LTC1798CS8-2.5#PBF

Overview

The Analog Devices LTC1798CS8-2.5#PBF is a micropower bandgap voltage reference housed in an 8-lead plastic SO package. It provides a fixed output voltage of 2.5V with a maximum initial accuracy of 0.15% and a maximum temperature coefficient of 40ppm/°C. The device operates within an input voltage range up to 12.6V, featuring a typical quiescent current of 4µA and a maximum dropout voltage of 200mV at 10mA output current. It can source up to 10mA and sink up to 2mA, ensuring stability without requiring an output bypass capacitor.

Feature Summary

• Combines high accuracy and low drift with very low supply current and small package size
• Features ultralow quiescent current and low dropout voltage ideal for battery-powered equipment
• Uses curvature compensation and trimmed thin-film resistors for performance
• Stable without an output bypass capacitor but supports capacitance up to 1µF

Applications

• Battery-powered systems
• Handheld instruments
• Precision power supplies
• A/D and D/A converters

Procurement Notes

Verify the specific ordering suffix #PBF indicates lead-free finish and tube packaging as documented in official Analog Devices materials. Confirm that the component status aligns with current manufacturer data sheets, noting potential obsolete designations for related tape-and-reel variants. Ensure compliance with RoHS directives and check for any specific handling precautions regarding electrostatic discharge sensitivity during installation.

Selection Notes

Select this part when a fixed 2.5V precision reference is required in space-constrained designs. It is suitable for applications demanding low power consumption due to its micropower characteristics. Consider the 8-lead SO package dimensions for PCB layout constraints. Verify that the load requirements fall within the sourcing and sinking capabilities specified in the electrical characteristics table.

Part Context

This component belongs to the LTC1798 series of micropower low dropout references from Analog Devices. The series includes adjustable and fixed voltage options such as 3V, 4.1V, and 5V. These references utilize internal P-channel pass transistors to provide power dissipation advantages over traditional shunt references, making them efficient for regulating circuits where battery life is critical.

Replacement Considerations

LTC1798CS8-2.5#TRPBF is the tape and reel version of this component.