SMBus Dual/Quad Current Monitor

The MAX34408 and MAX34409 are two- and four-channel current monitors that are configured and monitored with a standard I2C/SMBus serial interface. Each unidirectional current sensor offers precision high-side operation with a low full-scale sense voltage. The devices automatically sequence through two or four channels and collect the current-sense samples and average them to reduce the effect of impulse noise. The raw ADC samples are compared to user-programmable digital thresholds to indicate overcurrent conditions. Overcurrent conditions trigger a hardware output to provide an immediate indication to shut down any necessary external circuitry.

Applications

* Base Stations * Industrial Controls * Network Switches and Routers * Servers * Smart Grid Network Systems

* Enables Accurate Current Consumption Measurement on Up to Four Rails with Digital Serial Readout

* Low 12.25mV Full-Scale Current-Sense Voltage

* Automatic Round Robin Sequencing to Sample Each Current-Sense Input

* Selectable Averaging to Improve Current-Sense Accuracy

* Programmable Digital Overcurrent Thresholds with Delay Function

* I2C/SMBus Interface with Bus Timeout

* Register Access to Real-Time Current Measurements

* Compatible on a Wide Range of Voltage Rails

* Wide 2.5V to 13.2V Common-Mode Range

* Automatic System Shutdown on Overcurrent Condition

* Shutdown Output Provides Immediate Hardware Indication of Overcurrent