MAX9938FELT+T

Instrumentation, Op Amps, Buffer Amps Overview

The MAX9938FELT+T is a unidirectional high-side current-sense amplifier manufactured by Analog Devices Inc./Maxim Integrated. It features a gain of 50 V/V and operates with an input common-mode voltage range from 1.6V to 28V. The device offers a maximum quiescent supply current of 1μA, ensuring ultra-low power consumption suitable for battery-operated systems. Key electrical specifications include a maximum input offset voltage of 500μV and a maximum gain error of 0.5%. It is housed in a 6-pin μDFN package (2mm x 2mm) and is specified for operation over the -40°C to +85°C temperature range.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Ultra-low quiescent supply current of 1μa maximizes battery life in portable devices
• High precision accuracy with low input offset voltage and minimal gain error
• Wide input common-mode voltage range supports monitoring across various supply levels
• Compact 6-pin µdfn package design facilitates integration into space-constrained applications

Instrumentation, Op Amps, Buffer Amps Applications

• Cell Phones
• PDAs
• Power Management Systems
• Portable/Battery-Powered Systems
• Notebook Computers

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific ordering suffix to confirm the package type matches the required footprint. Confirm RoHS compliance status through official manufacturer documentation. Ensure the selected variant aligns with the necessary gain configuration for the target circuit design. Cross-reference the datasheet revision history for any updates to electrical characteristics or pin configurations before finalizing procurement.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when precise high-side current monitoring is required in low-power environments. The fixed 50 V/V gain suits applications where the sense resistor voltage drop must be amplified appropriately for ADC inputs. Consider the wide common-mode range if the system operates at varying supply voltages. Evaluate the thermal performance within the specified operating temperature range to ensure reliability under load conditions.

Instrumentation, Op Amps, Buffer Amps Part Context

This part belongs to the MAX9938 family of nanoPower current-sense amplifiers. Other variants in the series offer different gain values such as 25 V/V, 100 V/V, and 200 V/V. Alternative packages including UCSP and SOT23 are available within the same product line. These devices share core architectural features like low offset voltage and high common-mode rejection ratios.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

MAX9938TEUK+T

Instrumentation, Op Amps, Buffer Amps FAQ

What is the input common-mode voltage range?

The MAX9938FELT+T supports an input common-mode voltage range from 1.6V to 28V.

How does the device handle output overdrive?

The output is protected from input overdrive by an internal current limiting circuit and a clamp protection circuit.