LT6108HDCB-1

Overview

The LT6108HDCB-1 is a high-side current sense amplifier with an integrated comparator and reference, housed in an 8-lead DFN package. It operates within a supply voltage range of 2.7V to 60V and supports temperatures from -40°C to 125°C. The device features a maximum input offset voltage of 125µV, a gain error of 0.2% maximum, and a signal bandwidth of 1MHz. Supply current is typically 450µA, reducing to 5µA maximum in shutdown mode.

Feature Summary

• Integrates a precision current sense amplifier with a latching comparator and internal 400mV reference
• Provides fast response capabilities with a typical propagation delay of 1.4µs for overcurrent detection
• Features low offset voltage and gain error to ensure accurate measurement across wide dynamic ranges
• Supports direct connection to the positive side of the sense resistor for simplified high-side monitoring

Applications

• Circuit fault protection with very fast latching load disconnect
• Motor control systems requiring error detection
• Automotive monitoring and control applications
• Industrial control and remote sensing

Procurement Notes

Verify that the specific part number corresponds to the H grade for extended temperature operation up to 125°C. Confirm the DCB package variant matches the required footprint. Ensure the -1 suffix indicates the latching comparator version suitable for your system's reset logic requirements.

Selection Notes

Select this component when high-side current monitoring requires both amplification and immediate fault flagging. The latching comparator output simplifies system recovery by maintaining the fault state until explicitly reset. Consider the external resistor network for setting gain and threshold levels based on the specific sense voltage and load requirements.

Part Context

This device belongs to the LT6108 family of high-side current sense amplifiers. The LT6108-1 variant specifically includes a latching comparator, distinguishing it from the non-latching LT6108-2. The H designation indicates industrial temperature grading, while the DCB suffix specifies the compact plastic DFN package form factor.

Replacement Considerations

LT6108IDCB-1#TRMPBF

FAQ

What is the function of the EN/RST pin on the LT6108-1?

The EN/RST pin serves as both the enable input and the latch reset input. Pulling it low for a specific duration resets the latching comparator.

How is the comparator threshold configured?

The comparator threshold is set using an external resistor divider connected to the INC pin, referencing the internal 400mV precision reference.