LT6109IMS-2#PBF

Overview

The LT6109IMS-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. The device features a 1MHz bandwidth, 125dB common-mode rejection ratio, and 60nA input bias current. It includes two comparators with the same polarity configuration, an internal 400mV precision reference, and open-drain outputs. The component is specified for operation from -40°C to 85°C and is housed in a 10-lead MSOP package.

Feature Summary

• Integrates a precision current sense amplifier with an internal 400mV voltage reference and two comparators configured with the same polarity.
• Provides fast response capabilities with a total propagation delay of typically 1.4µs and a signal bandwidth of 1MHz.
• Features open-drain comparator outputs that allow easy interface to system components and support latching functionality.

Applications

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

Procurement Notes

Verify the specific suffix IMS-2 against the manufacturer's ordering information to confirm the industrial temperature grade (-40°C to 85°C) and the dual-comparator same-polarity configuration. Ensure compatibility with the 10-lead MSOP package dimensions and soldering requirements during integration.

Selection Notes

Select this variant when a high-side sensing solution with dual same-polarity comparators is required. The low offset voltage and high common-mode rejection make it suitable for accurate measurements across wide supply ranges. Consider the external resistor network for gain setting and threshold configuration to meet specific application timing and accuracy needs.

Part Context

This component belongs to the LT6109 family, which offers high-side current sensing with integrated protection features. The LT6109-2 version specifically provides comparators with the same polarity, distinguishing it from the LT6109-1 which has opposing polarity comparators. Both versions share the same core amplifier specifications and package options.

Replacement Considerations

LT6109HMS-2#PBF

FAQ

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

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

How are the comparator trip points configured?

The amplifier gain and comparator trip points are configured by external resistors connected to the INC1 and INC2 pins.