LT1389ACS8-1.25#PBF

Voltage Reference Overview

The LT1389ACS8-1.25#PBF is a nanopower precision shunt voltage reference with a fixed output of 1.25V and an initial accuracy of ±0.05%. It operates at a low current of 800nA and maintains a maximum temperature drift of 10ppm/°C across the 0°C to 70°C range. The device features less than 1Ω dynamic impedance, eliminating the need for an output compensation capacitor while remaining stable with capacitive loads. Packaged in an 8-lead SOIC.

Voltage Reference Feature Summary

• Utilizes trimmed precision thin-film resistors and curvature correction techniques to achieve high initial voltage accuracy.
• Maintains voltage regulation at ultralow operating currents without requiring an external output compensation capacitor.
• Features low dynamic impedance for easy integration with unregulated power supplies.
• Designed with advanced processing 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 ACS8 indicates the A-grade accuracy class and SOIC-8 package configuration. Confirm that the #PBF designation ensures compliance with lead-free manufacturing standards. Cross-reference the manufacturer part number against official datasheets to ensure correct pinout alignment and thermal characteristics before finalizing procurement orders.

Voltage Reference Selection Notes

Select this component when lowest power consumption and guaranteed temperature drift are critical requirements. It serves as a direct performance upgrade for legacy references like the LM185 or LT1634 where minimal quiescent current is necessary. Ensure board layout includes guard rings around DNC pins to prevent leakage-induced errors due to the nanopower sensitivity.

Voltage Reference Part Context

This component belongs to the LT1389 family of nanopower precision shunt voltage references manufactured by Analog Devices. The series offers various fixed output voltages including 2.5V, 4.096V, and 5V options within the same compact 8-lead SOIC package format.

Voltage Reference Replacement Considerations

LT1389BCS8-1.25#PBF

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 maximum temperature drift specification for the LT1389ACS8-1.25?

The maximum temperature drift is guaranteed at 10ppm/°C over the operating temperature range.