Overview
HX711 is a precision 24-bit analogto-digital converter (ADC) designed for weigh scales and industrial control applications to interface directly with a bridge sensor.
Features
- Two selectable differential input channels
- On-chip active low noise PGA with selectable gain of 32, 64 and 128
- On-chip power supply regulator for load-cell and ADC analog power supply
- Selectable 10SPS or 80SPS output data rate
- Simultaneous 50 and 60Hz supply rejection
- Operation supply voltage range: 4.8 ~ 5.5VDC
- Operation temperature range: -40 ~ +85°C
- Current consumption < 1.5mA
- Dimension: 36mmcm x 21mm x 5mm
Pin Definition - To MCU
- Pin 'GND' : Connect to MCU GND
- Pin 'DT' : Serial Data Output
- Pin 'SCK' : Serial Clock Input
- Pin 'VCC' : Connect to MCU VCC within 4.8 ~ 5.5VDC
Pin Definition - To Load Cell
- Pin 'E+' : Connect to Load Cell's Excitation '+'
- Pin 'E-' : Connect to Load Cell's Excitation '-'
- Pin 'A-' : Connect to Load Cell's Signal '-'
- Pin 'A+' : Connect to Load Cell's Signal '+'