LM334DT

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LM334DT

+Nomenclature

IC CURRENT SOURCE 3% 8SOIC

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Spécifications

Attribut Valeur
Package Tape & Reel (TR),Cut Tape (CT)
ProductStatus Active
Function Current Source
Accuracy ±3%
Voltage-Input 1V ~ 40V
Current-Output 10mA
OperatingTemperature 0°C ~ 70°C
MountingType Surface Mount
Package/Case 8-SOIC (0.154, 3.90mm Width)

Présentation

Description

The LM334DT is a precision three-terminal adjustable current source from Texas Instruments. It is designed to provide a constant current over a wide range of operating conditions with minimal external components, making it ideal for applications like biasing and sensor excitation. The device operates from a voltage range of 1V to 40V and can supply a current range of 1µA to 10mA. The current is set through an external resistor, offering flexibility in different applications.
The LM334DT is noted for its excellent temperature stability, with its current output typically varying only slightly with temperature changes, thanks to its low temperature coefficient. This feature makes it suitable for temperature-compensated applications. It is commonly used in battery-powered devices, precision current mirrors, and as a constant current source in test equipment.
Packaged in a surface-mount TO-252 package, the LM334DT is compact and suitable for high-density circuit boards. Its simplicity, reliability, and precision make it popular among engineers for various analog applications.

Equivalent

The LM334DT is a 3-terminal adjustable current source. Equivalent products include the LT3092 from Analog Devices, the MAX603 from Maxim Integrated, and the TL431 (though not a direct match, it can be configured for similar applications). Always verify specifications like current range, temperature, and package type to ensure compatibility.

Features

The LM334DT is a precision temperature-dependent current source from Texas Instruments. It is designed to operate as a 3-terminal current source with a wide range of applications. Its key features include:
1. Adjustable Current Output: The device can be configured to provide a constant current output ranging from 1µA to 10mA, adjustable via an external resistor.
2. Wide Input Voltage Range: It operates effectively over a voltage range of 1V to 40V, making it versatile for various applications.
3. Temperature Stability: The LM334DT offers excellent temperature stability, with a low temperature coefficient, typically around 0.33%/°C, ensuring consistent performance across varying temperatures.
4. Low Drift: It has low drift in its output current, providing reliable and precise current sourcing.
5. Compact Package: The device is available in a standard TO-252 package, which is suitable for surface-mount technology (SMT).
Overall, the LM334DT is ideal for applications requiring a precise and stable current source, such as sensor biasing, battery chargers, and analog circuits.

Pinout

The LM334DT is a precision temperature-dependent current source with three pins. It is designed to provide a constant current over a wide temperature range. The pin functions are as follows:
1. R (Resistor): This pin is used to set the output current by connecting an external resistor between this pin and the V- pin. The resistance value determines the current level according to the formula \( I = 67.7 \, \text{mV}/R \).
2. V+: This is the positive supply voltage pin. It is connected to the higher potential in the circuit.
3. V- (Common): This is the common pin and is typically connected to the ground or the lower potential in the circuit.
The LM334DT can be used in a variety of applications, including temperature sensing, current limiting, and precision current generation.

Manufacturer

The LM334DT is manufactured by Texas Instruments, a global semiconductor company headquartered in Dallas, Texas. Texas Instruments, commonly known as TI, designs and produces a wide array of electronic components and integrated circuits for various industries, including consumer electronics, automotive, industrial, and communications. The company is renowned for its innovations in analog and embedded processing technologies, continually advancing the field of electronics with its comprehensive product portfolio.

Application

The LM334DT is a precision temperature-dependent current source designed for various applications. It is commonly used in:
1. Temperature Sensing: Utilized in systems that require temperature-based current control or compensation.
2. Biasing and Current Sources: Provides constant current sources for biasing LEDs, transistors, and other components.
3. Analog Circuit Design: Used in analog circuits where a stable current reference is needed.
4. Battery Chargers: Helps in designing efficient battery charging circuits.
5. Medical Devices: Applied in medical instrumentation for precise current delivery.
Its ability to operate over a wide temperature range makes it versatile for use in both consumer electronics and industrial applications.

Package

The LM334DT is a precision temperature-dependent current source packaged in a TO-252 (DPAK) surface-mount package. This package type is commonly used for its efficient thermal performance and compact size, suitable for automated assembly processes.