{"product_id":"adafruit-nau7802-24-bit-adc-stemma-qt-qwiic","title":"Adafruit NAU7802 24-Bit ADC","description":"\u003cp\u003eIf you are feeling the stress and strain of \u003cspan style=\"text-decoration: line-through;\"\u003emodern life\u003c\/span\u003e a Wheatstone bridge and you want to quantify it, this handy breakout will do the job, no sweat!\u003c\/p\u003e\n\u003cp\u003eThe\u003cstrong\u003e\u003cspan\u003e \u003c\/span\u003eAdafruit NAU7802\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003econtains 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 a\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Wheatstone_bridge\"\u003eWheatstone bridge arrangement\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eEach 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.\u003c\/p\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eE-\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003epad connects to ground (often a black wire), the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eE+\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003epad 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).\u003c\/p\u003e\n\u003cp\u003eThen\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eA-\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eand\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eA+\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003epads connect to the differential outputs from the bridge. For example, connecting to a strain gauge these tend to be the white and green wires. There's also a secondary B+\/B- port if you need to measure a second bridge.\u003c\/p\u003e\n\u003cp\u003eAs 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 Adafruit's\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/github.com\/adafruit\/Adafruit_NAU7802\"\u003eArduino library\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003eor\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/github.com\/CedarGroveStudios\/CircuitPython_NAU7802\"\u003eCedarGrove's CircuitPython\/Python library\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003eto configure and read the ADC for fast interfacing. Note that this sensor has a fixed I2C address, \u003ca href=\"https:\/\/learn.adafruit.com\/working-with-multiple-i2c-devices\"\u003e\u003cspan\u003e \u003c\/span\u003eif multiple sensors are desired on one I2C bus, a multiplexer can be used\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eTechnical Details\u003c\/h2\u003e\n\u003cp\u003e\u003cb\u003eRevision History:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAs of June 23rd, 2025 –\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eBy popular demand! We've updated this design to expose the 'second' ADC input (B+ and B-), so we've updated this PCB to now come with a 6-pin terminal block port, instead of 4-pin.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAs of January 19, 2024 -\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eWe updated this breakout to have the terminal block pre-soldered - now its really plug and play!\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAs of October, 2022\u003c\/b\u003e\u003cspan\u003e \u003c\/span\u003e- this sensor breakout may come with black or tan STEMMA QT connectors - they work the same!\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eProduct Dimensions: 25.3mm x 23.0mm x 4.5mm \/ 1.0\" x 0.9\" x 0.2\"\u003c\/p\u003e\n\u003cp\u003eProduct Weight: 2.3g \/ 0.1oz\u003c\/p\u003e\n\u003cimg src=\"https:\/\/www.adafruit.com\/includes\/templates\/shop2019\/images\/RoHS2_2011_65_EU.svg\" alt=\"RoHS 2 2011 65 EU Compliant\" width=\"145\" height=\"80\"\u003e\n\u003cimg src=\"https:\/\/www.adafruit.com\/includes\/templates\/shop2019\/images\/RoHS2_2015_863_EU.svg\" alt=\"RoHS 2 2015 863 EU Compliant\" width=\"145\" height=\"80\"\u003e\n\u003ch2\u003eLearn\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/learn.adafruit.com\/adafruit-nau7802-24-bit-adc-stemma-qt-qwiic\"\u003ePrimary Guide: Adafruit NAU7802 24-Bit ADC - STEMMA QT \/ Qwiic\u003c\/a\u003e\u003cbr\u003eMeasure force over I2C\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/learn.adafruit.com\/products\/4538\/guides\" target=\"_blank\" rel=\"noopener\"\u003eSee All Guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Adafruit","offers":[{"title":"Default Title","offer_id":40046680047699,"sku":"ADA4538","price":5.95,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0174\/1800\/files\/4538-06.jpg?v=1782384198","url":"https:\/\/shop.pimoroni.com\/en-eu\/products\/adafruit-nau7802-24-bit-adc-stemma-qt-qwiic","provider":"Pimoroni Ltd","version":"1.0","type":"link"}