Overview
The LT3092MPST from Analog Devices Inc. is a highly versatile and programmable 2-terminal current source. This device is designed to provide a stable output current ranging from 0.5mA to 200mA, set by just two external resistors. It does not require input or output capacitors for stability, making it suitable for a wide range of applications, including intrinsically safe environments. The LT3092 features high DC and AC impedance, excellent current regulation, and robust protection mechanisms such as reverse-voltage, reverse-current, and thermal shutdown protection.
Key Specifications
| Parameter | Value |
|---|---|
| Maximum Output Current | 200mA |
| Input Voltage Range | 1.2V to 40V |
| Set Pin Current Accuracy | 1% initial accuracy |
| Line Regulation | Better than 10ppm/V from 1.5V to 40V |
| Package Options | 8-lead TSOT-23, 3-lead SOT-223, 8-lead 3mm × 3mm DFN |
| Operating Temperature Range | -55°C to 125°C |
| Dropout Voltage | 1.2V to 1.4V above OUT pin |
Key Features
- Programmable 2-terminal current source with two external resistors
- No input or output capacitors required for stability
- High DC and AC impedance
- Excellent current regulation: better than 10ppm/V from 1.5V to 40V
- Reverse-voltage, reverse-current, and thermal shutdown protection
- Short-circuit protection
- Low temperature coefficient of the SET pin current
Applications
- Driving sensors and remote supplies
- Precision current limiting for local supplies
- Intrinsically safe applications
- Current source configuration in series with signal lines
Q & A
- What is the maximum output current of the LT3092?
The maximum output current of the LT3092 is 200mA. - What is the input voltage range of the LT3092?
The input voltage range of the LT3092 is from 1.2V to 40V. - Does the LT3092 require external capacitors for stability?
No, the LT3092 does not require input or output capacitors for stability. - What is the accuracy of the SET pin current?
The SET pin current has an initial accuracy of 1%. - What protection mechanisms does the LT3092 have?
The LT3092 features reverse-voltage, reverse-current, short-circuit, and thermal shutdown protection. - In what packages is the LT3092 available?
The LT3092 is available in 8-lead TSOT-23, 3-lead SOT-223, and 8-lead 3mm × 3mm DFN packages. - What is the operating temperature range of the LT3092?
The operating temperature range of the LT3092 is from -55°C to 125°C. - How is the output current set in the LT3092?
The output current is set using two external resistors. - Is the LT3092 suitable for intrinsically safe applications?
Yes, the LT3092 is suitable for intrinsically safe applications due to its high DC and AC impedance. - What are some common applications of the LT3092?
The LT3092 is commonly used for driving sensors, remote supplies, and as a precision current limiter for local supplies.
