LINEAR TECHNOLOGY LT1389 Data Sheet
Summary
The LT1389 is a nanopower, high-precision shunt voltage reference ideal for applications requiring exceptional accuracy and minimal power consumption. Designed with advanced techniques, it offers an initial voltage accuracy of 0.05% and maintains stable performance down to ultra-low operating currents (as low as 800nA) and superb temperature drift (10ppm/°C max). This module is essential for building precision meters, digital converters, and sophisticated calibrator systems where low power draw and guaranteed thermal stability are critical. Customers can select from multiple fixed voltage outputs (e.g., 1.25V, 2.5V, 4.096V) to meet diverse system requirements.
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LT1389
Nanopower Precision Shunt Voltage Reference
FEATURES DESCRIPTIO
Initial Voltage Accuracy: 0.05% The LT®1389 is a nanopower, precision shunt voltage Low Operating Current: 800n A reference. The bandgap reference uses trimmed preci- Low Drift: 10ppm/°C Max sion thin-film resistors and improved curvature correction Less Than 1Ω Dynamic Impedance techniques to achieve 0.05% initial voltage accuracy with Available in 1.25V, 2.5V, 4.096V and guaranteed 10ppm/°C maximum temperature drift. Volt- age regulation is maintained to an ultralow 800n A operating
5V SO-8 Packages
current. Advances in design, processing and packaging achieve low temperature cycling hysteresis.
APPLICATIO S
The LT1389 does not require an output compensation Portable Meters capacitor, but is stable with capacitive loads. Low dy- Precision Regulators namic impedance makes the LT1389 reference easy to A/D and D/A Converters use from unregulated supplies.
Calibrators RE FE RE NC VO LT AG CH AN GE (m V)
The LT1389 reference can be used as a high performance upgrade to the LM185/LM385, LT1004, LT1034 and LT1634 where lowest power and guaranteed tempera- ture drift are required. , LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
Temperature Drift
2.0 IR = 0.8µA 1.5 VOUT = 1.25V
VOUT 1.25V
LT1389-1.25 –0.5
1389 TA01
TEMPERATURE (°C)
1389 TA02
Page Summary Contents For LINEAR TECHNOLOGY LT1389 Data Sheet
Manual Details
| Brand | Linear |
|---|---|
| Pages | 12 |
| File Size | 208.41 KB |
| Published | June 18, 2026 |
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Frequently Asked Questions
What is the maximum guaranteed temperature drift rate?
It guarantees a low maximum temperature drift of 10ppm/°C.
Does the LT1389 require an output compensation capacitor for stable operation?
No, it does not require an output compensation capacitor, but remains stable when used with capacitive loads.
What is the minimum operating current draw achieved by this voltage reference?
The device achieves a very low operating current of 800nA using a bandgap reference.