Overview
The LM234Z-6/NOPB is a 3-terminal adjustable current source produced by Texas Instruments. It is part of the LM134/LM234/LM334 family, known for their wide dynamic voltage range and excellent current regulation. This device is particularly useful in applications requiring precise current control over a broad temperature range.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Operating Voltage Range | 1V to 40V | V |
| Set Current Range | 1μA to 10mA | A |
| Current Regulation | 0.02%/V | %/V |
| Initial Current Accuracy | ±3% | % |
| Temperature Range | −25°C to +100°C | °C |
| Package Type | TO-92 | |
| Power Dissipation | 400 mW | mW |
| ESD Susceptibility | 2000V | V |
Key Features
- Operates from 1V to 40V with excellent current regulation.
- Programmable from 1μA to 10mA using a single external resistor.
- True 2-terminal operation with no separate power supply connections.
- Available as fully specified temperature sensors with ensured initial accuracy.
- Reverse applied voltages of up to 20V draw only a few dozen microamperes of current.
- Zero drift operation achievable with additional components.
Applications
- Bias networks.
- Surge protection.
- Low power reference.
- Ramp generation.
- LED driver.
- Temperature sensing.
Q & A
- What is the operating voltage range of the LM234Z-6/NOPB?
The operating voltage range is from 1V to 40V. - How is the set current programmed in the LM234Z-6/NOPB?
The set current is programmed using a single external resistor. - What is the temperature range for the LM234Z-6/NOPB?
The temperature range is from −25°C to +100°C. - What is the initial current accuracy of the LM234Z-6/NOPB?
The initial current accuracy is ±3%. - Can the LM234Z-6/NOPB operate in reverse voltage conditions?
Yes, it can handle reverse applied voltages of up to 20V, drawing only a few dozen microamperes of current. - How can zero drift operation be achieved with the LM234Z-6/NOPB?
Zero drift operation can be achieved by adding an extra resistor and a diode to the standard configuration. - What are some common applications of the LM234Z-6/NOPB?
Common applications include bias networks, surge protection, low power reference, ramp generation, LED driver, and temperature sensing. - What is the power dissipation limit for the LM234Z-6/NOPB?
The power dissipation limit is 400 mW. - Is the LM234Z-6/NOPB ESD protected?
The device has limited built-in ESD protection and requires careful handling to prevent electrostatic damage. - What package type is the LM234Z-6/NOPB available in?
The device is available in a TO-92 package.
