LTC1798CS8#TRPBF

Overview

The LTC1798CS8#TRPBF is a micropower bandgap voltage reference in an 8-lead plastic SO package. It offers fixed output voltages of 2.5V, 3V, 4.1V, and 5V, alongside an adjustable version. The device features a maximum dropout voltage of 200mV at 10mA output current and a typical quiescent current of 4µA. Initial accuracy is specified at 0.15% maximum, with a temperature coefficient of 40ppm/°C maximum. It can source up to 10mA and sink up to 2mA, operating within an input voltage range of VOUT + 0.2V to 12.6V.

Feature Summary

• Micropower bandgap design combining high accuracy with low supply current
• Capable of sourcing 10mA and sinking 2mA for precision regulator applications
• Stable without external output bypass capacitors, suitable for space-constrained designs

Applications

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

Procurement Notes

Verify the specific suffix (#TRPBF) indicates tape and reel packaging when ordering. Confirm the exact voltage option (e.g., -2.5, -3, -4.1, -5) matches the circuit requirements, as the base model number refers to the adjustable variant. Ensure the 8-SO package dimensions align with the PCB footprint. Check for RoHS compliance status if required by manufacturing standards.

Selection Notes

Select this component for applications requiring low quiescent current to extend battery life. The low dropout characteristic allows operation close to the minimum supply voltage. Consider the 0.15% initial accuracy and 40ppm/°C drift for precision requirements. The ability to sink current makes it suitable for driving loads that may source current back into the reference node.

Part Context

This part belongs to the LTC1798 series of micropower low dropout references from Analog Devices. The series includes fixed voltage options and an adjustable version. It utilizes curvature compensation and trimmed thin-film resistors for performance. The family is designed to offer power dissipation advantages over traditional shunt references by eliminating the need for a current-setting resistor.

Replacement Considerations

LT1798CS8#TRPBF