LTC1798CS8-4.1#TRPBF

Overview

The LTC1798CS8-4.1#TRPBF is a micropower bandgap voltage reference from Analog Devices, housed in an 8-lead plastic SO package. It provides a nominal output voltage of 4.096V with a maximum initial accuracy of 0.15%. The device operates within a temperature range of 0°C to 70°C and features a maximum dropout voltage of 200mV at 10mA output current. Typical quiescent current is 4µA, while the maximum input voltage is 12.6V. It can source up to 10mA and sink up to 2mA, with a maximum temperature coefficient of 40ppm/°C.

Feature Summary

• Combines high accuracy and low drift with very low supply current and small package size
• Features curvature compensation for low temperature coefficient and trimmed thin-film resistors
• Stable without an output bypass capacitor but supports 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 #TRPBF indicates tape and reel packaging when sourcing this component. Confirm that the manufacturer designation matches Analog Devices Inc. or its predecessor Linear Technology. Ensure the part number corresponds to the fixed 4.096V output variant rather than adjustable or other voltage options within the series.

Selection Notes

Select this component for applications requiring a stable reference voltage with minimal power consumption. The low dropout characteristic allows operation close to the output voltage, extending battery life. Verify that the required operating temperature range aligns with the commercial grade specification of 0°C to 70°C.

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, and 5V, alongside an adjustable version. All variants share similar electrical characteristics regarding quiescent current and dropout performance, differing primarily in their nominal output voltage settings.

Replacement Considerations

Consult manufacturer documentation for direct substitutes. Other parts in the LTC1798 family offer different fixed voltages. Alternative micropower references from other manufacturers may require verification of pin compatibility and electrical parameter alignment.