Overview
The AD597AR, produced by Analog Devices Inc., is a monolithic temperature setpoint controller optimized for use in high-temperature environments, such as those found in oven control applications. This device is designed to cold junction compensate and amplify Type K thermocouple signals, providing a temperature-proportional output or a setpoint control function. It is available in various packages, including an 8-pin SOIC (Small Outline Integrated Circuit) package.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Supply Voltage (+VS to –VS) | - | - | 36 | V |
| Operating Temperature Range | -25 | - | 100 | °C |
| Quiescent Current (+VS) | 160 | 300 | - | µA |
| Quiescent Current (–VS) | 100 | 200 | - | µA |
| Temperature Range (Type K Thermocouple) | -200 | - | 1250 | °C |
| Calibration Accuracy at 60°C Ambient | - | - | ±4 | °C |
| Ambient Temperature Stability | - | - | 0.05 | °C/°C |
Key Features
- Cold Junction Compensation and Amplification: The AD597AR compensates and amplifies Type K thermocouple signals, providing a temperature-proportional output.
- Setpoint Control: The device can be configured as a setpoint controller, comparing the thermocouple signal to an external setpoint voltage and providing a low impedance switched output.
- Alarm Function: The H package option includes a thermocouple failure alarm that indicates an open thermocouple lead, capable of sourcing or sinking up to 20 mA of current.
- Flexible Powering: The device can be powered with a single supply from +5 V to +30 V or dual supplies up to a total span of 36 V.
- Low Quiescent Current: Typical quiescent supply current is 160 µA, minimizing self-heating errors.
Applications
- Oven Control: Optimized for use in high-temperature environments such as oven control applications.
- Temperature Measurement and Control Systems: Suitable for use in various temperature measurement and control systems requiring high accuracy and reliability.
- Industrial Automation: Used in industrial automation for precise temperature monitoring and control.
Q & A
- What is the primary function of the AD597AR?
The AD597AR is a thermocouple conditioner and setpoint controller, designed to cold junction compensate and amplify Type K thermocouple signals.
- What are the operating temperature ranges for the AD597AR?
The device operates over an ambient temperature range from -25°C to 100°C, with the Type K thermocouple signal covering -200°C to 1250°C.
- How is the alarm function implemented in the AD597AR?
The alarm function, available in the H package option, detects an open thermocouple lead and can source or sink up to 20 mA of current.
- What are the power supply options for the AD597AR?
The device can be powered with a single supply from +5 V to +30 V or dual supplies up to a total span of 36 V.
- What is the quiescent current of the AD597AR?
The typical quiescent supply current is 160 µA.
- What is the calibration accuracy of the AD597AR at 60°C ambient?
The calibration accuracy is ±4°C at an ambient temperature of 60°C.
- Can the AD597AR be used in industrial automation?
Yes, it is suitable for use in industrial automation for precise temperature monitoring and control.
- What packages are available for the AD597AR?
The AD597AR is available in an 8-pin SOIC package among others.
- How does the AD597AR handle thermocouple failure?
The device includes an alarm circuit that detects and indicates an open thermocouple lead, activating the alarm output.
- What is the ambient temperature stability of the AD597AR?
The ambient temperature stability is 0.05°C/°C from -25°C to 100°C.
