The HX711 is a 24-bit A/D converter chip for electronic precision scales. Compared to other chips of the same type, this chip incorporates the necessary peripheral equipment for other chips of the same type, such as: B. Regulated power supply and on-chip clock oscillator. It reduces the overall cost of the electronic balance and improves the overall performance and reliability of the machine. The interface and programming between the chip and the backend MCU chip is very simple, all control signals are controlled by pins, there is no need to program the registers on the chip. The input selector can be connected to an internal programmable low-noise amplifier by selecting channel A or channel B. The programmable gain for channel a is 128 or 64. The amplitudes of the corresponding differential input signals over the full range are ±20MV and ±40MV, respectively. Channel B with a fixed gain of 32 is used to identify system parameters. The on-chip stable power supply can directly power external sensors and on-chip A/D converters. No additional analog power supply is required on the motherboard. The on-chip clock oscillator requires no external components. The auto power-on reset feature simplifies the power-on initialization process. Reliable on-chip power supplies include external sensors and on-chip A/D converters. D-Converter can be powered directly.