Overview
The LM334DT is a 3-terminal adjustable current source produced by STMicroelectronics. It is part of the LM134/LM234/LM334 family, characterized by its ability to operate over a wide dynamic voltage range and its excellent current regulation. The current output is determined by an external resistor, eliminating the need for additional external components. This device is versatile and can be used in various applications, including as a rectifier and current source in AC circuits. Additionally, it serves as an excellent remote-controlled temperature sensor due to its direct proportionality to absolute temperature in Kelvin degrees.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Operating Voltage Range | 1 | - | 40 | V |
| Set Current Range | 1µA | - | 10mA | - |
| Current Regulation | - | 0.02% | - | %/V |
| Initial Accuracy | - | - | ±3% | - |
| Storage Temperature Range | -65 | - | +150 | °C |
| Operating Temperature Range | 0 | - | +70 | °C |
| Power Dissipation | - | - | 400 | mW |
| Reverse Voltage | - | - | 20 | V |
Key Features
- Operates from 1V to 40V.
- Programmable from 1µA to 10mA.
- Excellent current regulation with 0.02%/V.
- ±3% initial accuracy.
- Wide dynamic voltage range of 1V to 10V.
- Reverse voltages of up to 20V draw only a few microamperes, enabling use as a rectifier and in AC applications.
- Voltage on the control pin is directly proportional to absolute temperature (°K), making it suitable for temperature sensing.
Applications
- Adjustable current sources in various electronic circuits.
- Remote-controlled temperature sensors due to its direct proportionality to absolute temperature.
- Rectifiers and current sources in AC applications.
- Circuits requiring high current regulation and stability.
Q & A
- What is the operating voltage range of the LM334DT?
The LM334DT operates from 1V to 40V.
- How is the current output of the LM334DT determined?
The current output is determined by an external resistor without requiring other external components.
- What is the current regulation of the LM334DT?
The LM334DT has an excellent current regulation of 0.02%/V.
- What is the initial accuracy of the LM334DT?
The initial accuracy is ±3%.
- Can the LM334DT be used as a temperature sensor?
Yes, it is an excellent remote-controlled temperature sensor due to its direct proportionality to absolute temperature (°K).
- What is the maximum reverse voltage the LM334DT can handle?
The LM334DT can handle reverse voltages of up to 20V.
- What are the typical applications of the LM334DT?
It is used in adjustable current sources, remote-controlled temperature sensors, rectifiers, and current sources in AC applications.
- What is the operating temperature range of the LM334DT?
The operating temperature range is from 0°C to +70°C.
- What is the power dissipation limit of the LM334DT?
The power dissipation limit is 400 mW.
- Is the LM334DT RoHS compliant?
Yes, the LM334DT is RoHS compliant.
