LT1634BCMS8-1.25#PBF

Voltage Reference Overview

The LT1634BCMS8-1.25#PBF is a micropower precision shunt voltage reference manufactured by Analog Devices Inc. It provides a fixed output voltage of 1.25V with an initial accuracy of ±0.05%. The device operates within a commercial temperature range of 0°C to +70°C and features a maximum temperature coefficient of 25ppm/°C. It requires a minimum operating current of 7µA and supports a maximum reverse current of 100mA. The component is housed in an 8-lead plastic MSOP package.

Voltage Reference Feature Summary

• Utilizes trimmed precision thin film resistors for high initial voltage accuracy
• Incorporates improved curvature correction techniques to ensure low temperature drift
• Designed for micropower operation with minimal quiescent current consumption
• Capable of driving capacitive loads without requiring external output compensation capacitors

Voltage Reference Applications

• Portable meters
• Precise regulators
• A/D and D/A converters
• Calibrators

Voltage Reference Procurement Notes

Verify the specific suffix #PBF indicates lead-free finish compliance when sourcing. Confirm the BC grade designation matches the required 25ppm/°C temperature coefficient and 0°C to 70°C operating range. Ensure the MSOP package type aligns with PCB layout constraints. Cross-reference the manufacturer part number against official distributor catalogs to validate authenticity and availability status.

Voltage Reference Selection Notes

Select this component when a stable, low-drift reference is needed for battery-powered or portable instrumentation. The 1.25V output is suitable for applications requiring precise scaling or as a baseline for supervisory circuits. Consider the 7µA minimum operating current for ultra-low power designs. Verify that the 100mA maximum current capability meets load requirements.

Voltage Reference Part Context

This part belongs to the LT1634 family of micropower precision shunt voltage references. It serves as a high-performance upgrade to older references like the LM185/LM385, offering lower power consumption and guaranteed temperature drift characteristics. The family includes various voltage options and packages, with the BC grade specifically targeting commercial temperature ranges.

Voltage Reference Replacement Considerations

LT1634BCS8-1.25#PBF (SOIC-8 package variant)

Voltage Reference FAQ

Does the LT1634BCMS8-1.25#PBF require an output compensation capacitor?

No, the LT1634 does not require an output compensation capacitor but remains stable with capacitive loads.

What is the maximum operating current for the 1.25V version?

The maximum operating current for the 1.25V version is 100mA.