MAX4072ATA+T

Instrumentation, Op Amps, Buffer Amps Overview

The MAX4072ATA+T is a bidirectional, high-side current-sense amplifier from the MAX4069–MAX4072 family. It operates on a single supply of 2.7V to 24V and features a wide common-mode input range of 1.35V to 24V independent of the supply voltage. The device offers selectable gains of 50V/V or 100V/V via a Gain Select pin and utilizes an external reference input (REFIN) for flexible output referencing. It provides a total output error of less than 1.5% at room temperature and consumes only 100µA in normal operation, dropping to 10µA in shutdown mode.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Bidirectional high-side current sensing with continuous monitoring of charge and discharge transitions
• Wide common-mode input range independent of supply voltage for deep-discharge battery accuracy
• Flexible gain selection between 50V/V and 100V/V using an external sense resistor
• External reference input capability allowing precise output offset configuration

Instrumentation, Op Amps, Buffer Amps Applications

• Notebook fuel gauging
• Smart-battery packs and chargers
• Cell-phone battery-current monitoring
• Motor control systems
• Power-management systems

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix 'ATA+' against the manufacturer's official documentation to confirm the package type and RoHS compliance status. Ensure the REFIN pin is correctly connected to an appropriate external reference source within the specified voltage limits. Confirm that the selected gain setting aligns with the required full-scale sense voltage for the target application.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when an external reference voltage is required to set the output zero-current level. Verify that the system supply voltage falls within the 2.7V to 24V operating range. Consider the thermal dissipation requirements of the 8-pin Thin QFN-EP package if operating near maximum temperature limits. Ensure the external reference source can drive the REFIN pin without exceeding the specified input current constraints.

Instrumentation, Op Amps, Buffer Amps Part Context

This part belongs to the MAX4069–MAX4072 series of low-cost, bidirectional, high-side current-sense amplifiers designed for portable equipment. While other members of the family feature internal adjustable, 2.5V, or 1.5V references, the MAX4072 specifically provides a dedicated REFIN pin for external reference integration. This allows designers to tailor the output voltage swing relative to a custom reference point rather than a fixed internal value.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

MAX4072AUA+