Overview
The AD590LH/883B 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, making it highly suitable for various temperature-sensing applications. The AD590LH/883B operates over a wide temperature range of -55°C to +150°C and can be powered by supply voltages between 4 V and 30 V. It acts as a high impedance, constant current regulator, passing 1 μA/K, which is calibrated to 298.2 μA at 25°C (298.2 K) through laser trimming of the chip’s thin-film resistors.
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 | ±5.0 | °C | ||
| Absolute Error (Over Rated Performance Temperature Range) | ±10 | °C | ||
| Nonlinearity (For TO-52 and FLATPACK Packages) | ±1.5 | °C | ||
| Operating Temperature Range | -55 | 150 | °C |
Key Features
- Linear current output: 1 μA/K, making it highly linear over the full temperature range.
- Wide temperature range: -55°C to +150°C, suitable for a variety of applications.
- Probe-compatible ceramic sensor package and available in multiple package types including 2-lead FLATPACK, 3-pin TO-52, 4-lead LFCSP, 8-lead SOIC, and die form.
- High impedance current output, making it insensitive to voltage drops over long lines and easy to multiplex.
- Laser trimmed to ±0.5°C calibration accuracy for the AD590M model, ensuring high precision).
- Sensor isolation from the case, enhancing reliability and accuracy in measurements).
Applications
- Temperature measurement in various industrial and automotive applications where conventional electrical temperature sensors are used).
- Temperature compensation or correction of discrete components).
- Biasing proportional to absolute temperature).
- Flow rate measurement and level detection of fluids).
- Anemometry and remote sensing applications due to its high impedance current output).
- Hybrid circuits and fast temperature measurements in protected environments, especially in die form).
Q & A
- What is the operating temperature range of the AD590LH/883B?
The AD590LH/883B operates over a temperature range of -55°C to +150°C).
- What is the nominal current output of the AD590LH/883B at 25°C?
The nominal current output at 25°C (298.2 K) is 298.2 μA).
- What is the calibration accuracy of the AD590LH/883B?
The calibration error at 25°C can be as low as ±5.0°C, and with laser trimming, it can be ±0.5°C for the AD590M model).
- What are the available package types for the AD590LH/883B?
The AD590LH/883B is available in 2-lead FLATPACK, 3-pin TO-52, 4-lead LFCSP, 8-lead SOIC, and die form).
- Why is the AD590LH/883B suitable for remote sensing applications?
The device is suitable for remote sensing due to its high impedance current output, which makes it insensitive to voltage drops over long lines).
- Can the AD590LH/883B be used in hybrid circuits?
- What is the power supply range for the AD590LH/883B?
The device can be powered by supply voltages between 4 V and 30 V).
- Does the AD590LH/883B require additional support circuitry?
No, the AD590LH/883B does not require linearization circuitry, precision voltage amplifiers, resistance measuring circuitry, or cold junction compensation).
- How accurate is the temperature measurement of the AD590LH/883B over its full range?
The absolute error over the rated performance temperature range is ±10°C, and with 25°C calibration error set to zero, it can be as low as ±3.0°C).
- Is the AD590LH/883B easy to multiplex?
