Overview
The AD590KRZ 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 AD590KRZ operates within a wide temperature range of −55°C to +150°C and is characterized by its high impedance, constant current output of 1 μA/K. The device is calibrated using laser trimming to ensure a precise output of 298.2 μA at 25°C (298.2 K).
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 (AD590J), ±2.5 (AD590K) | °C | ||
| Absolute Error (Over Rated Performance Temperature Range) | ±10 (AD590J), ±5.5 (AD590K) | °C | ||
| Nonlinearity | ±1.5 (TO-52 and FLATPACK), ±1.0 (8-Lead SOIC) | °C |
Key Features
- Linear Current Output: The AD590KRZ provides a linear current output of 1 μA/K, making it highly accurate for temperature measurements.
- Wide Temperature Range: The device operates over a wide temperature range of −55°C to +150°C, making it versatile for various applications.
- Probe-Compatible Packages: Available in several packages including 2-lead FLATPACK, 3-pin TO-52, 4-lead LFCSP, and 8-lead SOIC, which are probe-compatible and suitable for different application needs.
- High Impedance Output: The high impedance current output ensures excellent rejection of supply voltage drift and makes the device suitable for remote sensing applications.
- Low Power Requirements: The device operates with low power requirements, typically 1.5 mW at 5 V and 25°C.
- Electrical Durability: The AD590KRZ can withstand a forward voltage of up to 44 V and a reverse voltage of 20 V, ensuring it is robust against supply irregularities or pin reversal.
Applications
- Temperature Measurement: The AD590KRZ is ideal for any temperature-sensing application below 150°C, replacing conventional electrical temperature sensors with its simplicity and accuracy.
- 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 device is suitable for flow rate measurement, level detection of fluids, and anemometry.
- Remote Sensing: The high impedance current output makes it particularly useful in remote sensing applications, allowing it to operate over long distances without significant voltage drops.
Q & A
- What is the operating temperature range of the AD590KRZ?
The AD590KRZ operates over a temperature range of −55°C to +150°C.
- What is the output current of the AD590KRZ at 25°C?
The output current at 25°C (298.2 K) is 298.2 μA.
- What is the nominal temperature coefficient of the AD590KRZ?
The nominal temperature coefficient is 1 μA/K.
- What are the available packages for the AD590KRZ?
The device is available in 2-lead FLATPACK, 3-pin TO-52, 4-lead LFCSP, and 8-lead SOIC packages.
- Is the AD590KRZ suitable for remote sensing applications?
Yes, the high impedance current output makes it particularly suitable for remote sensing applications.
- What is the power consumption of the AD590KRZ at 5 V and 25°C?
The power consumption is typically 1.5 mW at 5 V and 25°C.
- How accurate is the calibration of the AD590KRZ?
The device is calibrated to ±5.0°C (AD590J) or ±2.5°C (AD590K) at 25°C, and laser trimming ensures high accuracy.
- Can the AD590KRZ withstand supply irregularities?
Yes, it can withstand a forward voltage of up to 44 V and a reverse voltage of 20 V, making it robust against supply irregularities or pin reversal.
- What are some common applications of the AD590KRZ besides temperature measurement?
Besides temperature measurement, it is used for temperature compensation, flow rate measurement, level detection of fluids, and anemometry.
- Is the AD590KRZ easy to integrate into existing systems?
Yes, the device does not require linearization circuitry, precision voltage amplifiers, or cold junction compensation, making it easy to integrate into existing systems.
