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MAX472 - Precision / High-Side Current-Sense Amplifiers

Description

The MAX471/MAX472 are complete, bidirectional, highside current-sense amplifiers for portable PCs, telephones, and other systems where battery/DC power-line monitoring is critical.

Features

  • o Complete High-Side Current Sensing o Precision Internal Sense Resistor (MAX471) o 2% Accuracy Over Temperature o Monitors Both Charge and Discharge o 3A Sense Capability with Internal Sense Resistor (MAX471) o Higher Current-Sense Capability with External Sense Resistor (MAX472) o 100µA Max Supply Current o 18µA Max Shutdown Mode o 3V to 36V Supply Operation o 8-Pin DIP/SO Packages MAX471/MAX472 ______________Ordering Information PART MAX471CPA MAX471CSA MAX471EPA MAX471ESA MAX472CPA MAX472C.

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Full PDF Text Transcription

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19-0335; Rev 2; 12/96 Precision, High-Side Current-Sense Amplifiers _______________General Description The MAX471/MAX472 are complete, bidirectional, highside current-sense amplifiers for portable PCs, telephones, and other systems where battery/DC power-line monitoring is critical. High-side power-line monitoring is especially useful in battery-powered systems, since it does not interfere with the ground paths of the battery chargers or monitors often found in “smart” batteries. The MAX471 has an internal 35mΩ current-sense resistor and measures battery currents up to ±3A. For applications requiring higher current or increased flexibility, the MAX472 functions with external sense and gain-setting resistors.
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