MAX4172ESA+T

Instrumentation, Op Amps, Buffer Amps Overview

The MAX4172ESA+T is a low-cost, precision, high-side current-sense amplifier manufactured by Analog Devices Inc./Maxim Integrated. It operates with a supply voltage range of 3V to 32V and supports an input common-mode voltage from 0V to 32V, independent of the supply rail. The device features a transconductance of 10mA/V, providing a current output proportional to the sense voltage across an external resistor. Key electrical parameters include a bandwidth of 800kHz at full-scale sense voltage and 200kHz at lower levels. It includes an open-collector power-good (PG) output indicating adequate supply voltage for proper operation.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• High-side monitoring capability with a wide common-mode voltage range that remains functional down to 0V, ensuring viability during deep battery discharge conditions.

Instrumentation, Op Amps, Buffer Amps Applications

• Portable PCs including notebooks, subnotebooks, and palmtops
• Closed-loop battery chargers and general-purpose current sources
• Smart-battery packs and portable cellular phones
• Battery-powered or portable equipment requiring DC power-line monitoring

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix 'ESA+T' corresponds to the SOIC-8 package and tape-and-reel delivery format. Confirm the temperature grade matches the required operational environment, as the 'E' designation indicates -40°C to +85°C coverage. Ensure the RoHS-compliant status aligns with environmental regulations for the target assembly process.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when high-side current sensing is required in systems where the load voltage exceeds the amplifier's supply voltage. The fixed internal gain simplifies design by eliminating the need for external precision resistors for gain setting. Consider the 10mA/V transconductance for straightforward interface to ADCs or control loops via a single output resistor.

Instrumentation, Op Amps, Buffer Amps Part Context

This part belongs to the MAX4172 family of high-side current-sense amplifiers designed for portable electronics. It shares architectural similarities with other Maxim Integrated current-sense devices but is distinguished by its specific unidirectional topology and integrated power-good indicator. The family targets applications demanding accurate current monitoring without interfering with ground paths.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.