The LHA7918 device is a 16-bit, SPI-compatible, high-precision, low-power analog-to-digital converter (ADC) in small DFN-10 and MSOP-10 packages. The LHA7918 device integrates a low-drift voltage reference and oscillator. The LHA7918 also includes a Programmable Gain Amplifier (PGA). These features, combined with a wide operating supply voltage range, make the LHA7918 ideal for power-constrained and space-constrained sensor measurement applications.
The LHA7918 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 LHA7918 has an input multiplexer (MUX) that enables two pairs of differential input measurements or four single-ended input measurements.
The LHA7918 can operate in either continuous-conversion mode or 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
  • Four single-ended inputs or two differential inputs
  • Internal Programmable Gain Amplifier (PGA)< /li>
  • Working temperature range: -40°C to +125°C

Application Scenario

  • Temperature measurement:
  •  - Thermocouple measurement
  •  - Cold junction compensation
  •  - Thermistor measurement
  • Portable instrument
  • factory automation and process control