8-Channel ADC Rpi HAT For Analog-To-Digital Conversions

By on September 26, 2017
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Raspberry Pi enthusiasts may be interested in a new 8 channel ADC which has been specifically created for the Raspberry Pi which is capable of providing analog-to-digital conversions.

Created by Chris Burgess the 8-channel ADC for the Raspberry Pi is now available to purchase for $17 or £12.56 directly from the awesome Tindie website.

Chris designed the Raspberry Pi HAT due to the lack of anything currently available in the market when he was building a high powered robot that needed to be able to accurately measure voltages and take analog sensor readings.

Based on the MCP3008 ADC controller IC:

  • 16-pin DIP package.
  • 8-Channel
  •  200 ksps max. sampling rate at VDD = 5V
  •  10-Bits of resolution (when powered with 5V.)
  • Analog inputs programmable as single-ended or pseudo-differential pairs
  • On-chip sample and hold
  • SPI serial interface (modes 0,0 and 1,1)
  • Low power CMOS technology
  • 5 nA typical standby current, 2 µA max.
  • 500 µA max. active current at 5V
  • Industrial temp range: -40°C to +85°C
  • Adafruit Tutorial

Board Features:
8 ADC input Channels:

  • 4-channels configured with voltage divider to allow measuring voltage up to 14.5VDC.
  • 4-channels configured with zero-ohm jumpers to allow for direct-input for ADC measurements.
  • All channels can be reconfigured for zero-ohm jumpers, inline-resistors or in-line capacitors.
  • Channel 0-3 can also be reconfigured for pull-down resistors, or ground-referenced capacitors.
  • 3.3V, 5V, and GND connection terminals.
  • Board can back-power Raspberry Pi via 5V and GND connection terminals.
  • High-quality screw-terminals on all channels.
  • Hardware or Software SPI, selectable via jumpers.
  • SPI can use CEO of CE1, selectable via solder jumper.
  • Footprint for EEPROM and supporting passive components to allow you to turn into true rPI HAT (EEPROM and passives optional.)
  • Stackable header option.

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