Gravity 16Bit 4-Channel ADC Analog Digital Converter I2C ADS1115

The DFRobot Gravity ADC module measures four analog signals with the 16-bit ADS1115 converter and passes the values on via I2C. This lets a Raspberry Pi, which has no analog inputs of its own, read analog Gravity sensors; the module also suits Arduino and ESP32. The chip has an accurate reference voltage and a programmable gain amplifier (PGA), so weak signals can be captured as well. With the address switch two modules run on the same bus, giving eight channels.

For signals up to 10 V: Gravity 2-Channel 15Bit 0-10V ADC Module

Caution: The voltage on the analog inputs must be lower than VCC + 0.3 V.

Features:

• 4 analog inputs A0 to A3 as colour-coded 3-pin headers for Gravity analog sensors
• 16-bit resolution, programmable gain amplifier (PGA)
• I2C address via switch: 0x48 or 0x49, two modules on the same bus
• I2C level 3.3 V, suitable for Raspberry Pi and ESP32
• Supply 3.3 V to 5 V
• Gravity I2C 4-pin connector: VCC, GND, SCL, SDA

Application Examples:

• Analog sensors on the Raspberry Pi
• Accurate measurement of weak signals, for example pH or gas sensors
• Voltage measurement in data loggers

Documentation:

• Wiki DFRobot DFR0553 with examples for Arduino and Raspberry Pi
• DFRobot_ADS1115 library (GitHub)
• Schematic (PDF)
• Datasheet (PDF)

Technical Data:

• Manufacturer: DFRobot
• Manufacturer SKU: DFR0553
• Chip: ADS1115
• Operating voltage: 3.3 V to 5 V
• Measuring range: 0 V to VCC
• Analog channels: 4
• Resolution: 16 bit
• Operating current: 2 to 3 mA without sensors
• Interface: I2C, 3.3 V level
• I2C address: 0x48 or 0x49
• Dimensions: 32 × 32 × 11.5 mm
• Weight: 15 g

Scope of Delivery:

• 1× Gravity 16Bit 4-Channel ADC Analog Digital Converter I2C ADS1115
• 1× Gravity I2C cable 4-pin
• 1× XH2.54 pin header 4-pin