Maxim Integrated MAXQ314

Description
The MAXQ314 is a dedicated power-measurement IC that collects and calculates voltage, current, power, and power factor for a single-phase load. The results can be retrieved by an external master through the internal I²C bus. This bus is also used by the external master to configure the operation of the MAXQ314 and monitor the status of operations.
The MAXQ314 performs voltage and current measurements using an integrated ADC that can measure voltage and current. Other values such as power are calculated from that data. The MAXQ314 also has an integrated temperature sensor that provides the die temperature on demand. The internal current amplifier produces up to 32x gain and the voltage amplifier gain is 1x.

Features
High-Performance, Low-Power DSP Core
On-Chip Digital Temperature Sensor
Precision Internal Voltage Reference
Active Power (W), < ±0.5% Error
Reactive Power (VAR), <10.7% Error
Apparent Power (VA), < 0.7% Error
Power Factor, < ±1% Error
Voltage RMS, < ±0.2% Error
Current RMS, < ±0.5% Error
I²C-Compatible Serial Interface
Continuous Output of IRMS in Serial or PWM

Applications
Single-Phase AC Power Monitoring