Designed for space-critical applications, the LM4040-N precision voltage reference is available in small SC70 and SOT-23 surface-mount package. The advanced design of the LM4040-N eliminates the need for an external stabilizing capacitor while maintaining stability with any capacitive load, thus making the LM4040-N easy to use. Further reducing design effort is the availability of several fixed reverse breakdown voltages: 2.048V, 2.5V, 3V, 4.096V, 5V, 8.192V, and 10V. The minimum operating current increases from 60µA for the 2.5V LM4040-N to 100µA for the 10V LM4040-N. All versions have a maximum operating current of 15mA.
The LM4040-N uses a fuse and Zener-zap reverse breakdown voltage trim during wafer sort to make sure that the prime parts have an accuracy of better than ±0.1% (A grade) at 25°C. Bandgap reference temperature drift curvature correction and low dynamic impedance provide stable reverse breakdown voltage accuracy over a wide range of operating temperatures and currents.
Also available is the LM4041-N with two reverse breakdown voltage versions: adjustable and 1.2V. See the LM4041-N data sheet (SNOS641).
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LM4040-N/-Q1 Precision Micropower Shunt Voltage Reference datasheet (Rev. L) | 29 Jun 2024 | |
| Application brief | Discrete Power Design for C2000™ | PDF | HTML | 15 Aug 2024 | |
| Application brief | Using Voltage Supervisors in High Voltage Applications (Rev. B) | PDF | HTML | 20 Feb 2023 | |
| Functional safety information | LM4040-N-Q1 Functional Safety FIT Rate and Failure Mode Distribution | 18 Dec 2019 | ||
| E-book | Voltage Supervisor and Reset ICs: Tips, Tricks and Basics | 28 Jun 2019 | ||
| Technical article | How to use a voltage reference as a voltage regulator | PDF | HTML | 04 Dec 2018 | |
| Application note | AN-1525 Single Supply Operation of the DAC0800 and DAC0802 (Rev. A) | 22 Apr 2013 | ||
| Application note | Negative Buck Switching Regulator (using LM258x) | 21 Mar 2007 |
For additional terms or required resources, click any title below to view the detail page where available.
This external resistor quick-start calculator tool lets you easily calculate valid external resistor values relative to voltage reference, supply and load-current bounds. With these inputs, you can instantly view the resulting calculations and use the color-coded indications to understand (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| SOT-23 (DBZ) | 3 | Ultra Librarian |
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