LTC1798CS8-2.5#TRPBF

Overview

The LTC1798CS8-2.5#TRPBF is a micropower bandgap voltage reference in an 8-lead plastic SO package, designed for commercial temperature ranges from 0°C to 70°C. It provides a nominal output of 2.5V 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 with input voltages between VOUT + 0.2V and 12.6V.

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 configuration distinct from tube variants like #PBF. Confirm the component meets RoHS compliance standards as indicated in manufacturer documentation. Ensure the part number matches the exact 2.5V fixed output specification within the commercial temperature range. Cross-reference the manufacturer's official lead-free marking guidelines for identification purposes.

Selection Notes

Select this component when low quiescent current and minimal dropout voltage are critical for extending battery life in portable devices. The internal P-channel pass transistor offers lower dropout characteristics compared to PNP-based designs. Consider the stability with or without output capacitors for applications requiring fast settling times or limited PCB space. Verify that the 10mA sourcing capability meets the load requirements of the target circuit.

Part Context

This part belongs to the LTC1798 series of micropower low dropout references manufactured by Analog Devices. The series includes fixed voltage options such as 3V, 4.1V, and 5V, alongside an adjustable variant. All members share the same 8-lead SO package and core architecture utilizing curvature compensation. The series is designed to replace traditional shunt references in precision regulator applications where power efficiency is paramount.

Replacement Considerations

Consult Linear Technology marketing for parts specified with wider operating temperature ranges beyond the commercial grade.