Allicdata Part #: | LM399AH-ND |
Manufacturer Part#: |
LM399AH |
Price: | $ 0.00 |
Product Category: | Integrated Circuits (ICs) |
Manufacturer: | Linear Technology/Analog Devices |
Short Description: | IC VREF SHUNT 6.95V TO46-4 |
More Detail: | Shunt Voltage Reference IC ±0.17% 10mA TO-46-4 |
DataSheet: | LM399AH Datasheet/PDF |
Quantity: | 1000 |
Noise - 0.1Hz to 10Hz: | -- |
Base Part Number: | LM399 |
Supplier Device Package: | TO-46-4 |
Package / Case: | TO-46-4 Metal Can |
Mounting Type: | Through Hole |
Operating Temperature: | 0°C ~ 70°C (TA) |
Current - Cathode: | 500µA |
Current - Supply: | -- |
Voltage - Input: | -- |
Noise - 10Hz to 10kHz: | 7µVrms |
Series: | -- |
Temperature Coefficient: | 1ppm/°C |
Tolerance: | ±0.17% |
Current - Output: | 10mA |
Voltage - Output (Min/Fixed): | 6.95V |
Output Type: | Fixed |
Reference Type: | Shunt |
Part Status: | Active |
Packaging: | Bulk |
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As one of the most versatile and widely used precision voltage reference devices, LM399AH voltage reference is widely used in many applications, especially in PMIC (Power Management Integrated Circuit) related projects. It features exceptional accuracy and stability across the widest range of temperatures. In this article, we’ll take an in-depth look at the application field and working principle of LM399AH voltage reference.
Application Field
LM399AH voltage reference is mainly used in different kinds of power management designs, including switching regulators, power supplies, and voltage-controlled circuits. It can be easily integrated with temporal differencing devices, such as op-amps, comparators, and analog multiple vessels. The LM399AH is not only used for providing the highest accuracy, but also for keeping a stable voltage line for digital circuits, such as ADCs and DACs. In addition, it can also be used for controlling the bias voltage for high-frequency amplifiers.
The LM399AH voltage reference can also be utilized in laboratory and industrial instrumentation, as well as in power control and monitoring systems. Its high accuracy and precision makes it perfect for measuring low, medium and high-voltage across systems and components. The stability of the device, especially across wide temperature ranges, makes it ideal for use in different types of temperature controlled systems. In some cases, the LM399AH is used as an alternative to more expensive and bulky fixed voltage sources.
Working Principle
The LM399AH voltage reference relies on a three-terminal integrated circuit (IC) with a buried band-gap. It consists of a reference transistor that works in active mode, a differential amplifier, and a voltage divider. A specific voltage bias is applied to the reference transistor to ensure stable operation. The reference transistor is protected from thermal noise by two transistors connected in the opposite direction, both of which are turned on depending on the voltage across the reference transistor.
The IC also includes a tunnel diode, a temperature compensated reference diode, and a compensation network. The tunnel diode is a signal generator used to generate a stable voltage from the band-gap reference, while the reference diode is a temperature-compensated reference used to adjust the current drawn from the reference transistors. The compensation network is a combination of both passive and active elements that are used to set the voltage reference level.
The output of the LM399AH is a current source designed to maintain a constant output voltage. The reference voltage is adjustable and can be set to any desired level. For example, a voltage reference of 5V can be adjusted to 6V or 7V in order to be used in different applications. The output is further amplified by the differential amplifier, which provides good temperature stability and noise immunity.
Conclusion
In conclusion, LM399AH is a widely used voltage reference for many different applications, especially in power management designs. It is widely used due to its accuracy, precision and temperature stability, making it an ideal voltage reference for many different applications. The IC is built with a buried band-gap and a three-terminal configuration, which makes it easy to use and integrates in different circuits. The working principle of the device is based on a reference transistor, a differential amplifier, a voltage divider, a tunnel diode and a reference diode.
The specific data is subject to PDF, and the above content is for reference
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