LT6108IMS8-2#TRPBF

Overview

The LT6108IMS8-2#TRPBF is a high-side current sense amplifier with an integrated comparator and reference, housed in an 8-lead MSOP package. It operates within a supply voltage range of 2.7V to 60V and features a maximum input offset voltage of 125µV and a gain error of 0.2%. The device includes a non-latching open-drain comparator output with a typical propagation delay of 1.4µs and a 1MHz bandwidth. It draws 450µA of supply current and supports operation from –40°C to 125°C.

Feature Summary

• Integrates a precision current sense amplifier with a user-configurable gain setting via external resistors.
• Includes an internal 400mV precision voltage reference for accurate threshold detection.
• Features a non-latching open-drain comparator output for flexible system interfacing.
• Provides fast response capabilities with low propagation delay for critical fault detection.

Applications

• Overcurrent and fault detection in power systems
• Current shunt measurement for battery monitoring
• Motor control applications requiring fast step response
• Automotive monitoring and control circuits

Procurement Notes

Verify the specific suffix IMS8-2#TRPBF corresponds to the non-latching comparator variant in the 8-lead MSOP package. Confirm the temperature grade matches industrial requirements. Ensure ordering documentation aligns with the manufacturer's lead-free finish specifications. Cross-reference the part marking code LTFNG for quality assurance during receipt inspection.

Selection Notes

Select this component when a non-latching comparator output is required for immediate fault indication without manual reset. The wide supply range up to 60V accommodates various bus voltages. The low offset voltage ensures accuracy in low-current sensing applications. Consider thermal management if operating near the upper temperature limits or in high-voltage environments.

Part Context

This device belongs to the LT6108 family of high-side current sense amplifiers. The -2 suffix denotes the version with a non-latching comparator, distinguishing it from the -1 variant which features a latching function. Both versions share identical amplifier characteristics and pinouts, differing only in the comparator behavior and the enable/reset pin configuration.

Replacement Considerations

LT6108IMS8-1#TRPBF: Identical amplifier and package but features a latching comparator instead of non-latching.

FAQ

What is the difference between the LT6108-1 and LT6108-2 variants?

The LT6108-1 features a latching comparator that requires a reset pulse to clear, while the LT6108-2 has a non-latching comparator that returns to its normal state immediately after the overcurrent condition clears.

How is the gain of the current sense amplifier configured?

The gain is set by two external resistors, RIN and ROUT. The output current is determined by VSENSE divided by RIN, and the output voltage is generated by passing this current through ROUT.