Overview
The LT3092ITS8#TRPBF from Analog Devices Inc. is a programmable 2-terminal current source. This versatile IC allows for the setting of an output current between 0.5mA and 200mA using just two resistors. It is designed to operate without the need for input and output capacitors, making it suitable for a variety of applications, including driving sensors, remote supplies, and serving as a precision current limiter for local supplies. The device features internal protection circuitry, including reverse-battery and reverse-current protection, current limiting, and thermal limiting, ensuring robust and reliable operation.
Key Specifications
| Parameter | Value |
|---|---|
| Maximum Output Current | 200mA |
| Input Voltage Range | 1.2V to 40V |
| Minimum Output Current | 0.5mA |
| Initial Set Pin Current Accuracy | 1% |
| Line Regulation | <0.001%/V (typical) |
| Operating Temperature Range | –40°C to 125°C |
| Package Types | 8-lead TSOT-23, 3-lead SOT-223, 8-lead 3mm × 3mm DFN |
Key Features
- Programmable 2-terminal current source using two resistors
- No input and output capacitors required
- High DC and AC impedance, suitable for intrinsically safe applications
- Reverse-battery and reverse-current protection, current limiting, and thermal limiting
- Low temperature coefficient and high accuracy (1% initial set pin current accuracy)
- Stable operation in a wide input voltage range (1.2V to 40V)
Applications
- Driving sensors and remote supplies
- Precision current limiter for local supplies
- Intrinsically safe applications due to high DC and AC impedance
- Automotive applications (with specific automotive-grade models)
Q & A
- What is the maximum output current of the LT3092?
The maximum output current of the LT3092 is 200mA.
- What is the minimum output current that can be set for the LT3092?
The minimum output current that can be set for the LT3092 is 0.5mA.
- Does the LT3092 require input and output capacitors?
No, the LT3092 does not require input and output capacitors.
- What is the input voltage range for the LT3092?
The input voltage range for the LT3092 is 1.2V to 40V.
- What types of protection does the LT3092 have?
The LT3092 has reverse-battery and reverse-current protection, current limiting, and thermal limiting.
- What is the operating temperature range for the LT3092?
The operating temperature range for the LT3092 is –40°C to 125°C.
- 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.
- Is the LT3092 suitable for automotive applications?
Yes, specific models of the LT3092 are available for automotive applications, designated with a #W suffix.
- How is the output current of the LT3092 programmed?
The output current of the LT3092 is programmed using two resistors, which set the current based on the resistor ratio relative to a 10μA current source.
- What is the line regulation of the LT3092?
The line regulation of the LT3092 is better than 10ppm/V from 1.5V to 40V, and typically <0.001%/V).
