MAX34417 SMBus Four-Channel Power Accumulator Analog Devices MAX34417 SMBus Four-Channel Power Accumulator is a specialized current and voltage monitor used to determine the power consumption of portable systems. The MAX34417 has a very wide 20,000:1 dynamic range for accurate measurement of power. The device is configured and monitored with a standard I2C/SMBus serial interface and the unidirectional current sensor offers precision high-side operation.