LT1634BIS8-1.25#PBF

Voltage Reference Overview

The LT1634BIS8-1.25#PBF is a micropower precision shunt voltage reference manufactured by Analog Devices Inc., operating within an industrial temperature range of –40°C to 85°C. It provides a fixed output voltage of 1.25V with an initial accuracy of ±0.05% and a maximum temperature coefficient of 25ppm/°C. The device operates at a minimum current of 7µA, features low dynamic impedance below 1Ω, and utilizes trimmed thin-film resistors for stability. It is housed in an 8-lead plastic SO package.

Voltage Reference Feature Summary

• Micropower operation with low quiescent current consumption
• High precision achieved through trimmed thin-film resistors
• Low temperature drift ensuring stable performance across wide ranges
• Capable of driving capacitive loads without external compensation

Voltage Reference Applications

• Single cell Li-Ion battery supervisory circuits
• Portable meters requiring high accuracy
• A/D and D/A converter references
• Precise regulators and calibrators

Voltage Reference Procurement Notes

Verify the specific suffix 'I' confirms the industrial temperature range (–40°C to 85°C) and 'S8' denotes the 8-lead SOIC package. Confirm the '#PBF' designation indicates lead-free finish compliance. Ensure the ordering code matches the required 1.25V output specification before procurement.

Voltage Reference Selection Notes

Select this component when an industrial-grade environment requires a precise shunt reference with minimal power consumption. The 1.25V output is suitable for low-voltage applications where higher noise or drift from other references is unacceptable. Verify that the 8-lead SO package fits the board layout constraints.

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 and guaranteed temperature drift. The family includes various voltage options and packages to suit different design needs.

Voltage Reference Replacement Considerations

LT1634BCS8-1.25#PBF offers commercial temperature range instead of industrial.

Voltage Reference FAQ

Does the LT1634 require an output compensation capacitor?

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

What is the typical low-frequency noise performance?

The peak-to-peak noise is typically 10µV in the 0.1Hz to 10Hz frequency range.