LTC1798CS8-5#PBF

Overview

The Analog Devices LTC1798CS8-5#PBF is a micropower bandgap voltage reference housed in an 8-lead plastic SO package. It provides a fixed 5V output with a maximum initial accuracy of 0.15% and a maximum temperature coefficient of 40ppm/°C. The device features 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, operating within an input voltage range of 5.2V to 12.6V. The component functions reliably across a commercial temperature range of 0°C to 70°C.

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
• Stable without an output bypass capacitor but also stable with capacitance up to 1µF
• Provides power dissipation advantages over shunt references by eliminating idle load current requirements

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 when sourcing this component. Confirm that the manufacturer designation matches Analog Devices Inc. or its predecessor Linear Technology. Ensure the part status aligns with current availability as distribution channels may vary. Cross-reference the datasheet revision history to confirm electrical characteristics match the required design specifications before final procurement.

Selection Notes

Select this component for applications requiring a fixed 5V precision reference with minimal power consumption. The low dropout characteristic allows operation from supplies close to the output voltage, extending battery life. Consider the 8-lead SO package constraints for PCB layout. Verify that the 10mA sourcing capability meets the load requirements. The absence of required output capacitors simplifies designs where board space is limited.

Part Context

This part belongs to the LTC1798 series of micropower low dropout references. The series includes fixed voltage options such as 2.5V, 3V, 4.1V, and 5V, alongside an adjustable variant. All members share similar curvature compensation techniques and trimmed thin-film resistors to achieve high output accuracy. The series is designed to replace traditional shunt references in space-constrained and battery-operated designs.

Replacement Considerations

Public confirmed substitute part numbers include LTC1798CS8-5#TRPBF for tape and reel packaging.