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Analog to Digital Converter

Requirements

  • Two input channels
  • At least 10-bit measurement resolution
  • I2C data interface
  • Ideally at least 7 channels

Potential Selections

Product NamePrice

Number of Selectable Addresses 

Measurement ResolutionSupply VoltageDigiKey
MCP3426-28$4.24816-Bit3.3v / 5vLink
LTC2301/05$6.43912-Bit5vLink

Isolator

Requirements

  • Isolate at least 300 volts (Given solar panels output 151.2 volts and a safety factor of 2)

Potential Selections

Product NamePriceMaximum I2C Clock RateSafety SpecificationDigiKey
SI8602AC-B-IS$4.271.7 MHzUp to 5000 VRMS for 1 minuteLink

I2C Bus Buffer

Requirements

  • Isolate the transmission wire capacitance
  • Two channels (bidirectional for SDA and unidirectional for SCL)

Potential Selections

Product NamePriceMaximum I2C Clock RateDigiKey
P82B96TD$4.16400kHzLink

DC-DC Converter

Requirements

  • Step down to 5v

Potential Selections

Product NamePriceInput Voltage (Min)Input Voltage (Max)Output VoltageDigiKey
Recom Power R-78W5.0-0.5$12.016.5V32V5vLink
Seeed Technology 313080006$11.648V35V5vLink


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