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

• On-chip power-on-reset

• 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 '+'