Description
The HX712 is a precision 24-bit analogto-digital converter (ADC) with on chip load-cell power supply switch and battery voltage detection. It is designed for weigh scales and industrial control applications to interface directly with a bridge sensor. The differential inputs connect to the lownoise programmable gain amplifier (PGA) with a gain of 128 or 256, corresponding to a full-scale differential input voltage of +-20mV or +-10mV respectively, when a 5V reference voltage is connected between REFP and REFN pins.
Features
- Selectable differential input or battery detection input
- On-chip low noise PGA with selectable gain of 128 and 256
- On-chip MOS power switch for turning off loadcell power supply in system power save mode
- 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
- Selectable 10SPS or 40SPS output data rate
- Simultaneous 50 and 60Hz supply rejection
- Current consumption: normal operation < 1.0mA, power down < 1uA
- Operation supply voltage range: 2.6 ~ 5.5V
- Operation temperature range: -40 ~ +85C
- 14 pin SOP-14 package
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