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Maxim current-sense amplifiers handle 76V

Posted: 04 Nov 2002 ?? ?Print Version ?Bookmark and Share

Keywords:maxim integrated products? max4080? max4081? current sense amplifier?

The MAX4080/MAX4081 high-side, current-sense amplifiers from Maxim Integrated Products handle voltages up to 76V and accurately monitor currents in automotive, telecom, backplane, and other high-voltage applications.

The MAX4080 measures current flowing in one direction, while the bidirectional MAX4081 measures charge and discharge currents, making it suitable for use with 42V automobile batteries. The MAX4081 also uses an external reference to set the zero-current null voltage.

When measuring the output voltage with respect to the reference voltage, the IC continuously monitors the transition from charge to discharge and gives an accurate bidirectional output in a single-supply system without the need for a separate polarity pin.

Both draw 100mA supply current, 100mV offset voltage, and exhibits 0.1 percent full-scale gain accuracy. They are screened for operation over the automotive temperature range and are available in 8-pin ?MAX or SO packages. Prices start at 85 cents (1,000-up).

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