General Description

The MAX34427 is a specialized current, voltage, and power monitor used to determine power consumption of systems. The device has a very wide dynamic range (20,000:1) that allows for the accurate measurement of power in such systems. The device is configured and monitored with a standard I2C/SMBus serial interface. The unidirectional current sensor offers precision high-side operation with a low full-scale sense voltage. The device automatically collects the current-sense and voltage samples and then multiplies those values to obtain a power value it then accumulates. Upon a command from the host, the device transfers the accumulated power samples, as well as the accumulation count, to a set of registers accessible by the host. This transfer occurs without missing a sample and allows the host to retrieve the data not only in real-time, but at any time interval.

Benefits and Features

• Enables Code Optimization to Minimize Power Consumption

• Two Power Monitors with Wide 86dB Dynamic Range

• Measures Both Current and Voltage

• Ability to Measure Only Accumulated Current or Accumulated Power

• Reduced Power Consumption in Slow Accumulation Mode

• Power-Down Mode

• Minimizes Processor Overhead with Autonomous Operation

• Per Channel 56-Bit Power Accumulators Capture 2.27 Hours of Data at 2048 Samples per Second

• Per Channel 14-Bit Voltage Registers

• High-Integration Solution Minimizes Part Count, PCB Space, and BOM Cost

• 5μV to 100mV Current-Sense Voltage with Current Common-Mode Range of 0.5V to 24V

• 16 Programmable I2C Addresses

• I2C/SMBus Interface with Bus Timeout

• Temperature Range: -40°C to +85°C

• Small, 2.24mm x 1.91mm Footprint WLP with 12 Bumps at 0.5mm Pitch and 3mm x 3mm Footprint TDFN 12-pin package

• Ease of Development

• Evaluation Kit with Advanced GUI

Applications

• Tablets

• Ultra Notebooks

• Workstations

• Servers

• VR/AR Headsets