LM334MX

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LM334MX

IC CURRENT SOURCE 3% 8SOIC

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  • 製造商。 部分 #LM334MX
  • 8-SOIC
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規格

Package Tape & Reel (TR)
ProductStatus Obsolete
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 LM334MX is a precision current source and sink device, commonly used in various applications where a stable and adjustable current is required. It is part of the LM334 series, a family of three-terminal adjustable current sources. The LM334MX can operate over a wide range of temperatures and supply voltages, making it versatile for different environments.
Key features include:
- A wide operating current range (1µA to 10mA).
- Low temperature coefficient, typically 0.33%/°C, ensuring minimal variation with temperature changes.
- Adjustable current setting via an external resistor, allowing fine-tuning for specific applications.
- Compact surface-mount package (SOIC-8), suitable for space-constrained designs.
The LM334MX is typically used in applications such as temperature sensors, precision current sources, battery chargers, and bias circuits. Its simplicity and reliability make it an ideal choice for designers needing a consistent and accurate current supply. Additionally, its low-voltage operation and minimal external components requirement further enhance its appeal in cost-sensitive and compact electronic designs.

Features

The LM334MX is a precision three-terminal adjustable current source from Texas Instruments. Key features include:
1. Adjustable Current Output: The device allows for a wide range of output currents, typically adjustable from 1µA to 10mA, making it versatile for various applications.
2. Temperature Stability: It exhibits excellent temperature stability, with a temperature coefficient of about 0.33%/°C, ensuring reliable performance across a broad temperature range.
3. Low Voltage Operation: The LM334MX can operate with a voltage as low as 1V, which is beneficial in low-voltage applications.
4. Wide Operating Temperature Range: It can function effectively in temperatures ranging from -40°C to 85°C, suitable for industrial environments.
5. Simple Circuit Design: The device requires only two external resistors to set the output current, simplifying circuit design and minimizing component count.
6. Compact Package: Available in a small SOT-23 package (denoted by the 'MX' suffix), which is ideal for space-constrained applications.
These features make the LM334MX suitable for a variety of applications, including sensor biasing, battery charging, and LED driving.

Package

The LM334MX is a precision temperature sensor and current source available in a surface-mount SOIC-8 package.

Pinout

The LM334MX is a three-terminal adjustable current source. It typically comes in an 8-pin SOIC (Small Outline Integrated Circuit) package, but only three pins are used for its operation. The key pins and their functions are:
1. R (Pin): This is the resistor pin where an external resistor is connected to set the output current. The current I_out is determined by the formula I_out = 67.7 mV / Rset, where Rset is the resistor connected between R and V- pins.
2. V+ (Pin): This is the positive supply voltage pin. It is connected to the higher potential side of the power supply for the device.
3. V- (Pin): This is the negative supply voltage pin. It is connected to the lower potential side of the power supply and is also commonly used as the ground reference point.
The remaining pins on the 8-pin SOIC package are usually not internally connected or used for additional mechanical stability. The LM334MX is used in applications requiring a constant current source, such as sensor biasing or current regulation circuits.

Manufacturer

The LM334MX is manufactured by Texas Instruments, a global semiconductor company that designs and produces a wide range of electronic products and components. Texas Instruments, commonly known as TI, is well-regarded for its development of analog and embedded processing products, which are utilized in various applications across industries such as automotive, industrial, personal electronics, and communications equipment. The company is headquartered in Dallas, Texas, and has a strong reputation for innovation and quality in the electronics and semiconductor industries.

Application

The LM334MX is a precision three-terminal adjustable current source used in a variety of applications. Its primary use is in current biasing and current regulation, particularly in temperature sensors, battery chargers, and LED drivers. It can also be employed in generating a precision current reference in analog circuits and as a constant current source in photodiode biasing. Its ability to operate over a wide range of temperatures makes it suitable for industrial and consumer electronics.

Equivalent

The LM334MX is a 3-terminal adjustable current source. Equivalent products include the TL431, which is a similar adjustable shunt regulator that can be configured for current-sourcing applications, and the ZXCT1009, which is a high-side current monitor that can be used in similar designs. Additionally, the MAX604 is another adjustable current source that could be considered, depending on the specific application requirements. Always check the datasheets for compatibility with your specific use case.

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