TSM9938HEUK+

Instrumentation, Op Amps, Buffer Amps Overview

The TSM9938HEUK+ is a high-side current-sense amplifier manufactured by Silicon Labs, serving as an alternate source for the MAX9938. It features a fixed gain of 100 V/V and operates within a common-mode voltage range of 1.6V to 28V. The device consumes a typical supply current of 1µA and exhibits a maximum input offset voltage of 500µV at +25°C. It is housed in a 5-pin SOT-23 package and is specified for operation over an extended temperature range of -40°C to +85°C.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Ultra-low supply current consumption optimized for battery-powered applications
• Wide input common-mode voltage range supporting high-side sensing up to 28V
• Low input offset voltage ensuring precision measurement accuracy
• Fixed internal gain configuration providing stable signal amplification

Instrumentation, Op Amps, Buffer Amps Applications

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

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm lead-free packaging compliance and check for specific ordering suffixes such as tape and reel quantities. Ensure the part number matches the exact gain option required for the design. Review datasheet specifications against application requirements before procurement.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when a fixed 100 V/V gain is required for high-side current monitoring. Consider the wide common-mode range for systems with varying supply voltages. Evaluate the low power consumption benefits for portable devices. Compare performance metrics against alternative sources if form-factor compatibility is critical for the PCB layout.

Instrumentation, Op Amps, Buffer Amps Part Context

This device belongs to the TSM9938 series of precision current-sense amplifiers. It is electrically and form-factor identical to the Maxim Integrated MAX9938. The series offers multiple gain options including 25, 50, 100, and 200 V/V variants. The TSM9938HEUK+ specifically denotes the 100 V/V gain version in a lead-free SOT-23-5 package.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

The TSM9938HEUK+ is an alternate-source equivalent for the MAX9938H. Designers may substitute this part for the original Maxim Integrated device without circuit modifications due to electrical and form-factor identity. Verify that the replacement meets all absolute maximum ratings and operating temperature specifications.