HX711 module 24-bit precision AD module pressure sensor
Description：
This product is a 24-bit A/D converter chip specially designed for high-precision electronic scales. Compared with other chips of the same type, this chip integrates the peripheral circuits required by other chips of the same type including regulated power supply, on-chip clock oscillator, etc. It has the advantages of high integration, fast response speed, and strong anti-interference. Reduce the overall cost of the electronic scale, improve the performance and
reliability. The interface and programming between the chip and the back-end MCU chip are very simple, all control signals are driven by pins, and there is no need to program the internal registers of the chip. The input selection switch can select channel A or channel B arbitrarily, which is connected to its internal low-noise programmable amplifier. The programmable gain of channel A is 128 or 64, and the corresponding full-scale differential input signal amplitude is ±20mV or ±40mV, respectively. Channel B is a fixed gain of 32, which is used for system parameter detection. The regulated power supply provided in the chip can directly provide power to external sensors and the A/D converter in the chip, and no additional analog power supply is required on the system board. The clock oscillator in the chip does not require any external devices. The power-on automatic reset function simplifies the initialization process of power-on.
Product parameter：
Power consumption (including regulated power supply circuit) Typical working current: <1.7mA Power-off current: <1μA
Operating voltage range: 2.6 ~ 5.5V
Operating temperature range: -20 ~ + 85℃
16 pins: SOP-16 package
Instructions for use:
1. On-chip low-noise programmable amplifier with selectable gains of 64 and 128
2: The on-chip voltage regulator circuit can directly provide power to external sensors and the on-chip A/D converter.
3: The on-chip clock oscillator does not require any external devices, and an external crystal or clock can also be used when needed.
4: Power-on automatic reset circuit.
5: Simple digital control and serial communication, all controls are input by pins. No programming is required for the on-chip registers.
6: The output data rate of 10Hz or 80Hz can be selected.
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HX711 module 24-bit precision AD module pressure sensor
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