사양
| 속성 | 가치 |
| Package / Case | Tape & Reel (TR),Cut Tape (CT) |
| Part Status | Active |
| Function | Current Source |
| Accuracy | ±6% |
| Voltage - Input | 1V ~ 40V |
| Current - Output | Adjustable |
| Operating Temperature | 0°C ~ 70°C |
| Mounting Type | Surface Mount |
개요
Description
The LM334MX/NOPB is a precision temperature-dependent current source from Texas Instruments, often used in sensor applications, analog circuits, and precision current setting. It operates over a wide voltage range from 1V to 40V and provides an output current that is directly proportional to absolute temperature (PTAT), making it valuable in temperature compensation and measurement circuits. The device is capable of supplying a current range from 1µA to 10mA. It features a low temperature coefficient of about 0.33%/°C, which ensures stable current output across varying temperatures. The LM334MX/NOPB is housed in a surface-mount TO-252-3 package, allowing for compact design integration. Its simplicity and accuracy make it suitable for precision current applications like biasing bipolar transistors, generating precision references, and as a current source for thermistors or RTDs. The device’s versatility and reliability come from its minimal component requirements and ease of use, making it a popular choice for designers in various electronic applications.
Equivalent
The LM334MX/NOPB is a precision current source. Equivalent products include:
1. LT3092 - A precision, two-terminal current source designed for versatility.
2. MAX634 - A voltage-to-current converter, suitable for similar applications.
3. BCR430U - An adjustable constant current regulator specifically for LED applications.
4. ZXCT1009 - A high-side current monitor suitable for similar uses.
These alternatives may vary slightly in specifications, so always verify compatibility with your specific application requirements.
1. LT3092 - A precision, two-terminal current source designed for versatility.
2. MAX634 - A voltage-to-current converter, suitable for similar applications.
3. BCR430U - An adjustable constant current regulator specifically for LED applications.
4. ZXCT1009 - A high-side current monitor suitable for similar uses.
These alternatives may vary slightly in specifications, so always verify compatibility with your specific application requirements.
Features
The LM334MX/NOPB is a precision three-terminal current source designed for versatile applications. Its key features include:
1. Adjustable Current Output: The device allows for a wide range of current settings, from 1µA to 10mA, using a single external resistor.
2. Temperature Stability: Offers excellent temperature compensation, useful for maintaining consistent performance across varying temperatures.
3. Low Voltage Operation: Can operate with a supply voltage as low as 1V, making it suitable for battery-powered and low-voltage applications.
4. Wide Temperature Range: Functions effectively across a temperature range of -40°C to +85°C.
5. High Precision: Provides accurate and stable current regulation, suitable for precision current applications.
6. Small Package Size: Available in a compact SOIC-8 package, ideal for space-constrained designs.
7. Low Cost: Offers a cost-effective solution for current regulation needs.
These features make the LM334MX/NOPB suitable for a variety of applications, such as biasing transistors, LED driving, and temperature compensation circuits.
1. Adjustable Current Output: The device allows for a wide range of current settings, from 1µA to 10mA, using a single external resistor.
2. Temperature Stability: Offers excellent temperature compensation, useful for maintaining consistent performance across varying temperatures.
3. Low Voltage Operation: Can operate with a supply voltage as low as 1V, making it suitable for battery-powered and low-voltage applications.
4. Wide Temperature Range: Functions effectively across a temperature range of -40°C to +85°C.
5. High Precision: Provides accurate and stable current regulation, suitable for precision current applications.
6. Small Package Size: Available in a compact SOIC-8 package, ideal for space-constrained designs.
7. Low Cost: Offers a cost-effective solution for current regulation needs.
These features make the LM334MX/NOPB suitable for a variety of applications, such as biasing transistors, LED driving, and temperature compensation circuits.
Pinout
The LM334MX/NOPB is a 3-pin adjustable current source IC. The pin count and their functions are as follows:
1. V+ (Positive Voltage Input): This pin is connected to the positive supply voltage. It provides the necessary voltage differential to drive the current through the load.
2. V- (Negative Voltage Input / Adjust): This pin can be used to set the current. By connecting a resistor between the V- pin and V+ pin, you can adjust the current flowing through the device according to the formula I ≈ 67.7 mV / Rset, where Rset is the resistance of the resistor used.
3. I (Current Out): This pin outputs the regulated current. It is connected to the load where the current regulation is desired.
The LM334 is designed for applications requiring a constant current, such as biasing and referencing in various circuits. Its adjustable nature allows for easy customization of the current level as needed.
1. V+ (Positive Voltage Input): This pin is connected to the positive supply voltage. It provides the necessary voltage differential to drive the current through the load.
2. V- (Negative Voltage Input / Adjust): This pin can be used to set the current. By connecting a resistor between the V- pin and V+ pin, you can adjust the current flowing through the device according to the formula I ≈ 67.7 mV / Rset, where Rset is the resistance of the resistor used.
3. I (Current Out): This pin outputs the regulated current. It is connected to the load where the current regulation is desired.
The LM334 is designed for applications requiring a constant current, such as biasing and referencing in various circuits. Its adjustable nature allows for easy customization of the current level as needed.
Manufacturer
The LM334MX/NOPB is manufactured by Texas Instruments (TI). Texas Instruments is a global semiconductor company that designs and manufactures a wide range of electronic components and devices. The company is well-known for its development of analog and embedded processing products, which are used in a variety of applications across industries such as consumer electronics, automotive, industrial, and communications. TI's portfolio includes amplifiers, data converters, power management products, microcontrollers, and other essential components for building electronic circuits and systems. Texas Instruments is recognized for its innovation and contribution to the electronics industry, with a focus on creating efficient, reliable, and high-performance solutions.
Application
The LM334MX/NOPB is a precision three-terminal adjustable current source. Its application areas include:
1. Temperature Sensing: It can be used in temperature sensors where its current output is proportional to absolute temperature.
2. LED Biasing: Useful in LED driving circuits to provide a constant current source.
3. Battery Charging: Employed in battery chargers to maintain a steady current charge rate.
4. Current Limiting: Utilized in circuits needing current regulation for protection.
5. Analog Circuits: Acts as a current reference or constant current regulator in various analog applications.
Overall, the LM334MX/NOPB is versatile in low power applications requiring precise current regulation.
1. Temperature Sensing: It can be used in temperature sensors where its current output is proportional to absolute temperature.
2. LED Biasing: Useful in LED driving circuits to provide a constant current source.
3. Battery Charging: Employed in battery chargers to maintain a steady current charge rate.
4. Current Limiting: Utilized in circuits needing current regulation for protection.
5. Analog Circuits: Acts as a current reference or constant current regulator in various analog applications.
Overall, the LM334MX/NOPB is versatile in low power applications requiring precise current regulation.
Package
The LM334MX/NOPB is a precision current source IC packaged in a SOIC-8 (Small Outline Integrated Circuit) type, which is a surface-mount package.
