OVERVIEW
The MCP3421 Weight Scale Demo Board works with the LabVIEW™ Graphical User Interface (GUI) PC Software. This demo board demonstrates how to use the MCP3421 18-bit Delta-Sigma ADC for weight scale applications. It uses the PIC18F4550 microcontroller for data processing and USB communication with PC. This board also demonstrates the changes in the system performance by adjusting the parameters of the sensor signal conditioning circuits using the MCP6V07 auto-zeroed op amp.

FEATURE Highlights
• The LCD displays the user’s selected option and the ADC output code or the calculated results.
• The user can select the signal averaging factor (1 or 4) by pressing the S3 button.
   The selected option is displayed on the LCD.
• System performance analysis using PC GUI: the interface allows various interactive post signal processing, such as standard deviations and histogram.
• Hardware PCB design examples: this demo board utilizes a robust grounding method of analog circuits in PCB design. It also demonstrates how to split analog and digital ground planes.
• Signal conditioning examples using MCP6V07: the low-noise op amp is used to boost input signal levels.
• 2 Kg load cell with 1 mV/V sensitivity.