 0-1000 hPa pressure (with 5 V power source), I needed a multi-channel high-resolution ADC to get accurate measurement. With a maximum ADC input of about 5 V, a 12 bits ADC would give me a resolution of about 24 hPa, which was not sufficiently precise. I therefore selected the 18 bits ADC that would give me a measurement resolution of 0.02 mV or 0.4 hPa. I received the package and it included the ADC PCB and the 40-pin connector to Raspberry Pi. The connector has to be soldered on the PCB by yourself, which may be difficult if you do not have the right tools and/or experience. I connected the ADC to the Raspberry Pi and downloaded the scripts from the ABElectronics Github repository. I tested both Python and C-scripts and received measurements from the sensors. Scripts are easily adapted to your needs. The ADC met my expectations and I am very satisfied with this product.

It's cute & easy to use!

I looked through this kind of the hat for raspberry pi for measuring the sensor signal. It's cute and easy to handle in programming, too. It's really fitting to my purpose.

great board good driver support for PI

I've ordered 6 of these so far, I've tried several due to my own wiring issues but they work great - I use them with piezo sensors to pick up vibrations.

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