The Analog-to-Digital converters ADS1115 are connected to the I2C bus of the Raspberry PI. The ADC is fed from 3.3V, the clock is driven by the I2C-Master (Raspberry) with 2MHz. It is as simple as 4 wires only

  • +3.3V
  • GND (ground, 0V)
  • SCL (serial clock, driven by the I2C-Master)
  • SDA (serial data, bidirectional)

The pull-up resistory (pullups) are internally enabled, so there is no need for external components.

raspberry pi gpio pinout note: 30.11.2015: Be careful! The pinout in the drawing is flipped vertically compared to the photo of the Raspberry.

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