LT6109AHMS-1#PBF

Overview

The LT6109AHMS-1#PBF is a high-side current sense amplifier featuring an integrated precision reference and two comparators. It operates within a supply voltage range of 2.7V to 60V with a typical supply current of 550µA. The device incorporates a current sense amplifier with a maximum input offset voltage of 125µV and a signal bandwidth of 1MHz. Comparator threshold accuracy is specified at ±1.25% maximum total error. The component is housed in a 10-lead MSOP package and is rated for operation from –40°C to 125°C.

Feature Summary

• Integrates a precision current sense amplifier, internal voltage reference, and dual comparators for complete fault detection solutions.
• Features open-drain comparator outputs allowing flexible interface to various system components and digital supplies.
• Provides fast response capabilities with low propagation delay suitable for critical overcurrent and undercurrent event detection.

Applications

• Overcurrent, undercurrent, and general fault detection
• Current shunt measurement
• Motor control systems
• Automotive monitoring and control
• Industrial control applications

Procurement Notes

Verify the specific suffix AHMS-1#PBF against official Analog Devices documentation to confirm the A-grade performance specifications and -1 polarity configuration. Ensure the procurement channel sources genuine Linear Technology branded components. Confirm RoHS compliance status through the manufacturer's latest product change notifications or datasheet revision history prior to ordering.

Selection Notes

Select this variant when opposing polarity comparator configurations are required for distinct warning and disconnect thresholds. The 'A' grade ensures tighter offset voltage limits compared to standard grades. Verify that the 10-lead MSOP package fits the thermal and spatial constraints of the design. Ensure the external gain resistors are selected to maintain output current within the 1mA limit while meeting bandwidth requirements.

Part Context

This component belongs to the LT6109 family of high-side current sense amplifiers. The LT6109-1 version specifically configures its internal comparators with opposing polarities, enabling independent threshold setting for different fault conditions. This distinguishes it from the LT6109-2, which features comparators with the same polarity. The part integrates level-shifting capabilities directly into the amplifier architecture.

Replacement Considerations

LT6109AIMS-1#PBF offers similar functionality with industrial temperature range (-40°C to 85°C). LT6109HMS-1#PBF provides automotive temperature range (-40°C to 125°C) but with standard grade electrical specifications. LT6109IMS-1#PBF is the industrial grade standard specification equivalent.