LT6109IMS-2#TRPBF

Overview

The LT6109IMS-2#TRPBF is a high-side current sense amplifier with an integrated voltage reference and two comparators. It operates from a supply voltage range of 2.7V to 60V with a typical supply current of 550µA. The device features a precision current sense amplifier with a maximum input offset voltage of 125µV and a gain error of 0.2% maximum. It includes two open-drain comparator outputs configured in the same polarity for the -2 version, with a total threshold error of ±1.25% maximum. The component is specified for operation from –40°C to 85°C and is housed in a 10-lead MSOP package.

Feature Summary

• Integrated high-side current sense amplifier with low offset voltage and configurable gain via external resistors
• Dual comparators with internal 400mV reference and latching capability for fault detection
• Wide supply voltage range supporting operation up to 60V
• Open-drain comparator outputs allowing easy interface to system components

Applications

• Overcurrent and undercurrent fault detection
• Current shunt measurement
• Motor control systems
• Battery monitoring
• Industrial control applications

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when sourcing. Confirm the IMS designation corresponds to the industrial temperature grade of –40°C to 85°C. Ensure the -2 variant matches the required comparator polarity configuration for the design. Cross-reference the manufacturer's latest documentation for any updates to pinout or electrical characteristics.

Selection Notes

Select this component for applications requiring precise high-side current monitoring with integrated fault protection. The -2 variant provides comparators with the same polarity, suitable for unified warning and disconnect signaling. Consider the 125µV maximum offset voltage for low-current accuracy requirements. Evaluate the 60V maximum supply voltage against the system power rails to ensure safe operation within absolute maximum ratings.

Part Context

This part belongs to the LT6109 family of high-side current sense amplifiers. The LT6109 integrates a precision amplifier, voltage reference, and comparators into a single small package. The IMS-2 variant specifically configures the internal comparators for same-polarity operation, distinguishing it from the -1 version which uses opposing polarities. It is designed for robust industrial and automotive environments.

Replacement Considerations

LT6109AIMS-2#TRPBF offers higher precision grades within the same package and polarity configuration.

FAQ

What is the difference between the LT6109-1 and LT6109-2 variants?

The LT6109-1 has comparators connected in opposing polarity, while the LT6109-2 has comparators connected in the same polarity.

How is the gain of the current sense amplifier set?

The gain is configured by external resistors, specifically RIN and ROUT, where the voltage gain is determined by the ratio of these resistors.