LT6109IMS-1#PBF

Overview

The LT6109IMS-1#PBF is a high-side current sense amplifier with integrated reference and comparators. It features a 1 MHz bandwidth, 2.7V to 60V supply range, and 125 dB CMRR. The device includes an internal 400mV precision reference, two latching comparators with opposing polarity, and a 10-lead MSOP package. Operating temperature ranges from -40°C to 85°C.

Feature Summary

• Integrates a precision current sense amplifier with an internal 400mV voltage reference and two open-drain comparators.
• Features latching comparator outputs with reset capability for capturing overcurrent and undercurrent events.
• Provides direct access to amplifier and comparator inputs/outputs for flexible external configuration via resistors.

Applications

• Circuit fault protection with latching load disconnect
• Motor control error detection
• Battery monitoring systems

Procurement Notes

Verify the specific suffix IMS-1 against the datasheet ordering information to confirm the comparator polarity configuration and temperature grade. Ensure the component matches the 10-lead MSOP package specification. Cross-reference the manufacturer part number with authorized distributors to confirm availability status.

Selection Notes

Select this variant when opposing polarity comparators are required for distinct overcurrent and undercurrent flagging. Consider the 125µV maximum offset voltage for high-precision low-current applications. Evaluate the 1mA output drive capability against the external gain resistor requirements to ensure proper signal conditioning.

Part Context

This component belongs to the LT6109 family of high-side current sense amplifiers. The IMS-1 designation indicates the industrial temperature grade (-40°C to 85°C) and the specific comparator polarity configuration (opposing). It is designed for applications requiring fast response times and accurate current monitoring in automotive and industrial environments.

Replacement Considerations

LT6109AIMS-1#PBF offers improved electrical specifications 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 for distinct overcurrent and undercurrent flags, while the LT6109-2 has comparators connected in the same polarity.

How is the comparator latch reset?

The comparators can be reset by pulsing the EN/RST pin low for a duration between 2µs and 15µs.