Overview
The AD590MF, produced by Analog Devices Inc., is a 2-terminal integrated circuit temperature transducer. This device generates an output current that is proportional to absolute temperature. It operates within a wide power supply range of 4 V to 30 V, making it versatile for various temperature-sensing applications. The AD590MF is calibrated to produce an output current of 298.2 μA at 25°C (298.2 K) through laser trimming of the chip’s thin-film resistors. This component is particularly useful in remote sensing due to its high impedance current output, which minimizes the impact of voltage drops over long lines.
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 | ±0.5 | °C | ||
| Absolute Error (Over Rated Performance Temperature Range) | ±1.7 | °C | ||
| Nonlinearity | ±0.3 | °C | ||
| Repeatability | ±0.1 | °C | ||
| Long-Term Drift | ±0.1 | °C | ||
| Operating Temperature Range | -55 | 150 | °C | |
| Package Type | 2-C Flatpack |
Key Features
- High Impedance Output: The AD590MF has a high output impedance (>10 MΩ), which provides excellent rejection of supply voltage drift and makes it suitable for remote sensing applications.
- Wide Operating Voltage Range: The device operates with supply voltages between 4 V and 30 V, enhancing its versatility in various applications.
- Low Power Requirements: The AD590MF has low power requirements, consuming only 1.5 mW at 5 V and 25°C.
- Electrical Durability: It can withstand a forward voltage of up to 44 V and a reverse voltage of 20 V, ensuring robustness against supply irregularities or pin reversal.
- No External Circuitry Needed: Unlike other temperature sensors, the AD590MF does not require linearization circuitry, precision voltage amplifiers, resistance measuring circuitry, or cold junction compensation.
- Interchangeability: State-of-the-art laser trimming and extensive final testing ensure that AD590MF units are easily interchangeable.
Applications
- Temperature Measurement: The AD590MF is ideal for temperature-sensing applications below 150°C, replacing conventional electrical temperature sensors.
- Remote Sensing: Its high impedance current output makes it suitable for remote sensing applications, allowing operation at hundreds of feet from the receiving circuitry.
- Temperature Compensation: It can be used for temperature compensation or correction of discrete components and biasing proportional to absolute temperature.
- Flow Rate Measurement and Level Detection: The AD590MF can be applied in measuring flow rates and detecting fluid levels.
- Anemometry: It is also used in anemometry applications.
Q & A
- What is the operating voltage range of the AD590MF?
The AD590MF operates within a voltage range of 4 V to 30 V.
- What is the nominal current output of the AD590MF at 25°C?
The nominal current output at 25°C (298.2 K) is 298.2 μA.
- What is the calibration error of the AD590MF at 25°C?
The calibration error at 25°C is ±0.5°C.
- What is the operating temperature range of the AD590MF?
The operating temperature range is from -55°C to 150°C.
- Does the AD590MF require external circuitry for temperature measurement?
No, the AD590MF does not require linearization circuitry, precision voltage amplifiers, resistance measuring circuitry, or cold junction compensation.
- How does the AD590MF handle supply voltage drift?
The high output impedance (>10 MΩ) of the AD590MF provides excellent rejection of supply voltage drift.
- Is the AD590MF suitable for remote sensing applications?
Yes, the AD590MF is particularly useful in remote sensing applications due to its high impedance current output.
- What are some common applications of the AD590MF?
Common applications include temperature measurement, remote sensing, temperature compensation, flow rate measurement, level detection, and anemometry.
- What is the power consumption of the AD590MF at 5 V and 25°C?
The power consumption is 1.5 mW at 5 V and 25°C.
- How durable is the AD590MF against voltage irregularities?
The AD590MF can withstand a forward voltage of up to 44 V and a reverse voltage of 20 V.
