Overview
The LM334Z/NOPB is a 3-terminal adjustable current source produced by Texas Instruments. This device is part of the LM334 series, known for its versatility and wide range of applications. It operates from a minimum input voltage of 1V to a maximum of 40V, making it suitable for various power supply configurations. The LM334Z/NOPB is available in a TO-92 package and is RoHS compliant, ensuring environmental sustainability.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Max Input Voltage | 40 | V |
| Min Input Voltage | 1 | V |
| Max Operating Temperature | 70 | °C |
| Min Operating Temperature | 0 | °C |
| Max Power Dissipation | 400 | mW |
| Forward Current | 10 | mA |
| Accuracy | ±3% | |
| Package Type | TO-92-3 | |
| Number of Pins | 3 | |
| Mount Type | Through Hole | |
| RoHS Compliant | Yes |
Key Features
- Operates from 1V to 40V, providing a wide dynamic voltage range.
- Programmable from 1μA to 10mA with a single external resistor.
- True 2-terminal operation with no separate power supply connections required.
- Excellent current regulation with 0.02%/V.
- Available as a fully specified temperature sensor with ±3% initial accuracy.
- Reverse applied voltages of up to 20V draw only a few dozen microamperes of current, allowing it to act as both a rectifier and current source in AC applications.
Applications
- Bias networks: The LM334Z/NOPB can be used to generate stable current for biasing circuits.
- Surge protection: Its ability to handle reverse voltages makes it suitable for surge protection applications.
- Low power reference: It can serve as a low power current reference in various circuits.
- Ramp generation: The device can be used to generate ramps for timing and control applications.
- LED driver: It can drive LEDs with a stable current, ensuring consistent brightness.
- Temperature sensing: The LM334 series includes devices that can act as true temperature sensors.
Q & A
- What is the operating voltage range of the LM334Z/NOPB?
The LM334Z/NOPB operates from 1V to 40V.
- What is the maximum operating temperature for the LM334Z/NOPB?
The maximum operating temperature is 70°C.
- How is the current set in the LM334Z/NOPB?
The current is set using a single external resistor.
- Is the LM334Z/NOPB RoHS compliant?
Yes, the LM334Z/NOPB is RoHS compliant.
- What is the maximum power dissipation of the LM334Z/NOPB?
The maximum power dissipation is 400 mW.
- Can the LM334Z/NOPB handle reverse voltages?
Yes, it can handle reverse voltages of up to 20V.
- What are some common applications of the LM334Z/NOPB?
Common applications include bias networks, surge protection, low power reference, ramp generation, LED drivers, and temperature sensing.
- What is the accuracy of the current source in the LM334Z/NOPB?
The initial current accuracy is ±3%.
- In what package is the LM334Z/NOPB available?
The LM334Z/NOPB is available in a TO-92 package.
- Does the LM334Z/NOPB require a separate power supply connection?
No, it does not require a separate power supply connection.
