LT6109

RECOMMENDED FOR NEW DESIGNS

High Side Current Sense Amplifier with Reference and Comparators

Data Sheet Product Selection Table

Part Models: 16
1ku List Price: Starting From $2.24

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Overview

Current Sense Amplifier

Fast Step Response: 500ns
Low Offset Voltage: 125μV Maximum
Low Gain Error: 0.2% Maximum

Internal 400mV Precision Reference
Internal Latching Comparators with Reset

Fast Response Time: 500ns
Total Threshold Error: ±1.25% Maximum
Two Comparator Polarity Options

Wide Supply Range: 2.7V to 60V
Supply Current: 550μA
Low Shutdown Current: 5μA Maximum
Specified for –40°C to 125°C Temperature Range
Available in 10-Lead MSOP Package

The LT6109 is a complete high side current sense device that incorporates a precision current sense amplifier, an integrated voltage reference and two comparators. Two versions of the LT6109 are available. The LT6109-1 has the comparators connected in opposing polarity and the LT6109-2 has the comparators connected in the same polarity. In addition, the current sense amplifier and comparator inputs and outputs are directly accessible. The amplifier gain and comparator trip points are configured by external resistors. The open-drain comparator outputs allows for easy interface to other system components.

The overall propagation delay of the LT6109 is typically only 1.4μs, allowing for quick reaction to overcurrent and undercurrent conditions. The 1MHz bandwidth allows the LT6109 to be used for error detection in critical applications such as motor control. The high threshold accuracy of the comparators, combined with the ability to latch both comparators, ensures the LT6109 can capture high speed events.

The LT6109 is fully specified for operation from –40°C to 125°C, making it suitable for industrial and automotive applications. The LT6109 is available in a small 10-lead MSOP.

Applications

Overcurrent, Undercurrent and Fault Detection
Current Shunt Measurement
Battery Monitoring
Motor Control
Automotive Monitoring and Control
Remote Sensing
Industrial Control

Part Models: 16
1ku List Price: Starting From $2.24

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LT6109AHMS-1#PBF	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT6109AHMS-1#TRPBF	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT6109AHMS-2#PBF	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT6109AHMS-2#TRPBF	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT6109AIMS-1#PBF	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT6109AIMS-1#TRPBF	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT6109AIMS-2#PBF	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT6109AIMS-2#TRPBF	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT6109HMS-1#PBF	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT6109HMS-1#TRPBF	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT6109HMS-2#PBF	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT6109HMS-2#TRPBF	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT6109IMS-1#PBF	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT6109IMS-1#TRPBF	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT6109IMS-2#PBF	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT6109IMS-2#TRPBF	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jun 5, 2024 - 24_0003 Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)
		PCN24_0003_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LT6109AHMS-1#PBF	PRODUCTION
LT6109AHMS-1#TRPBF	PRODUCTION
LT6109AHMS-2#PBF	PRODUCTION
LT6109AHMS-2#TRPBF	PRODUCTION
LT6109AIMS-1#PBF	PRODUCTION
LT6109AIMS-1#TRPBF	PRODUCTION
LT6109AIMS-2#PBF	PRODUCTION
LT6109AIMS-2#TRPBF	PRODUCTION
LT6109HMS-1#PBF	PRODUCTION
LT6109HMS-1#TRPBF	PRODUCTION
LT6109HMS-2#PBF	PRODUCTION
LT6109HMS-2#TRPBF	PRODUCTION
LT6109IMS-1#PBF	PRODUCTION
LT6109IMS-1#TRPBF	PRODUCTION
LT6109IMS-2#PBF	PRODUCTION
LT6109IMS-2#TRPBF	PRODUCTION
Feb 4, 2020 - 20_0130 Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0130_Form Material_Report
LT6109AHMS-1#PBF	PRODUCTION
LT6109AHMS-1#TRPBF	PRODUCTION
LT6109AHMS-2#PBF	PRODUCTION
LT6109AHMS-2#TRPBF	PRODUCTION
LT6109AIMS-1#PBF	PRODUCTION
LT6109AIMS-1#TRPBF	PRODUCTION
LT6109AIMS-2#PBF	PRODUCTION
LT6109AIMS-2#TRPBF	PRODUCTION
LT6109HMS-1#PBF	PRODUCTION
LT6109HMS-1#TRPBF	PRODUCTION
LT6109HMS-2#PBF	PRODUCTION
LT6109HMS-2#TRPBF	PRODUCTION
LT6109IMS-1#PBF	PRODUCTION
LT6109IMS-1#TRPBF	PRODUCTION
LT6109IMS-2#PBF	PRODUCTION
LT6109IMS-2#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Analog to Digital Converters (ADCs) 1
LTC2991	RECOMMENDED FOR NEW DESIGNS	Octal I²C Voltage, Current, and Temperature Monitor

Parts	Product Life Cycle	Description
LT6108	RECOMMENDED FOR NEW DESIGNS	High Side Current Sense Amplifier with Reference and Comparator

Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LT6109-1
LT6109-2

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.