The LHA7904 device is an I2C-compatible, 12-bit, high-precision, low-power analog-to-digital converter (ADC) in small DFN-10 and MSOP-10 packages. The LHA7904 device integrates a low-drift voltage reference and oscillator. The LHA7904 also includes a Programmable Gain Amplifier (PGA) and a digital comparator. These features, combined with a wide operating supply voltage range, make the LHA7904 ideal for power-constrained and space-constrained sensor measurement applications.
The LHA7904 can perform conversions at data rates up to 1000 samples per second (SPS). The PGA provides an input range from ±256mV to ±6.144V, enabling accurate small and large signal measurements. The LHA7904 has an input multiplexer (MUX) that enables two pairs of differential input measurements or four single-ended input measurements. Digital comparators are available in the LHA7904 for undervoltage and overvoltage detection.
LHA7904 can work in both continuous conversion mode and single-shot mode. In single-shot mode, these devices automatically power down after a single conversion; thus significantly reducing power consumption during idle periods.

Product Features

  • 宽电源电压:2.2V 至 5.5V
  • 低功耗:150μA(连续转换模式)                                          
  • 可编程数据传输速率:6.25SPS至1K SPS
  • 单周期稳定
  • 内部低漂移电压基准
  • 内部振荡器
  • I2C 接口:四个引脚可选地址
  • 四个单端输入或两个差分输入
  • 可编程比较器
  • 工作温度范围:-40°C 至 +125°C

Application Scenario

  • Portable meter
  • Battery Voltage and Current Monitoring
  • Temperature measurement system
  • Consumer electronics products
  • Factory Automation and Process Control