Overview
The AD595AD, produced by Analog Devices Inc., is a comprehensive instrumentation amplifier and thermocouple cold junction compensator integrated on a single monolithic chip. This device is specifically designed for use with type K (chromel-alumel) thermocouples, offering high precision and reliability in temperature measurement applications. The AD595AD combines an ice point reference with a precalibrated amplifier to produce a high-level output of 10 mV/°C directly from the thermocouple signal. It can operate as a linear amplifier-compensator or as a switched output setpoint controller, making it versatile for various temperature sensing needs.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Supply Voltage (+VS to –VS) | - | - | 36 | V |
| Operating Temperature Range | -55 | - | 125 | °C |
| Calibration Error at +25°C | -3 | - | 3 | °C |
| Stability vs. Temperature | -0.05 | - | 0.05 | °C/°C |
| Gain Error | -1.5 | - | 1.5 | % |
| Nominal Transfer Function | - | 10 | - | mV/°C |
| Quiescent Current (No Load) | - | 160 | 300 | µA |
| Usable Output Current | - | - | ±5 | mA |
| 3 dB Bandwidth | - | 15 | - | kHz |
Key Features
- Precalibrated for Type K Thermocouples: The AD595AD is laser trimmed for type K thermocouple inputs, ensuring high accuracy and precision in temperature measurements.
- Integrated Cold-Junction Compensation: This feature eliminates the need for external compensation circuits, providing accurate readings directly from the thermocouple signal.
- Low Noise Performance: Suitable for applications requiring precise temperature monitoring, the AD595AD offers low noise thermocouple chip performance.
- Signal Conditioning and Amplification: The device includes precision amplifiers to ensure precise temperature readings and easy integration into various systems.
- Thermocouple Failure Alarm: The AD595AD includes a thermocouple failure alarm that indicates if one or both thermocouple leads become open, with a flexible alarm output format including TTL drive capability).
- Flexible Power Supply Options: The device can be powered from a single-ended supply (including +5 V) and can measure temperatures below 0°C with the inclusion of a negative supply).
- Low Power Consumption: The AD595AD operates with a total supply current of typically 160 µA, minimizing self-heating and power consumption).
Applications
- Remote Data Logging: The AD595AD is suitable for remote data logging applications due to its precision and reliability in temperature measurement).
- Vehicle Tracking and Asset Management: It can be used in vehicle tracking and asset management systems where accurate temperature monitoring is crucial).
- Water Quality Control and Energy Efficiency: The device is applicable in water quality control and energy efficiency monitoring, where precise temperature readings are essential).
- Security Surveillance and Industrial Automation: It can be integrated into security surveillance systems and industrial automation environments for reliable temperature sensing).
Q & A
- What type of thermocouple is the AD595AD precalibrated for?
The AD595AD is precalibrated for type K (chromel-alumel) thermocouples).
- What is the nominal transfer function of the AD595AD?
The nominal transfer function of the AD595AD is 10 mV/°C).
- Does the AD595AD have integrated cold-junction compensation?
Yes, the AD595AD includes integrated cold-junction compensation, eliminating the need for external compensation circuits).
- What is the operating temperature range of the AD595AD?
The operating temperature range of the AD595AD is from -55°C to +125°C).
- Can the AD595AD be powered from a single supply?
Yes, the AD595AD can be powered from a single-ended supply, including +5 V, and can measure temperatures below 0°C with the inclusion of a negative supply).
- What is the typical quiescent current of the AD595AD?
The typical quiescent current of the AD595AD is 160 µA).
- Does the AD595AD have a thermocouple failure alarm?
Yes, the AD595AD includes a thermocouple failure alarm that indicates if one or both thermocouple leads become open).
- What is the 3 dB bandwidth of the AD595AD?
The 3 dB bandwidth of the AD595AD is 15 kHz).
- What are some common applications of the AD595AD?
The AD595AD is commonly used in remote data logging, vehicle tracking, asset management, water quality control, energy efficiency monitoring, and security surveillance).
- What is the typical output current capability of the AD595AD?
The AD595AD can deliver up to ±5 mA of output current).
