HX712 Datasheet | AVIA Semiconductor

24-Bit Analog-to-Digital Converter (ADC) with Load-cell Power Supply Switch and Battery Voltage Detection for Weigh Scales DESCRIPTION Based on Avia Semiconductor’s patented technology, HX712 is a precision 24-bit analogto-digital converter (ADC) with on chip load-cell power supply switch and battery voltage detection. It’s 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 ±20m V or ±10m V respectively, when a 5V reference voltage is connected between REFP and REFN pins. Singleended battery detection input pin BAT can be connected directly to battery output. On chip load-cell power switch can be used to turn off power supply to load-cell to save system power. Clock input is flexible. It can be from an external clock source, a crystal, or the on-chip oscillator that does not require any external ponent. On-chip power-on-reset circuitry simplifies digital interface initialization. There is no programming needed for the internal registers. All controls to the HX712 are through the 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 ponent 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 < 1.0m A, power down < 1u A - Operation supply voltage range: 2.6 ~ 5.5V - Operation temperature range: -40 ~ +85℃ - 14 pin SOP-14 package APPLICATIONS - Weigh Scales - Industrial Process Control 0.1u Load-cell 0.1u R3...