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 35m 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. Both devices have a current output that can be converted to a ground-referred voltage with a single resistor, allowing a wide range of battery voltages and currents.

An open-collector SIGN output indicates current-flow direction, so the user can monitor whether a battery is being charged or discharged. Both devices operate from 3V to 36V, draw less than 100A over temperature, and include an 18A max shutdown mode.

Features:

1. Complete High-Side Current Sensing
2. Precision Internal Sense Resistor (MAX471)
3. 2% Accuracy Over Temperature
4. Monitors Both Charge and Discharge
5. 3A Sense Capability with Internal Sense Resistor (MAX471)
6. Higher Current-Sense Capability with External Sense Resistor (MAX472)
7. 100A Max Supply Current
8. 18A Max Shutdown Mode
9. 3V to 36V Supply Operation
10. 8-Pin DIP/SO Packages

Specifications:

1. Product: GY-471 MAX471 Current Sensor Module
2. Operating voltage: 3V to 36V
3. Operating current: +/- 3A
4. Sensor: MAX471
5. Sensor output: 1V / Amp
6. Soldering: Unsoldered components
7. Customization: Suitable for electronic projects
8. Application: Current measurement in circuits
9. Length: 20mm
10. Width: 18mm

Package Includes:

1 x Unsoldered GY-471 3A Range MAX471 Current Sensor Module