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MAX34409：SMBus Dual/Quad Current Monitor

Accurate Current Measurement with Automatic Overcurrent Shutdown for Four Supply Rails

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.

Key Features 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

MAX34408, MAX34409: Typical Application Circuit and Block Diagram Applications/Uses Base Stations Industrial Controls Network Switches and Routers Servers Smart Grid Network Systems

DataSheet

Parametrics

Design kits & evaluation modules

• MAX34409EVKIT

Quality and Environmental Data

• MAX34409.pdf

Ordering Information