LTC6655BHLS8-5

Overview

The LTC6655BHLS8-5 is a precision bandgap voltage reference from Analog Devices, offering an output of 5V with ±0.025% initial accuracy and a maximum temperature coefficient of 2ppm/°C. It operates within a –40°C to 125°C range and features low noise (0.25ppm P-P at 0.1Hz to 10Hz) and high line/load regulation. The device utilizes a hermetic 8-lead LS8 package (5mm × 5mm LCC), providing superior stability and immunity to humidity compared to plastic packages.

Feature Summary

• Hermetic 8-lead LS8 package ensures outstanding long-term stability and eliminates humidity sensitivity
• Advanced curvature compensation achieves ultra-low drift and high accuracy without calibration
• Capable of sourcing and sinking current for versatile load regulation performance
• Includes a shutdown mode for significant power reduction in battery-operated systems

Applications

• Instrumentation and test equipment requiring high-resolution measurements
• High resolution data acquisition systems
• Precision battery monitors
• Medical equipment

Procurement Notes

Verify the specific LS8 package variant against design requirements due to its hermetic nature and distinct handling characteristics. Confirm that the 5V output aligns with system needs. Ensure PCB layout accounts for mechanical stress on the ceramic package to maintain specified hysteresis performance. Check availability as this component may have restricted supply status.

Selection Notes

Select the LTC6655BHLS8-5 when extreme long-term stability and humidity resistance are critical, distinguishing it from the MS8 plastic variants. The B-grade offers tighter accuracy (±0.025%) than the C-grade. Consider the higher cost and larger footprint of the LS8 package against the need for hermetic sealing in harsh environments or high-reliability applications.

Part Context

Part of the LTC6655 family of precision references designed for demanding automotive and industrial applications. The LS8 package variant specifically targets environments where moisture ingress could degrade performance in standard plastic packages. It shares electrical characteristics with other LTC6655 models but differs in physical construction and thermal/mechanical robustness.

Replacement Considerations

LTC6655CHLS8-5#PBF

FAQ

How does the LS8 package affect humidity sensitivity?

The LS8 package is hermetic, meaning it is not affected by humidity changes, unlike plastic packages which can absorb water and cause output voltage shifts.

What is the minimum dropout voltage for the LTC6655BHLS8-5?

The device requires a minimum dropout of 500mV above the output voltage to operate correctly.