LT1389 - Nanopower Precision Shunt Voltage Reference
Datasheet 
DocumentationDatasheet
Application Note
- AN75 - Circuitry for Signal Conditioning and Power Conversion
- AN93 - Instrumentation Applications for a Monolithic Oscillator: A Clock for All Reasons
Design Note
Reliability Data
LT Journal
- Avoid Debugging Cycles in Power Management for FPGA, GPU and ASIC Systems
- Jun 1999 4.5µA Li-Ion Battery Protection Circuit
- March 2009 - How to Choose a Voltage Reference
cad_symbol
Features
- Initial Voltage Accuracy: 0.05%
- Low Operating Current: 800nA
- Low Drift: 10ppm/°C Max
- Less Than 1Ohms Dynamic Impedance
- Available in 1.25V, 2.5V, 4.096V and
5V SO-8 Packages
Typical Application
Description
The LT1389 is a nanopower, precision shunt voltage reference. The bandgap reference uses trimmed precision thin-film resistors and improved curvature correction techniques to achieve 0.05% initial voltage accuracy with guaranteed 10ppm/°C maximum temperature drift. Voltage regulation is maintained to an ultralow 800nA operating current. Advances in design, processing and packaging achieve low temperature cycling hysteresis. The LT1389 does not require an output compensation capacitor, but is stable with capacitive loads. Low dynamic impedance makes the LT1389 reference easy to use from unregulated supplies.The LT1389 reference can be used as a high performance upgrade to the LM185/LM385, LT1004, LT1034 and LT1634 where lowest power and guaranteed temperature drift are required.SO-8
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LT1389ACS8-1.25#PBF | SO | 8 | C | $6.20 | $5.25 |
| LT1389ACS8-1.25#TRPBF | SO | 8 | C | $5.31 | |
| LT1389BCS8-1.25#PBF | SO | 8 | C | $3.60 | $3.10 |
| LT1389BCS8-1.25#TRPBF | SO | 8 | C | $3.16 | |
| LT1389BCS8-2.5#PBF | SO | 8 | C | $3.60 | $3.10 |
| LT1389BCS8-2.5#TRPBF | SO | 8 | C | $3.16 | |
| LT1389BCS8-4.096#PBF | SO | 8 | C | $3.60 | $3.10 |
| LT1389BCS8-4.096#TRPBF | SO | 8 | C | $3.16 | |
| LT1389BCS8-5#PBF | SO | 8 | C | $3.60 | $3.10 |
| LT1389BCS8-5#TRPBF | SO | 8 | C | $3.16 | |
| LT1389ACS8-1.25 | SO | 8 | C | $12.40 | $10.50 |
| LT1389ACS8-1.25#TR | SO | 8 | C | $10.62 | |
| LT1389BCS8-1.25 | SO | 8 | C | $7.20 | $6.20 |
| LT1389BCS8-1.25#TR | SO | 8 | C | $6.32 | |
| LT1389BCS8-2.5 | SO | 8 | C | $7.20 | $6.20 |
| LT1389BCS8-2.5#TR | SO | 8 | C | $6.32 | |
| LT1389BCS8-4.096#TR | SO | 8 | C | $6.32 | |
| LT1389BCS8-5 | SO | 8 | C | $7.20 | $6.20 |
| LT1389BCS8-4.096 | SO | 8 | C | $7.20 | $6.20 |
| LT1389BCS8-5#TR | SO | 8 | C | $6.32 |
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.