Overview
The AD590JH/883B, produced by Analog Devices Inc., is a 2-terminal integrated circuit temperature transducer. This device is designed to produce an output current that is proportional to absolute temperature. It operates with a supply voltage range of 4 V to 30 V and acts as a high impedance, constant current regulator, passing 1 μA/K. The AD590 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). This makes it an attractive solution for various temperature-sensing applications due to its simplicity, accuracy, and robustness.
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 | ±1.0 | ±0.5 | °C | |
| Absolute Error (Over Rated Performance Temperature Range) | ±3.0 | ±1.7 | °C | |
| Nonlinearity | ±0.4 | ±0.3 | °C | |
| Repeatability | ±0.1 | ±0.1 | °C | |
| Long-Term Drift | ±0.1 | ±0.1 | °C | |
| Current Noise | 40 | pA/√Hz | ||
| Power Supply Rejection (4 V ≤ VS ≤ 5 V) | 0.5 | μA/V | ||
| Power Supply Rejection (5 V ≤ VS ≤ 15 V) | 0.2 | μA/V | ||
| Power Supply Rejection (15 V ≤ VS ≤ 30 V) | 0.1 | μA/V | ||
| Case Isolation to Either Lead | 10^10 | Ω | ||
| Effective Shunt Capacitance | 100 | pF | ||
| Electrical Turn-On Time | 20 | μs | ||
| Reverse Bias Leakage Current (Reverse Voltage = 10 V) | 10 | pA |
Key Features
- Linear current output: 1 μA/K, making it highly linear and accurate over a wide temperature range.
- Wide temperature range: −55°C to +150°C, suitable for various environmental conditions.
- Probe-compatible ceramic sensor package and multiple packaging options (2-lead FLATPACK, 4-lead LFCSP, 3-pin TO-52, 8-lead SOIC, and die form).
- High impedance current output, insensitive to voltage drops over long lines, making it ideal for remote sensing applications.
- Sensor isolation from the case, ensuring reliable operation in different setups.
- Excellent linearity: ±0.3°C over the full range (AD590M), and calibration accuracy of ±0.5°C at 25°C.
- No need for linearization circuitry, precision voltage amplifiers, resistance measuring circuitry, or cold junction compensation.
Applications
The AD590JH/883B is particularly useful in a variety of temperature-sensing applications, including:
- Remote sensing: The high impedance current output makes it suitable for use over long distances without significant signal degradation.
- Multiplexing: The current output can be easily switched using CMOS multiplexers or logic gate outputs.
- Industrial automation: For monitoring temperatures in industrial processes where accuracy and reliability are crucial.
- Aerospace and defense: Given its compliance with military standards (883B), it is suitable for use in demanding military and aerospace applications.
- Environmental monitoring: For measuring temperatures in harsh environments due to its wide operating temperature range.
Q & A
- What is the operating voltage range of the AD590JH/883B?
The operating voltage range is from 4 V to 30 V. - What is the nominal current output at 25°C?
The nominal current output at 25°C (298.2 K) is 298.2 μA. - What is the temperature coefficient of the AD590JH/883B?
The nominal temperature coefficient is 1 μA/K. - What is the calibration error at 25°C for the AD590M?
The calibration error at 25°C for the AD590M is ±0.5°C. - What is the absolute error over the rated performance temperature range?
The absolute error over the rated performance temperature range is ±1.7°C for the AD590M. - Is the AD590JH/883B suitable for remote sensing applications?
Yes, it is particularly useful in remote sensing applications due to its high impedance current output. - What are the packaging options available for the AD590?
The AD590 is available in 2-lead FLATPACK, 4-lead LFCSP, 3-pin TO-52, 8-lead SOIC, and die form. - Does the AD590 require additional circuitry for temperature measurement?
No, it does not require linearization circuitry, precision voltage amplifiers, resistance measuring circuitry, or cold junction compensation. - What is the storage temperature range for the AD590JH/883B?
The storage temperature range is from −65°C to +155°C. - Is the AD590JH/883B compliant with military standards?
Yes, the AD590JH/883B is compliant with military standards (883B).
