LT1389ACS8-1.25#TR

Voltage Reference Overview

The LT1389ACS8-1.25#TR is a nanopower precision shunt voltage reference manufactured by Analog Devices Inc., operating within the SOIC-8 package. It provides a fixed output voltage of 1.25V with an initial accuracy tolerance of ±0.05%. The device maintains regulation at a low operating current of 800nA and features a maximum temperature coefficient of 10ppm/°C. It exhibits a noise level of 25µVp-p from 0.1Hz to 10Hz and supports a cathode current up to 600 µA. The component operates between 0°C and 70°C, utilizes surface mount installation, and includes dynamic impedance lower than 1Ω.

Voltage Reference Feature Summary

• Utilizes trimmed precision thin-film resistors and improved curvature correction techniques for high stability
• Maintains voltage regulation at ultralow operating currents without requiring output compensation capacitors
• Achieves low temperature cycling hysteresis through advanced design and packaging processes

Voltage Reference Applications

• Portable meters
• Precision regulators
• A/D and D/A converters
• Calibrators

Voltage Reference Procurement Notes

Verify the specific suffix #TR against official documentation to confirm tape-and-reel packaging configuration versus tube variants. Ensure compatibility with RoHS3 standards and EAR99 classification requirements. Cross-reference the manufacturer part number LT1389ACS8-1.25#TR with Analog Devices datasheets to validate pinout integrity and thermal performance specifications before integration into final designs.

Voltage Reference Selection Notes

Select this component when lowest power consumption and guaranteed temperature drift are critical requirements. It serves as a high-performance upgrade alternative to legacy references such as the LM185, LM385, LT1004, LT1034, and LT1634. The device is suitable for applications demanding stable reference voltages from unregulated supplies due to its low dynamic impedance characteristics.

Voltage Reference Part Context

The LT1389 belongs to the Nanopower Precision Shunt Voltage Reference family produced by Linear Technology, now part of Analog Devices Inc. This series is engineered for battery-powered and portable instrumentation where minimal quiescent current is essential. The LT1389 variant specifically offers a 1.25V output in an 8-pin SOIC package, balancing precision with compact form factor constraints.

Voltage Reference Replacement Considerations

Public confirmed substitute part numbers include LT1389ACS8-2.5#PBF, LT1389ACS8-4.096#PBF, and LT1389ACS8-5#PBF.