LT1389ACS8-1.25#TRPBF

Voltage Reference Overview

The LT1389ACS8-1.25#TRPBF is a nanopower precision shunt voltage reference manufactured by Analog Devices Inc., featuring an initial voltage accuracy of 0.05% and a maximum temperature drift of 10ppm/°C. It operates with an ultralow current consumption of 800nA and maintains low dynamic impedance below 1W. The device provides a fixed output voltage of 1.25V, supports a forward current of 20mA, and functions within an operating temperature range of 0°C to 70°C. It utilizes a standard 8-lead plastic SOIC package.

Voltage Reference Feature Summary

• Achieves high precision through trimmed thin-film resistors and curvature correction techniques for stable regulation.
• Maintains voltage stability at ultralow operating currents without requiring external output compensation capacitors.
• Features low dynamic impedance for easy integration with unregulated power supplies.
• Designed with advanced packaging to minimize temperature cycling hysteresis.

Voltage Reference Applications

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

Voltage Reference Procurement Notes

Verify the specific suffix #TRPBF indicates tape-and-reel packaging when sourcing components. Confirm that the ACS8 designation corresponds to the A-grade specifications, including the 0.05% initial accuracy and 10ppm/°C temperature coefficient. Ensure compatibility with the required 8-SOIC footprint during procurement planning.

Voltage Reference Selection Notes

Select this component for applications demanding minimal quiescent current alongside strict temperature stability requirements. It serves as a direct performance upgrade for legacy references like the LM185 or LT1004 where lowest power consumption is critical. Consider board layout precautions to mitigate leakage effects inherent to nanopower devices.

Voltage Reference Part Context

This part belongs to the LT1389 family of nanopower precision shunt voltage references from Analog Devices. The series includes variants with different output voltages (2.5V, 4.096V, 5V) and accuracy grades. The LT1389 utilizes bandgap reference technology optimized for low noise and high long-term stability in compact packages.

Voltage Reference Replacement Considerations

LT1389BCS8-1.25#TRPBF

Voltage Reference FAQ

Does the LT1389 require an output compensation capacitor?

No, the LT1389 does not require an output compensation capacitor but remains stable with capacitive loads.

What is the minimum operating current for the 1.25V version?

The minimum operating current for the 1.25V version is 0.6 mA.