LT6109AIMS-1#TRPBF

Overview

The LT6109AIMS-1#TRPBF is a high-side current sense amplifier with integrated reference and comparators in a 10-lead MSOP package. It operates from 2.7V to 60V supply voltage with 550µA typical supply current. The device features a precision current sense amplifier with 125µV maximum input offset voltage and 0.2% maximum gain error. It includes two latching comparators with opposing polarity, configured for overcurrent and undercurrent detection. The internal 400mV reference sets comparator thresholds with ±1.25% maximum total threshold error. The device supports fast step response of 500ns and 1MHz bandwidth.

Feature Summary

• Integrated high-side current sense amplifier with low offset voltage and high common-mode rejection
• Dual latching comparators with opposing polarity for simultaneous overcurrent and undercurrent flagging
• Internal 400mV precision voltage reference for accurate comparator threshold setting
• Open-drain comparator outputs allowing flexible interface to various system logic levels

Applications

• Circuit fault protection with latching load disconnect and early warning indication
• Motor control systems requiring fast overcurrent detection
• Battery monitoring and management systems
• Industrial control applications needing precise current shunt measurement

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when ordering. Confirm the A grade designation meets your offset voltage requirements of 125µV maximum. Ensure the I grade temperature range (-40°C to 85°C) is sufficient for your operating environment, as H grade extends to 125°C. Check that the 10-lead MSOP package fits your PCB layout constraints. Validate that the 60V maximum supply voltage aligns with your system power rails.

Selection Notes

Select this component when opposing polarity comparator outputs are required for distinct overcurrent and undercurrent signaling. The A grade offers tighter offset voltage specifications compared to standard grades. Consider the 1MHz bandwidth if high-speed error detection is critical for your application. Evaluate the external resistor network requirements for setting gain and comparator thresholds against your available component values. Verify shutdown current consumption meets low-power standby requirements.

Part Context

This part belongs to the LT6109 family of high-side current sense amplifiers. The -1 variant specifically configures the internal comparators with opposing polarity, unlike the -2 variant which uses same-polarity configuration. The A suffix denotes improved electrical performance characteristics, particularly regarding input offset voltage. The IMS-1 designation identifies the industrial temperature grade version within the MSOP package format.

Replacement Considerations

LT6109AIMS-1#PBF is the lead-free tray equivalent. LT6109IMS-1#TRPBF is the standard grade alternative with higher offset voltage. LT6109AHMS-1#TRPBF provides extended temperature range up to 125°C. LT6109AIMS-2#TRPBF offers same-polarity comparator configuration instead of opposing.