Overview
The AD590LF, produced by Analog Devices Inc., is a 2-terminal integrated circuit temperature transducer. It generates an output current that is proportional to absolute temperature. This device is designed to operate over a wide temperature range and is particularly useful in applications where conventional electrical temperature sensors are employed. The AD590LF is known for its high impedance current output, making it suitable for remote sensing applications and insensitive to voltage drops over long lines.
Key Specifications
| Parameter | Value |
|---|---|
| Temperature Range | -55°C to +150°C |
| Output Current | 1 μA/K |
| Supply Voltage | 4 V to 30 V |
| Maximum Nonlinearity | ±1.5°C |
| Maximum Absolute Error | ±10°C |
| Maximum Calibration Error at Room Temperature | ±5°C |
| Maximum Repeatability | ±0.1°C |
| Package Type | 2-Ceramic Flatpack |
| Mounting Type | Surface Mount |
Key Features
- High impedance current output, making it suitable for remote sensing applications.
- Insensitive to voltage drops over long lines.
- No need for linearization circuitry, precision voltage amplifiers, resistance measuring circuitry, or cold junction compensation.
- Easily multiplexed using CMOS multiplexers or logic gate outputs.
- Available in various package types, including die form for hybrid circuits and fast temperature measurements in protected environments.
- High quality and reliability ensured through stringent quality and reliability checks in product and process design, and manufacturing.
Applications
- Temperature measurement in various industrial and automotive applications.
- Temperature compensation or correction of discrete components.
- Biasing proportional to absolute temperature.
- Flow rate measurement and level detection of fluids.
- Anemometry and other remote sensing applications.
Q & A
- What is the temperature range of the AD590LF?
The AD590LF operates over a temperature range of -55°C to +150°C.
- What is the output current of the AD590LF?
The output current is 1 μA/K, proportional to absolute temperature.
- What is the supply voltage range for the AD590LF?
The supply voltage range is from 4 V to 30 V.
- What are the typical applications of the AD590LF?
Typical applications include temperature measurement, temperature compensation, biasing proportional to absolute temperature, flow rate measurement, level detection of fluids, and anemometry.
- Why is the AD590LF suitable for remote sensing applications?
The AD590LF is suitable for remote sensing due to its high impedance current output, which makes it insensitive to voltage drops over long lines.
- What are the packaging options available for the AD590LF?
The AD590LF is available in various packages, including 2-Ceramic Flatpack, 3-Lead TO-52, and die form for hybrid circuits.
- Does the AD590LF require additional circuitry for temperature measurement?
No, the AD590LF does not require linearization circuitry, precision voltage amplifiers, resistance measuring circuitry, or cold junction compensation.
- How can the AD590LF be multiplexed?
The AD590LF can be multiplexed using CMOS multiplexers or by switching the supply voltage with a logic gate output.
- What is the mounting type of the AD590LF?
The AD590LF is a surface mount device.
- What is the maximum nonlinearity of the AD590LF?
The maximum nonlinearity is ±1.5°C.
