LT6657AHMS8-1.25#PBF

Voltage Reference Overview

The LT6657AHMS8-1.25#PBF is a precision buffered voltage reference with an output of 1.25V and initial accuracy of ±0.1%. It features A-grade temperature drift of 1.5ppm/°C and low noise (0.5ppm P-P, 0.1Hz to 10Hz). The device operates from a supply as low as 1.5V above the output up to 40V, providing ±10mA drive current. It includes reverse polarity protection, thermal shutdown, and a low-power shutdown mode consuming less than 4µA.

Voltage Reference Feature Summary

• Advanced curvature compensation for extremely low drift and predictable temperature behavior
• Buffered output capable of sourcing and sinking 10mA with precise load regulation
• Incorporates reverse battery protection, short-circuit current limiting, and thermal shutdown
• Configurable for negative voltage reference operation or shunt mode applications

Voltage Reference Applications

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

Voltage Reference Procurement Notes

Verify the specific ordering suffix #PBF indicates RoHS compliance when procuring. Confirm that the A-grade designation corresponds to the required 1.5ppm/°C maximum drift specification for your design. Ensure the MSOP-8 package dimensions match your PCB footprint requirements before finalizing orders.

Voltage Reference Selection Notes

Select this component for designs requiring high precision at low output voltages where standard bandgap references may lack sufficient accuracy. The 1.25V option requires a minimum input-to-output differential of 1.5V, which differs from other voltage options in the series. Consider the low dropout capability if operating near the lower supply limits.

Voltage Reference Part Context

This part belongs to the LT6657 family of ultra-stable bandgap voltage references manufactured by Analog Devices. It utilizes advanced curvature compensation technology to achieve industry-leading stability. The device is designed for robust performance in harsh environments, featuring comprehensive protection mechanisms against electrical overstress and thermal overload.

Voltage Reference Replacement Considerations

LT6657BHMS8-1.25#PBF offers B-grade specifications with 3ppm/°C drift.

Voltage Reference FAQ

Can the LT6657AHMS8-1.25 operate in shunt mode?

No, the LT6657-1.25 variant functions only in series mode. Other voltage options in the LT6657 family can operate in shunt mode.

What is the minimum supply voltage required for the 1.25V output version?

The minimum supply voltage is 1.5V, meaning VIN must be at least 1.5V higher than VOUT.