LM334M

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LM334M

+BOM

IC CURRENT SOURCE 3% 8SOIC

  • ManufacturerTexas Instruments

  • Mfr. Part #LM334M

  • Package SOIC (D)-8

  • In Stock6503

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Specifications

Attribute Value
Package Tube
ProductStatus Not For New Designs
Function Current Source
Accuracy ±6%
Voltage-Input 1V ~ 40V
Current-Output Adjustable
OperatingTemperature 0°C ~ 70°C
MountingType Surface Mount
Package/Case 8-SOIC (0.154, 3.90mm Width)

Overview

Description

The LM334M is a versatile, three-terminal current regulator that provides a constant current output, which is independent of supply voltage fluctuations. It is part of the LM334 series, designed to function as a precision current source with a wide range of applications in electronic circuit design. The device operates with a typical output current range from 1 μA to 10 mA, which can be adjusted via an external resistor.
Key features of the LM334M include temperature compensation, ensuring stable performance across a range of operating temperatures, and low quiescent current, making it energy efficient. It is commonly used in applications such as battery chargers, temperature sensors, and bias networks due to its simplicity and reliability. The LM334M is housed in a SOIC-8 package, which provides a compact form factor suitable for space-constrained designs. It is particularly valued for its ability to maintain a constant current over varying loads and supply voltages, making it an essential component for precision current regulation in various electronic applications.

Equivalent

The LM334M is a 3-terminal adjustable current source. Equivalent products include the TI LM334 series, the Analog Devices AD5270, and the Maxim Integrated MAX3867. These products provide similar functionality by delivering a stable current over a wide range of input voltages. It's important to verify the specific requirements, such as current range and voltage ratings, to ensure compatibility with your application. Always refer to the datasheets and manufacturer specifications for precise matching.

Features

The LM334M is a precision three-terminal adjustable current source. Here are its key features:
1. Adjustable Output: It allows for easy adjustment of output current from 1µA to 10mA using a single resistor.
2. Wide Voltage Range: Operates over a wide voltage range from 1V to 40V.
3. Temperature Stability: Offers excellent temperature stability, making it suitable for applications requiring consistent performance across varying temperatures.
4. Low Temperature Coefficient: Typically 0.33%/°C, which helps in maintaining consistent current over temperature variations.
5. High Compliance Voltage: Ensures a broad range of operation in both high and low voltage applications.
6. Minimal External Components: Requires only a single resistor to set the output current, simplifying circuit design.
7. Compact Package: Available in a small surface-mount package, enhancing flexibility for PCB layout.
8. Applications: Ideal for biasing, current limiting, battery charging, and as a precision current reference.
These features make the LM334M a versatile and reliable component for various electronic applications.

Pinout

The LM334M is a 3-pin adjustable current source. Here’s a brief overview of its pin count and function:
1. Pin Count:
- The LM334M comes in an 8-pin SOIC (Small Outline Integrated Circuit) package, but only three of these pins are used for its basic operation as a current source.
2. Pin Functions:
- Pin 1 (R): This is connected to a resistor that sets the output current. The current is approximately 67.7 mV divided by the resistance connected to this pin.
- Pin 3 (V+): This is the positive voltage supply pin. It provides the necessary power for the LM334M to function.
- Pin 2 (V-): This is the current output pin. The current flows from this pin to the load or ground.
The LM334M can be used to set currents ranging from microamperes to milliamperes with high accuracy, making it suitable for biasing, signal conditioning, and other applications requiring a stable current.

Manufacturer

The LM334M is manufactured by Texas Instruments, a global semiconductor company. Texas Instruments (TI) specializes in the design and manufacturing of semiconductors and various integrated circuits, which are essential components in electronic devices. TI's products are used in a variety of applications, including automotive, industrial, personal electronics, communications equipment, and enterprise systems. The company is known for its innovation and extensive range of analog and embedded processing products.

Application

The LM334M is a precision temperature-dependent current source used in various applications. Key areas include temperature sensing and compensation, where it provides a stable current over a wide temperature range. It is often used in biasing circuits for sensors and transistors, ensuring consistent operation despite temperature fluctuations. The LM334M is also employed in battery charging circuits due to its ability to deliver a constant current. Additionally, it's used in LED driving applications for consistent brightness and in analog circuits for current reference and regulation purposes. Its simplicity and reliability make it suitable for low-power, portable, and industrial electronic devices.

Package

The LM334M is a 3-terminal adjustable current source, and it typically comes in a SOIC-8 (Small Outline Integrated Circuit) package. This package type is compact and suitable for surface mount technology.