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LM334Z
+NomenclatureIC SENSOR TEMP ADJ CUR MODE TO92
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FabricantSemi - conducteurs optiques
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Pièce fabricant #LM334Z
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Fiche technique LM334Z DataSheet
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Package TO-226-3, TO-92-3 (TO-226AA)
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En stock1623
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Spécifications
| Attribut | Valeur |
| Package | Bulk |
| ProductStatus | Obsolete |
| Function | Current Source |
| Accuracy | ±3% |
| Voltage-Input | 1V ~ 40V |
| Current-Output | 10mA |
| OperatingTemperature | 0°C ~ 70°C |
| MountingType | Through Hole |
| Package/Case | TO-226-3, TO-92-3 (TO-226AA) |
Présentation
Description
Key features of the LM334Z include its ability to operate over a wide supply voltage range (1V to 40V), a temperature coefficient that can be programmed to be zero, and a current range typically adjustable from 1 μA to 10 mA. The device is noted for its low temperature drift and high linearity, making it suitable for precision applications.
The LM334Z is available in a TO-92 package, which makes it easy to use in a variety of circuit designs. Its simplicity and reliability make it a popular choice for engineers needing a convenient current source in their projects.
Equivalent
Features
1. Wide Operating Range: It operates over a wide range of 1 µA to 10 mA, making it suitable for diverse applications.
2. High Accuracy: The device provides high accuracy and low temperature coefficient, ensuring consistent performance.
3. Temperature Dependence: It has a built-in temperature compensating circuit, allowing it to maintain stable current over varying temperature conditions.
4. Low Voltage Operation: The LM334Z can operate with a supply voltage as low as 1V, making it efficient for low-power applications.
5. Minimal External Components: It requires only one external resistor to set the output current, simplifying the design process.
6. Compact Package: Available in a TO-92 package, it is suitable for compact and space-constrained designs.
7. Applications: Commonly used in sensor excitation, battery charging, LED driving, and precision current limiting.
These features make the LM334Z an excellent choice for applications demanding a precise and reliable current source.
Pinout
1. Pin 1 (R): This is the resistor pin. By connecting an external resistor between this pin and the V+ pin, you can set the output current. The value of the resistor determines the magnitude of the current sourced by the LM334Z.
2. Pin 2 (V+): This is the positive supply pin. It is connected to the positive side of the voltage supply. The LM334Z operates with a supply voltage of 1V to 40V.
3. Pin 3 (V-): This is the negative supply or output pin. It serves as the current output. The current flows from the V+ pin through the R pin and outputs from the V- pin based on the resistor value connected.
The LM334Z is commonly used in applications requiring a stable current, such as biasing components, sensor excitation, and battery charging circuits. It maintains a constant current regardless of supply voltage changes, making it ideal for precision current regulation tasks.
Manufacturer
Application
1. Temperature Sensing: It can act as a temperature sensor by providing a current proportional to absolute temperature.
2. Biasing: Useful for biasing transistors in amplifier circuits due to its stable current output.
3. LED Drivers: Provides a constant current to drive LEDs, ensuring consistent brightness.
4. Battery Charging: Utilized in constant current battery charging applications.
5. Sensor Excitation: Supplies excitation current for sensors that require a stable current source.
6. Analog Signal Processing: Used in circuits that require precise current regulation for signal processing tasks.