Overview
The AD590MH is a 2-terminal integrated circuit temperature transducer produced by Analog Devices Inc. This device generates an output current that is proportional to absolute temperature. It operates within a supply voltage range of 4V to 30V and acts as a high impedance, constant current regulator, passing 1 μA/K. The AD590MH is calibrated using laser trimming of the chip’s thin-film resistors to achieve a precise output of 298.2 μA at 298.2 K (25°C). Its monolithic integrated circuit design and the elimination of support circuitry make it an economical and efficient solution for various temperature measurement applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Voltage Range | 4 | 30 | V | |
| Output Current @ 25°C (298.2 K) | 298.2 | 298.2 | 298.2 | μA |
| Temperature Coefficient | 1 | 1 | 1 | μA/K |
| Calibration Error @ 25°C | ±1.0 | ±0.5 | °C | |
| Absolute Error (Over Rated Performance Temperature Range) | ±3.0 | ±1.7 | °C | |
| Nonlinearity | ±0.4 | ±0.3 | °C | |
| Temperature Range | -55 | 150 | °C | |
| Package Type | TO-52 | |||
| Number of Pins | 3 |
Key Features
- Linear Current Output: 1 μA/K, providing a direct and linear relationship between output current and temperature.
- Wide Temperature Range: Operates from -55°C to +150°C, making it suitable for a variety of temperature sensing applications.
- Probe-Compatible Ceramic Sensor Package: The TO-52 package is designed to be compatible with probes, enhancing its usability in different environments.
- High Output Impedance: Greater than 10 MΩ, which helps in rejecting supply voltage drift and ensuring stable output.
- Excellent Linearity and Accuracy: Laser-trimmed to achieve calibration accuracy of ±0.5°C at 25°C and nonlinearity of ±0.3°C over the full range.
- Sensor Isolation from Case: Reduces interference and ensures accurate temperature measurements.
- Electrically Durable: Withstands forward voltage up to 44V and reverse voltage up to 20V.
Applications
- Temperature Measurement: Ideal for applications requiring precise temperature sensing below 150°C.
- Temperature Compensation and Correction: Used to compensate or correct the temperature-related drift of discrete components.
- Biasing Proportional to Absolute Temperature: Useful in circuits where biasing needs to be adjusted based on temperature.
- Flow Rate Measurement and Level Detection of Fluids: Can be used in anemometry and fluid level detection applications.
Q & A
- What is the operating voltage range of the AD590MH?
The AD590MH operates within a supply voltage range of 4V to 30V. - What is the output current of the AD590MH at 25°C?
The output current is 298.2 μA at 25°C (298.2 K). - What is the temperature coefficient of the AD590MH?
The temperature coefficient is 1 μA/K. - What is the calibration accuracy of the AD590MH at 25°C?
The calibration accuracy is ±0.5°C at 25°C. - What is the temperature range of the AD590MH?
The temperature range is from -55°C to +150°C. - What type of package does the AD590MH come in?
The AD590MH comes in a 3-pin TO-52 package. - Is the AD590MH electrically durable?
Yes, it withstands forward voltage up to 44V and reverse voltage up to 20V. - What are some common applications of the AD590MH?
Common applications include temperature measurement, temperature compensation, biasing proportional to absolute temperature, flow rate measurement, and level detection of fluids. - Why is the AD590MH preferred over conventional temperature sensors?
The AD590MH is preferred due to its low cost, elimination of support circuitry, and high accuracy. - How does the AD590MH ensure sensor isolation from the case?
The device is designed to ensure sensor isolation from the case, reducing interference and ensuring accurate temperature measurements.
