HX711 24 Bit Analog to Digital Converter Load Cell

HX711 IC 24 Bit Analog to Digital Converter (ADC) for Weigh Scales

HX711 IC is an ADC chip with preamplifier included. The chip is specifically designed for weight scales applications. The load cells which usually measure weight provide voltage outputs in millivolts. These outputs are difficult to handle directly by controllers, so we can use HX711 IC which takes these voltage signals and provide standard digital values which can be used by a microcontroller. The chip has integrated preamplifier specifically to handle these low voltages.

Onchip power supply regulator eliminates the need for an external supply regulator to provide analog power for the ADC and the sensor. Clock input is flexible. It can be from an external clock source, a crystal, or the on-chip oscillator that does not require any external component. On-chip power on-reset circuitry simplifies digital interface initialization.

There is no programming needed for the internal registers. All controls to the HX711 are through the pins.

We have various types of Load Cells, Force Sensor, Flex Sensor and Pressure Sensor. Check our complete collection of Weigh Sensor and Load cell.

Where to use HX711?

To measure weight using load cell we usually need-regulated power source, output amplifier (noise reduced), ADC converter. All three features need three separate circuits and components adding to cost and complexity.  So we can use HX711 IC which has all the above features simply removing complex circuitry.

Features and Specifications of HX711 Load Cell IC

• 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 andADC analog power supply
• On-chip oscillator requiring no externalcomponent with optional external crystal
• On-chip power-on-reset
• Simple digital control and serial interface: pin-driven controls, no programming needed
• Selectable 10SPS or 80SPS output data rate
• Simultaneous 50 and 60Hz supply rejection
• Current consumption : normal operation < 1.5mA, power down < 1uA
• Operation supply voltage range : 2.6 Volts to 5.5 Volts
• Operation temperature range : -40℃ to +85℃

Applications of HX711 24 Bit ADC IC

• Weight scales
• Industrial process control
• Automatic Doors
• Smart elevators

Related Links

• HX711 IC Datasheet
• Basics of HX711 24-Bit Analog-to-Digital Converter (ADC) for Weigh Scales
  
• 10 Things you can do with HX711 and Loadcell