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

  • Wide supply voltage: 2.2V to 5.5V
  • Low power consumption: 150μA (continuous conversion mode)
  • Programmable data transfer rate: 6.25SPS to 1K SPS
  • single cycle stability
  • Internal low-drift voltage reference
  • internal oscillator
  • I2C Interface: four pins optional address
  • Four single-ended inputs or two differential inputs
  • programmable comparator
  • Working temperature range: -40°C to +125°C

Application Scenario

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