LT1634AIS8-1.25#PBF

Voltage Reference Overview

The LT1634AIS8-1.25#PBF is a micropower precision shunt voltage reference manufactured by Analog Devices Inc., housed in an 8-lead plastic SO package. It provides a fixed output of 1.25V with an initial accuracy of ±0.05% and a maximum temperature coefficient of 10ppm/°C across the industrial operating range of –40°C to 85°C. The device operates at a minimum current of 7µA, features low dynamic impedance, and does not require an output compensation capacitor.

Voltage Reference Feature Summary

• Utilizes trimmed precision thin film resistors within a bandgap architecture to achieve high initial voltage accuracy.
• Incorporates improved curvature correction techniques to ensure minimal temperature drift over the full operating range.
• Designed for stability with capacitive loads without requiring external output compensation capacitors.

Voltage Reference Applications

• Reference generation for dual 12-bit DACs
• Single cell Li-Ion battery supervisory circuits
• Micropower A/D converter references

Voltage Reference Procurement Notes

Verify that the specific part number matches the required industrial temperature grade (-40°C to 85°C) and the narrow SO-8 package configuration. Confirm compliance with RoHS directives and lead-free finish specifications as indicated in the ordering information section of the datasheet before finalizing procurement.

Voltage Reference Selection Notes

Select this component when a precise shunt reference is needed for applications requiring low quiescent current and high thermal stability. It serves as a direct upgrade for legacy LM185/LM385 or LT1004/LT1034 designs where lower power consumption and guaranteed temperature drift are critical requirements.

Voltage Reference Part Context

This device belongs to the LT1634 family of micropower precision shunt voltage references. The 'AI' suffix denotes the industrial temperature grade (-40°C to 85°C), while the 'S8' indicates the 8-lead plastic Small Outline package. The '#PBF' suffix specifies the lead-free finish and tube packaging option available from the manufacturer.

Voltage Reference Replacement Considerations

LT1634BCMS8-1.25#PBF (Commercial Temp)

Voltage Reference FAQ

Does the LT1634AIS8-1.25#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 typical low-frequency noise specification for this device?

The peak-to-peak noise is specified as 10µVP-P in the 0.1Hz to 10Hz frequency range.