LT6658BHMSE-1.8#TRPBF

Overview

The LT6658BHMSE-1.8#TRPBF is a precision dual output voltage reference from Analog Devices, operating within the H-grade temperature range of -40°C to +125°C. It provides a fixed nominal output voltage of 1.8V with an initial accuracy of ±0.1% and a maximum temperature coefficient of 20ppm/°C. The device features two independent outputs: Output 1 supports up to 150mA sourcing current, while Output 2 supports up to 50mA sourcing current. Both outputs utilize Kelvin sense connections for high load regulation and are stable with 1µF to 50µF output capacitors. The component is housed in a 16-lead MSOP package with an exposed thermal pad.

Feature Summary

• Dual-output architecture combining precision reference and linear regulator performance
• Kelvin sense connections ensure low load regulation across heavy loading conditions
• Separate supply pins allow for power consumption reduction and buffer isolation
• Integrated thermal shutdown and short-circuit protection mechanisms

Applications

• Driving reference inputs of high-resolution ADCs and DACs under heavy load
• Powering microcontrollers and supporting circuitry simultaneously
• Automotive control and monitoring systems
• Precision instrumentation and process control equipment

Procurement Notes

Verify that the specific suffix #TRPBF corresponds to tape and reel packaging rather than tube packaging when placing orders. Confirm the B-grade designation matches the required 0.1% accuracy and 20ppm/°C drift specifications for your application. Ensure the H-grade temperature rating meets the operational environmental requirements. Cross-reference the manufacturer part number against official distributor catalogs to confirm availability and authenticity.

Selection Notes

Select this component when dual isolated outputs with identical tracking are required for mixed-signal systems. The B-grade specification offers a balance of cost and performance for general precision applications. Consider the separate VIN1/VIN2 pins if independent power domains are needed to minimize noise coupling between the high-current Output 1 and sensitive Output 2.

Part Context

This part belongs to the LT6658 family of Refulators, which merge voltage reference stability with regulator drive capability. The 'B' indicates the B-grade accuracy tier, while 'H' denotes the extended industrial temperature range. The 'MSE' identifies the 16-lead MSOP package variant, and the '-1.8' specifies the fixed 1.8V nominal output voltage option available within the series.

Replacement Considerations

LT6658BHMSE-1.8#PBF (Tube Packaging)

FAQ

How does the LT6658 handle load regulation for heavy currents?

It utilizes Kelvin sense connections on both outputs to achieve typical load regulation of 0.1ppm/mA, maintaining accuracy even at maximum source currents.

What is the function of the OD pin?

The OD (Output Disable) pin allows the user to shut down the internal regulators to reduce power consumption when the outputs are not in use.