Overview
The AD590JH is a 2-terminal integrated circuit temperature transducer produced by Analog Devices Inc. This device converts temperature into a proportional current output, making it highly suitable for various temperature measurement applications. It operates within a wide temperature range of -55°C to +150°C and is known for its high accuracy and linearity. The AD590JH is particularly useful in applications where conventional electrical temperature sensors are insufficient due to its compact size, fast response, and the elimination of the need for 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 | ±5.0 | °C | ||
| Absolute Error (Over Rated Performance Temperature Range) | ±10.0 | °C | ||
| Nonlinearity | ±1.5 | °C | ||
| Repeatability | ±0.1 | °C | ||
| Long-Term Drift | ±0.1 | °C/month | ||
| Current Noise | 40 | pA/√Hz | ||
| Power Supply Rejection (4 V ≤ VS ≤ 5 V) | 0.5 | 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 easy to measure absolute temperature without the need for linearization circuitry.
- Wide Temperature Range: Operates from -55°C to +150°C, suitable for a broad range of applications.
- High Accuracy and Linearity: Calibration error as low as ±0.5°C for the AD590M model, and nonlinearity of ±0.3°C over the full range.
- Compact and Versatile Packaging: Available in various packages including 2-lead FLATPACK, 4-lead LFCSP, 3-pin TO-52, 8-lead SOIC, and die form.
- Fast Response and Low Cost: Ideal for applications where size and cost are critical, such as on PC boards or heat sinks.
- High Impedance Current Output: Insensitive to voltage drops over long lines, making it suitable for remote sensing applications.
- No External Circuitry Required: Eliminates the need for precision voltage amplifiers, resistance measuring circuitry, and cold junction compensation).
Applications
- Temperature Measurement: Ideal for fast response surface measurements and accurate temperature readings on PC boards or heat sinks).
- Sensors for Controllers and Meters: Used in custom-made probes and for temperature control applications).
- Thermocouple Cold Junction Compensation: Can be used to compensate for thermocouple cold junction errors).
- Flow Rate Measurement and Level Detection: Suitable for measuring flow rates and detecting fluid levels due to its proportional current output).
- Anemometry and Remote Sensing: Useful in anemometry applications and remote sensing due to its high impedance current output).
Q & A
- What is the operating temperature range of the AD590JH?
The AD590JH operates within a temperature range of -55°C to +150°C).
- What is the nominal current output of the AD590JH at 25°C?
The nominal current output at 25°C (298.2 K) is 298.2 μA).
- What is the calibration error of the AD590JH?
The calibration error for the AD590JH is ±5.0°C at 25°C).
- Does the AD590JH require external linearization circuitry?
No, the AD590JH does not require external linearization circuitry due to its linear current output).
- What are the available packages for the AD590JH?
The AD590JH is available in packages such as 2-lead FLATPACK, 4-lead LFCSP, 3-pin TO-52, 8-lead SOIC, and die form).
- How does the AD590JH handle voltage drops over long lines?
The AD590JH is insensitive to voltage drops over long lines due to its high impedance current output).
- Can the AD590JH be used for remote sensing applications?
Yes, the AD590JH is suitable for remote sensing applications due to its high impedance current output and ability to operate over long distances).
- What is the power supply rejection of the AD590JH?
The power supply rejection of the AD590JH varies from 0.5 μA/V for 4 V ≤ VS ≤ 5 V to 0.1 μA/V for 15 V ≤ VS ≤ 30 V).
- How does the AD590JH perform in terms of long-term drift?
The long-term drift of the AD590JH is ±0.1°C/month).
- What is the typical current noise of the AD590JH?
The typical current noise of the AD590JH is 40 pA/√Hz).
