Strain Beam Module - with 24-bit ADC NAU7802 - STEMMA QT / Qwiic - Adafruit 4538

The Adafruit module is equipped with the NAU7802 chip, which enables reading data from strain gauge beams . Includes ultra high resolution 24 bit differential ADC with additional gain and calibration circuits. After connecting the module to the microcontroller board, you can read the change in beam resistance , and after calibration, you can accurately measure the balance. The board has been equipped with Qwiic connectors, fields for soldering screw joints and outputs in the form of solder pads to the doldpin strip.

Kit contents.

• Purpose: module for strain gauge beams
• Built-in chip: NAU7802
• Board supply voltage: from 3 V to 5 V DC
• ADC converter: two-channel, 24-bit
• Built-in calibration circuits
• Built-in VDDA regulator for internal analog circuit or external load cell
• RMS Noise:
  • 50 nV with 10 SPS data output rate and PGA 128 gain
  • 150 nV with 80 SPS data output rate and 128 PGA gain
• Programmable PGA gain: 1 to 128
• Programmable ADC output range
• The range of the external reference voltage of the difference is 0.1V to 5V
• Low power consumption and programmable power management options: up to 1 uA idle
• Leads: 2x Qwiic connector / solder pads
• Tile sizes: 25.3 x 23 x 4.5 mm
• Weight: 2.3 g

• Module for strain gauge beams - with 24-bit ADC converter NAU7802 - STEMMA QT / Qwiic - 1 piece
• 1x6 goldpin strip - 2.54 mm raster - 1 piece
• 1x2 pin screw connector - 2 pieces

• The website of the manufacturer: Adafruit 4538
• User Guide
• Technical documentation of the system NAU7802
• EagleCAD files
• Layout diagram