LM334M

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LM334M

IC CURRENT SOURCE 3% 8SOIC

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  • SOIC (D)-8
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規格

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)

概述

Description

The LM334M is a precision three-terminal adjustable current source designed by Texas Instruments. It is used to establish a constant current output, which is particularly useful in applications such as biasing, battery charging, temperature sensing, and LED driving. The device operates over a wide range of input voltages, typically from 1V to 40V, and can provide a current from 1µA to 10mA with a minimal requirement of external components, specifically a single resistor to set the desired current level.
Key features of the LM334M include its low temperature coefficient, making it suitable for precision applications. The current output is directly proportional to the absolute temperature (PTAT), which can be beneficial in temperature compensation circuits. Additionally, its small SOT-23 package makes it suitable for compact designs.
Overall, the LM334M is valued for its simplicity, precision, and versatility in providing a stable current source across a variety of electronic applications.

Features

The LM334M is a precision current source designed for applications requiring a constant current over a wide temperature range. Its features include:
1. Current Range: It can be programmed to deliver a constant current ranging from 1 µA to 10 mA, providing flexibility for various applications.
2. Temperature Compensation: The device offers excellent temperature stability with a temperature coefficient of approximately 0.33%/°C, ensuring consistent performance across varying temperatures.
3. Low Voltage Operation: It operates effectively with a low voltage drop, allowing for a wide range of input voltages.
4. Adjustable Current: The current output is easily set by using a single resistor, making it simple to adjust for specific requirements.
5. Wide Operating Temperature Range: It operates from -55°C to +125°C, making it suitable for use in harsh environments.
6. Compact Package: Available in an 8-pin SOIC package, the LM334M is compact and suitable for space-constrained applications.
These features make the LM334M ideal for use in sensor biasing, battery charging, and current regulation applications.

Package

The LM334M is a three-terminal adjustable current source with a TO-92 package type for through-hole mounting, though it is also available in an SOIC-8 package for surface mounting.

Pinout

The LM334M is a 3-pin adjustable current source IC. The primary function of this device is to provide a constant current over a wide range of voltages. The pins are configured as follows:
1. R Pin (Pin 1): This pin is used to connect an external resistor to set the desired current flowing through the device. The current is proportional to the voltage across this resistor, making it adjustable.
2. V+ Pin (Pin 2): This pin provides the input voltage to the IC. The current flows from this pin through the device and out through the V- pin.
3. V- Pin (Pin 3): This is the output pin where the constant current is delivered. It is connected to the load that requires the current source.
The LM334M is designed for precision current regulation applications, with a typical operating range from 1 µA to 10 mA.

Manufacturer

The LM334M is manufactured by Texas Instruments. Texas Instruments (TI) is a global semiconductor company that designs and manufactures a wide range of electronic components. They are well-known for their analog and embedded processing products, which are used in various applications across different industries, including automotive, industrial, personal electronics, and communications equipment. Texas Instruments focuses on innovation and technology development to provide high-performance solutions for their customers.

Application

The LM334M is a precision three-terminal current source used in various applications such as temperature sensing, battery charging, and biasing in analog circuits. It is commonly employed in environments requiring a stable current, like sensor excitation, and is useful in systems needing programmable current sources for instrumentation and test equipment. Its ability to deliver a constant current over a wide voltage range makes it suitable for driving LEDs and other current-driven devices.

Equivalent

The LM334M is a precision current source from Texas Instruments. Equivalent products include the LT3092 from Analog Devices, the MAX603 from Maxim Integrated, and the NSI50350 from ON Semiconductor. Ensure to verify specifications and pin compatibility when considering replacements.

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