LT1389 Nanopower Precision Shunt Voltage Reference UFEATURESDESCRIPTIO ■ Initial Voltage Accuracy: 0.05% The LT®1389 is a nanopower, precision shunt voltage ■ Low Operating Current: 800nA 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- 5V SO-8 Packages age regulation is maintained to an ultralow 800nA operating current. Advances in design, processing and packaging U 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 ■ use from unregulated supplies. A/D and D/A Converters ■ Calibrators 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. UTYPICAL APPLICATIOTemperature Drift 2.0 IR = 0.8µA 1.5 VOUT = 1.25V 5V 1.0 4.7M 0.5 VOUT 0 1.25V LT1389-1.25 – 0.5 –1.0 1389 TA01 REFERENCE VOLTAGE CHANGE (mV) –1.5 – 2.0 0 10 20 30 40 50 60 70 TEMPERATURE (°C) 1389 TA02 1
