NAU7802 24-Bit ADC – STEMMA QT / Qwiic

If you are feeling the stress and strain ofmodern lifea Wheatstone bridge and you want to quantify it, this handy breakout will do the job, no sweat! TheAdafruit NAU7802contains a super-high-resolution 24-Bit differential ADC with extra gain and calibration circuitry that makes it perfect for measuring strain gauges / load cells or other sensors that have four wires that are connected in aWheatstone bridge arrangement.Each breakout comes with a NAU7802 ADC chip, plus some support circuitry, and 4 terminal blocks that can be used to connect a 4-wire sensor.TheE-pad connects to ground (often a black wire), theE+pad connects to a generated voltage from the NAU7802 that can be configured from 2.4V to 4.0V for a solid positive reference (often a red wire).ThenA-andA+pads connect to the differential outputs from the bridge. For example, connecting to a strain gauge these tend to be the white and green wires.As the sensor is twisted and bent, the slight changes in resistance are converted to minuscule voltage changes that can be read by the NAU ADC for converting into force or mass measurements. You can use ourArduino libraryorCedarGrove’s CircuitPython/Python libraryto configure and read the ADC for fast interfacing. Note that this sensor has a fixed I2C address,if multiple sensors are desired on one I2C bus, a multiplexer can be used.SpecificationsOperating Voltage: 3.3V (NAU7802: 2.7V-5.5V)24-bit Dual-Channel Analog to Digital ConverterProgrammable Gain AmplifierOn-chip temperature sensorSimultaneous 50Hz and 60Hz rejectionProgrammable PGA gains from 1 to 128Programmable aDC data output ratesExternal differential reference voltage range from 0.1V to 5VLow Power Consumption and Programmable Power Management Options<1uA standby current2x Qwiic ConnectorsProduct Dimensions: 25.3mm x 23.0mm x 4.5mm / 1.0" x 0.9" x 0.2"Product Weight: 2.3g / 0.1ozDocuments:Datasheet(NAU7802)