Overview
The AD590KR-REEL, produced by Analog Devices Inc., is a 2-terminal integrated circuit temperature transducer designed to produce an output current proportional to absolute temperature. This device operates within a wide temperature range of −55°C to +150°C and is suitable for various temperature-sensing applications where conventional electrical temperature sensors are used. The AD590KR-REEL is calibrated to provide a nominal current output of 298.2 μA at 25°C (298.2 K) and has a temperature coefficient of 1 μA/K. Its high impedance current output and wide power supply range (4 V to 30 V) make it an attractive alternative for many temperature measurement situations, eliminating the need for additional support circuitry such as linearization circuitry, precision voltage amplifiers, and cold junction compensation.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Voltage Range | 4 | 30 | V | |
| Nominal Current Output @ 25°C (298.2 K) | 298.2 | 298.2 | μA | |
| Nominal Temperature Coefficient | 1 | 1 | μA/K | |
| Calibration Error @ 25°C | ±2.5 | °C | ||
| Absolute Error (Over Rated Performance Temperature Range) | ±5.5 | °C | ||
| Nonlinearity | ±0.8 | °C | ||
| Repeatability | ±0.1 | °C | ||
| Forward Voltage (E+ or E–) | 44 | V | ||
| Reverse Voltage (E+ to E–) | −20 | V | ||
| Rated Performance Temperature Range | −55 | +150 | °C |
Key Features
- Linear current output: 1 μA/K
- Wide temperature range: −55°C to +150°C
- Probe-compatible ceramic sensor package
- 2-terminal device: voltage in/current out
- Laser trimmed to ±0.5°C calibration accuracy (AD590M models)
- Excellent linearity: ±0.3°C over full range (AD590M models)
- Wide power supply range: 4 V to 30 V
- Sensor isolation from case
- Low cost and elimination of support circuitry
- Electrically durable: withstands forward voltage up to 44 V and reverse voltage up to 20 V
- Suitable for remote sensing applications with high impedance current output
Applications
- Temperature measurement in various industrial and automotive applications
- Temperature compensation or correction of discrete components
- Biasing proportional to absolute temperature
- Flow rate measurement
- Level detection of fluids
- Anemometry
- Hybrid circuits and fast temperature measurements in protected environments
Q & A
- What is the operating temperature range of the AD590KR-REEL? The AD590KR-REEL operates within a temperature range of −55°C to +150°C.
- What is the nominal current output of the AD590KR-REEL at 25°C? The nominal current output is 298.2 μA at 25°C (298.2 K).
- What is the temperature coefficient of the AD590KR-REEL? The temperature coefficient is 1 μA/K.
- What is the power supply range for the AD590KR-REEL? The device operates with a power supply range of 4 V to 30 V.
- Does the AD590KR-REEL require additional support circuitry? No, the AD590KR-REEL eliminates the need for linearization circuitry, precision voltage amplifiers, resistance measuring circuitry, and cold junction compensation.
- What are the key features of the AD590KR-REEL? Key features include linear current output, wide temperature range, probe-compatible ceramic sensor package, and high impedance current output.
- Is the AD590KR-REEL suitable for remote sensing applications? Yes, the device is particularly useful in remote sensing applications due to its high impedance current output and insensitivity to voltage drops over long lines.
- What are some common applications of the AD590KR-REEL? Applications include temperature measurement, temperature compensation, biasing proportional to absolute temperature, flow rate measurement, level detection of fluids, and anemometry.
- How durable is the AD590KR-REEL electrically? The device is electrically durable, withstanding forward voltages up to 44 V and reverse voltages up to 20 V.
- What is the calibration accuracy of the AD590KR-REEL? The calibration accuracy is ±2.5°C for the AD590K models, with some models (AD590M) offering ±0.5°C accuracy.
