Overview
The AD597AHZ from Analog Devices Inc. is a monolithic temperature setpoint controller optimized for use at elevated temperatures, such as those found in oven control applications. This device is designed to cold junction compensate and amplify type K thermocouple inputs, providing an internal signal proportional to temperature. It can operate in various configurations, including as a switched output voltage controller or as a stand-alone voltage output temperature sensor. The AD597AHZ is part of the AD596/AD597 family, which is known for its reliability and precision in temperature measurement and control.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Operating Voltage Range | +5 | - | +30 | V |
| Total Supply Voltage Span | - | - | 36 | V |
| Quiescent Supply Current (+VS) | 160 | - | 300 | µA |
| Quiescent Supply Current (-VS) | 100 | - | 200 | µA |
| Operating Temperature Range | -25 | - | 100 | °C |
| Thermocouple Input Range (Type K) | -200 | - | 1250 | °C |
| Calibration Accuracy at 60°C | - | - | ±4°C | - |
| Ambient Temperature Stability | - | - | 0.05°C/°C | - |
| Alarm Output Current | - | - | 20 mA | - |
Key Features
- Cold junction compensation and amplification of type K thermocouple inputs.
- Configurable as a switched output voltage controller or a stand-alone voltage output temperature sensor.
- Programmable dead-band or switching hysteresis using a single external resistor.
- Thermocouple failure alarm available in H package option, indicating open thermocouple leads.
- Low power dissipation to minimize self-heating errors.
- Flexible alarm output format to drive relays, LEDs, or TTL logic.
- Available in 10-pin metal can, 8-pin plastic mini-DIP, and SOIC packages.
- ROHS compliant and lead-free options available.
Applications
- Oven control and temperature regulation.
- Industrial temperature measurement and control systems.
- High-temperature process control.
- Thermocouple-based temperature sensing in various industrial environments.
- Closed-loop thermocouple signal conditioning systems.
Q & A
- What is the primary function of the AD597AHZ?
The AD597AHZ is a monolithic temperature setpoint controller designed to cold junction compensate and amplify type K thermocouple inputs, providing an internal signal proportional to temperature.
- What are the operating voltage ranges for the AD597AHZ?
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 supply current of the AD597AHZ?
The typical quiescent supply current is 160 µA for +VS and 100 µA for -VS.
- What is the temperature range for type K thermocouple inputs?
The AD597AHZ can accommodate type K thermocouple inputs from -200°C to +1250°C.
- Does the AD597AHZ have a thermocouple failure alarm?
Yes, the H package option includes a thermocouple failure alarm that indicates an open thermocouple lead.
- What are the available package options for the AD597AHZ?
The device is available in 10-pin metal can, 8-pin plastic mini-DIP, and SOIC packages.
- Is the AD597AHZ ROHS compliant?
Yes, the AD597AHZ is ROHS compliant and lead-free.
- What is the calibration accuracy of the AD597AHZ at 60°C?
The calibration accuracy is ±4°C at an ambient temperature of 60°C.
- How does the AD597AHZ minimize self-heating errors?
The device has inherent low power dissipation to minimize self-heating errors.
- What is the maximum alarm output current of the AD597AHZ?
The alarm circuitry can supply up to 20 mA.
