Description:
This module uses 24 high precision A/D converter chip hx711. It is a specially designed for the high precision electronic scale designwith two analog input channelthe internal integration of 128 times the programmable gain amplifier. The input circuit can be configured to provide a bridge type pressure bridge (such as pressureweighing sensor mode)is of high precisionlow cost is an ideal sampling front-end module.

Features:
Two selectable differential input channels
On-chip active low noise PGA with selectable gain of 3264 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 controlsno programming needed
Simultaneous 50 and 60Hz supply rejection
Current consumption including on-chip analog power supply regulator: normal operation Operation supply voltage range: 2.6 ~ 5.5V
Operating Temperature Range:-20 degree ~ +85 degree

Cautions
1. All digital input pins, including RATE, XI and PD_SCK pins, do not have built-in pull-high or pull-low resistors on the chip. These pins should not be left dangling when in use.
2. It is recommended to use channel A connected to the sensor as a small signal input channel; channel B is used for system parameter detection, such as battery voltage detection.
3. It is recommended to use PNP tube S8550 with on-chip voltage regulator power supply circuit. Other MOS or bipolar transistors can also be used as needed, but attention should be paid to the stability of the regulated power supply.
4. Whether using the on-chip regulated power supply or other power supply on the system, it is recommended that the sensor and the A/D converter to use the same analog power supply.
5. The number of input clock pulses should not be le