LT1634AIS8-2.5#PBF

Voltage Reference Overview

The LT1634AIS8-2.5#PBF is a micropower precision shunt voltage reference manufactured by Analog Devices Inc., featuring a 2.5V output with ±0.05% initial accuracy and a maximum temperature coefficient of 10ppm/°C. It operates within an industrial temperature range of –40°C to 85°C in an 8-lead plastic SO package, drawing a minimum operating current of 8µA at 10µA reverse current. The device exhibits low dynamic impedance below 1Ω and low-frequency noise of 15µVP-P (0.1Hz to 10Hz), ensuring stable performance without requiring external compensation capacitors.

Voltage Reference Feature Summary

• Utilizes trimmed precision thin film resistors for high initial voltage accuracy
• Incorporates improved curvature correction techniques to minimize temperature drift
• Provides low dynamic impedance for easy integration with unregulated supplies
• Operates stably with capacitive loads without requiring output compensation capacitors

Voltage Reference Applications

• Generating reference and supply voltages for dual 12-bit DACs
• Single cell Li-Ion battery supervisory circuits
• Micropower A/D converter references
• Adjustable output voltage references

Voltage Reference Procurement Notes

Verify the specific suffix #PBF indicates lead-free finish and tube packaging when sourcing. Confirm the AIS8 designation corresponds to the industrial temperature range and SO-8 package type required for your design. Ensure compatibility with existing board layouts for 8-lead narrow small outline packages before finalizing procurement orders.

Voltage Reference Selection Notes

Select this component when precise shunt regulation is needed with minimal power consumption. The industrial grade rating suits environments with significant temperature variations. Consider the low operating current suitable for battery-powered applications where standby power drain must be minimized while maintaining high accuracy standards.

Voltage Reference Part Context

This part belongs to the LT1634 family of micropower precision shunt voltage references. It serves as a high-performance upgrade over older LM185/LM385 and LT1004/LT1034 devices, offering lower power consumption and guaranteed temperature drift specifications across commercial and industrial temperature ranges.

Voltage Reference Replacement Considerations

LT1634ACS8-2.5#PBF offers identical electrical characteristics but is rated for the 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, though it remains stable with capacitive loads.

What is the maximum temperature coefficient for this device?

The maximum temperature coefficient is 10ppm/°C for the LT1634A series parts.