LT6109AIMS-2#PBF

Overview

The LT6109AIMS-2#PBF is a high-side current sense amplifier with integrated reference and comparators. It operates on a supply voltage range of 2.7V to 60V with a typical supply current of 475µA at 2.7V. The device features a maximum input offset voltage of 125µV, a gain error of -0.2% maximum, and a signal bandwidth of 1MHz. Comparator thresholds are set by an internal 400mV reference with ±1.25% total threshold error. It includes two open-drain comparator outputs and functions within a temperature range of –40°C to 85°C.

Feature Summary

• Integrates a precision current sense amplifier with an internal 400mV voltage reference and two latching comparators.
• Features open-drain comparator outputs for easy interface to system components and supports latch reset functionality.
• Provides fast response capabilities with a typical propagation delay of 1.4µs and a 500ns step response time.
• Supports wide supply voltage operation from 2.7V to 60V with low shutdown current consumption.

Applications

• Overcurrent, undercurrent, and fault detection in power systems
• Current shunt measurement for battery monitoring
• Motor control applications requiring fast error detection
• Automotive monitoring and control circuits
• Remote sensing and industrial control systems

Procurement Notes

Verify the specific suffix #PBF indicates lead-free packaging and tube shipping format. Confirm the IMS-2 variant corresponds to comparators connected in the same polarity. Ensure the A-grade designation meets the stricter 125µV offset voltage requirement compared to standard grades. Check that the operating temperature range aligns with the specified –40°C to 85°C limit for this part number.

Selection Notes

Select this component when high-side sensing is required with integrated fault protection. The LT6109AIMS-2#PBF is suitable for applications needing simultaneous overcurrent and undercurrent detection with identical polarity flags. Consider the 1MHz bandwidth for dynamic load monitoring. Evaluate external resistor values for gain setting against the 1mA output current limit. Verify thermal dissipation requirements if operating near maximum supply voltages.

Part Context

This device belongs to the LT6109 family of high-side current sense amplifiers. It is distinct from the LT6109-1 variant, which features comparators with opposing polarities. The LT6109AIMS-2#PBF is housed in a 10-lead MSOP package. It serves as a complete solution for current monitoring by combining amplification, referencing, and comparison functions in a single small footprint.

Replacement Considerations

LT6109IMS-2#PBF offers the same functionality with a standard grade offset voltage specification.