Overview
The AD590JF, 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 AD590JF is characterized by its high impedance, constant current regulator, which passes 1 μA/K for supply voltages between 4 V and 30 V. Laser trimming of the chip’s thin-film resistors ensures a calibration accuracy of ±0.5°C at 25°C for the AD590M model. The device's low cost, elimination of support circuitry, and excellent linearity make it an attractive alternative for many temperature measurement situations.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Voltage Range | 4 | 30 | V | |
| Nominal Current Output @ 25°C (298.2K) | 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 CQFP Packages | ±1.5 | °C | ||
| Repeatability | ±0.1 | °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)
- Excellent linearity: ±0.3°C over full range (AD590M)
- Wide power supply range: 4 V to 30 V
- Sensor isolation from case
- Low cost
- High output impedance (>10 MΩ) for excellent rejection of supply voltage drift
Applications
The AD590JF is versatile and can be used in various applications, including:
- Temperature measurement in industrial, automotive, and aerospace environments
- Temperature compensation or correction of discrete components
- Biasing proportional to absolute temperature
- Flow rate measurement
- Level detection of fluids
- Anemometry
- Remote sensing applications due to its high impedance current output and insensitivity to voltage drops over long lines
Q & A
- What is the operating temperature range of the AD590JF?
The AD590JF operates within a temperature range of -55°C to +150°C.
- What is the output current of the AD590JF at 25°C?
The output current at 25°C (298.2 K) is 298.2 μA.
- What is the nominal temperature coefficient of the AD590JF?
The nominal temperature coefficient is 1 μA/K.
- What is the calibration accuracy of the AD590M model?
The AD590M model is laser trimmed to ±0.5°C calibration accuracy at 25°C.
- What is the power supply range for the AD590JF?
The device operates with a power supply range of 4 V to 30 V.
- Why is the AD590JF suitable for remote sensing applications?
The AD590JF is suitable for remote sensing due to its high impedance current output and insensitivity to voltage drops over long lines.
- What types of packages are available for the AD590JF?
The AD590JF is available in 2-lead FLATPACK, 3-pin TO-52, 8-lead SOIC, and die form.
- Does the AD590JF require additional support circuitry?
No, the AD590JF does not require linearization circuitry, precision voltage amplifiers, resistance measuring circuitry, or cold junction compensation.
- How does the AD590JF handle supply voltage drift?
The high output impedance (>10 MΩ) of the AD590JF provides excellent rejection of supply voltage drift.
- Is the AD590JF electrically durable?
Yes, the AD590JF can withstand a forward voltage of up to 44 V and a reverse voltage of 20 V, making it resistant to supply irregularities or pin reversal.
