LHA7904
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 range: 2.7 V to 5.5 V
- Low power consumption: 150 μA (Continuous Conversion Mode)
- Programmable data conversion rate: 25 SPS to 4 kSPS
- Single-cycle settling
- Integrated low-drift voltage reference
- Internal oscillator
- I²C interface with four pin-selectable device addresses
- 4 single-ended inputs or 2 differential input channels
- Programmable digital comparator
- Operating 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
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