HX711 Weight Pressure Sensor Module

HX711 ( HX 711 ) Load Cell Amplifier Module uses 24 high-precision ADC converter chip hx711, is designed for high-precision electronic scale and design, with two analog input channels. The input multiplexer selects either Channel A or B differential input to the low-noise programmable gain amplifier (PGA). Channel A can be programmed with a gain of 128 or 64, corresponding to a full-scale differential input voltage of ±20mV or ±40mV respectively, when a 5V supply is connected to AVDD analogue power supply pin. Channel B has a fixed gain of 32. .The input circuit can be configured to provide a bridge voltage electrical bridge (such as pressure, weight) sensor model is an ideal high-precision, low-cost sampling front-end module.There is no programming needed for the internal registers. All controls to the HX711 are through the pins.

Specifications:

• 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 oscillator requiring no external component with optional external crystal
• On-chip power-on reset
• Simple digital control and serial interface: pin-driven controls, no programming needed
• Simultaneous 50 and 60Hz supply rejection
• Current consumption including on-chip analog power supply regulator: normal operation < 1.5mA, power down < 1uA
• Operation supply voltage range: 2.6V ~ 5.5V
• Operation temperature range: -40 ~ +85C