LT1389 - Nanopower Precision Shunt Voltage Reference

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

LT1389 Typical Application
LT1389 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.

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing
RoHS
LT1389ACS8-1.25#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LT1389ACS8-1.25#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes
LT1389BCS8-1.25#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LT1389BCS8-1.25#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes
LT1389BCS8-2.5#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LT1389BCS8-2.5#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes
LT1389BCS8-4.096#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LT1389BCS8-4.096#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes
LT1389BCS8-5#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LT1389BCS8-5#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes


LT1389 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LT1389ACS8-1.25#PBF SO-8 C $6.20 $5.25 Yes
LT1389ACS8-1.25#TRPBF SO-8 C $5.31 Yes
LT1389BCS8-1.25#PBF SO-8 C $3.60 $3.10 Yes
LT1389BCS8-1.25#TRPBF SO-8 C $3.16 Yes
LT1389BCS8-2.5#PBF SO-8 C $3.60 $3.10 Yes
LT1389BCS8-2.5#TRPBF SO-8 C $3.16 Yes
LT1389BCS8-4.096#PBF SO-8 C $3.60 $3.10 Yes
LT1389BCS8-4.096#TRPBF SO-8 C $3.16 Yes
LT1389BCS8-5#PBF SO-8 C $3.60 $3.10 Yes
LT1389BCS8-5#TRPBF SO-8 C $3.16 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

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.

Click here to view our complete list of demo boards

Applications

  • Portable Meters
  • Precision Regulators
  • A/D and D/A Converters
  • Calibrators

Product Notifications

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Design Tools

LTspice

LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

Models for the following parts are available in LTspice:
LT1389-1.25
LT1389-2.5
LT1389-4.096
LT1389-5

Technical Support