LT6657BHMS8-2.5#PBF

Overview

The LT6657BHMS8-2.5#PBF is a precision buffered voltage reference with a 2.5V output, housed in an 8-lead MSOP package. It features a maximum temperature drift of 3ppm/°C and an initial accuracy of ±0.1%. The device operates over a –40°C to 125°C range, supports a supply voltage up to 40V, and provides ±10mA drive capability. Key electrical parameters include 0.5ppm P-P noise (0.1Hz to 10Hz), line regulation of 2ppm/V, and load regulation of 10µV/mA.

Feature Summary

• Advanced curvature compensation for extremely low drift and predictable temperature behavior
• Buffered output stage capable of sourcing and sinking current with low output impedance
• Incorporates reverse supply protection, reverse output protection, and thermal shutdown
• Configurable as a negative voltage reference or operated in shunt mode

Applications

• High resolution data acquisition systems
• Instrumentation and process control
• Automotive control and monitoring
• Medical equipment
• Shunt and negative voltage references

Procurement Notes

Verify the specific B grade designation ensures a 3ppm/°C maximum temperature coefficient rather than the A grade specification. Confirm the #PBF suffix indicates RoHS compliance. Ensure the MSOP-8 package matches the target PCB footprint and that the operating temperature range aligns with system requirements.

Selection Notes

Select this component when high precision is required alongside bidirectional current drive capabilities. The buffered architecture simplifies layout by eliminating the need for external op-amps. Consider the low dropout characteristics for applications requiring minimal input-to-output voltage differentials.

Part Context

This part belongs to the LT6657 family of precision voltage references designed for robust operation in demanding environments. The series combines bandgap technology with advanced compensation techniques to achieve superior stability compared to standard references.

Replacement Considerations

LT6657AHMS8-2.5#PBF offers identical functionality with a tighter 1.5ppm/°C drift specification.

FAQ

Can the LT6657BHMS8-2.5#PBF operate as a negative voltage reference?

Yes, the high sink current capability allows it to function as a negative voltage reference while maintaining the same precision as positive reference operation.

What is the minimum input-to-output differential voltage required?

For the 2.5V option, the minimum VIN to VOUT differential is typically 50mV at zero load current.