MAX4376, MAX4377, MAX4378 Single/Dual/Quad High-Side Current-Sense Amplifiers With Internal Gain
The MAX4376 MAX4377 MAX4378 single, dual, and quad precision high-side current-sense Amplifiers are available in space-saving packages. They feature buffered voltage outputs that eliminate the need for gain-setting resistors and are ideal for today's notebook computers, cell phones, and other systems where current monitoring is critical. For example, MAX4376TAUK is a single high-side Amplifier with a gain of 20.
High-side current monitoring is especially useful in battery-powered systems since it does not interfere with the ground path of the Battery Charger The input common-mode range of 0 to +28V is independent of the supply voltage and ensures that the current-sense feedback remains viable even when connected to a battery pack in deep discharge.
The full-scale current reading CAN be set by choosing the appropriate voltage gain and external-sense resistor. This capability offers a high level of integration and flexibility, resulting in a simple and compact current-sense solution.
The MAX4376 MAX4377 MAX4378 operate over a supply voltage range of +3V to +28V, draw 1mA of supply current per Amplifier and operate over the full automotive temperature range of -40C to +125C. These devices have a wide bandwidth of 2MHz, making them suitable for use inside battery-charger control loops. The buffered outputs drive up to 2mA of output current into a ground-referenced load.
The MAX4376 is available in a tiny 5-pin SOT23 package. The MAX4377 MAX4378 are available in space-saving 8-pin MAX and 14-pin TSSOP packages, respectively.
By Maxim Integrated Products
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