LTC1798CS8#PBF

Overview

The Analog Devices LTC1798CS8#PBF is a micropower bandgap voltage reference housed in an 8-lead plastic SO package. It operates within a temperature range of 0°C to 70°C and features a maximum dropout voltage of 200mV at 10mA output current. The device draws a typical quiescent current of 4µA and provides a maximum initial accuracy of 0.15%. It supports a maximum input voltage of 12.6V, with an output capable of sourcing up to 10mA and sinking up to 2mA. The adjustable version utilizes an external resistor divider for voltage setting.

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 remains 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 obsolete status of the tube-packaged LTC1798CS8#PBF against the tape-and-reel alternative LTC1798CS8#TRPBF. Confirm that the specific ordering suffix matches the required packaging format for production integration. Ensure component authenticity through authorized distribution channels given the lifecycle status.

Selection Notes

Select this component for applications requiring low quiescent current and minimal board space. The adjustable output configuration allows flexibility via external resistors. Verify that the operating temperature range meets system requirements, as extended ranges require consultation with manufacturer marketing for non-standard options.

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 the adjustable variant. All members share similar electrical characteristics, including low dropout voltage and high accuracy, packaged in the compact SO-8 form factor.

Replacement Considerations

The tape-and-reel version LTC1798CS8#TRPBF serves as the direct packaging alternative for the obsolete tube version.