LT6657BHMS8-3#PBF

Overview

The LT6657BHMS8-3#PBF is a precision buffered voltage reference with a fixed 3V output. It features an initial accuracy of 0.1% and a maximum temperature drift of 3ppm/°C. The device operates over a supply range from VOUT + 50mV to 40V, supporting ±10mA drive current. Key specifications include 0.5ppm P-P noise (0.1Hz to 10Hz), line regulation of 2ppm/V, and load regulation of 10µV/mA. It includes reverse supply/output protection, thermal shutdown, and a low-power shutdown mode consuming less than 4µA.

Feature Summary

• Advanced curvature compensation for extremely low drift and predictable temperature behavior
• Buffered output capable of sourcing and sinking 10mA with low output impedance
• Configurable as a negative voltage reference or operated in shunt mode
• Integrated reverse battery protection, short-circuit protection, and thermal shutdown

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 suffix #PBF indicates RoHS compliance when ordering. Confirm the B grade designation matches the required 3ppm/°C temperature coefficient specification. Ensure the MSOP-8 package dimensions align with the target PCB footprint. Check for availability constraints as distribution status may vary.

Selection Notes

Select this component when a stable 3V reference is required with moderate drift tolerance. The B grade offers a balance between performance and cost compared to the A grade. Consider the low dropout capability for tight supply margins. Verify that the 10mA drive current meets the load requirements without excessive self-heating errors.

Part Context

This part belongs to the LT6657 family of precision voltage references. It shares the same core architecture and pinout as other variants in the series, differing primarily in output voltage options and temperature coefficient grades. The family is designed for high-performance applications requiring robust operation across wide industrial and automotive temperature ranges.

Replacement Considerations

LT6657AHMS8-3#PBF

FAQ

Can the LT6657BHMS8-3#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 voltage differential required?

The device requires a minimum differential of 50mV above the output voltage to maintain regulation, except for the 1.25V option which has different requirements.