Overview
The AD595CDZ, produced by Analog Devices Inc., is a monolithic thermocouple amplifier designed to provide a complete instrumentation amplifier and thermocouple cold junction compensator on a single chip. This device is specifically precalibrated for Type K (chromel-alumel) thermocouple inputs. It combines an ice point reference with a precalibrated amplifier to produce a high-level output directly from the thermocouple signal, making it a versatile component for temperature measurement applications.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Operating Temperature Range | -55 | +125 | °C | |
| Calibration Error at +25°C | ±1°C (C version), ±3°C (A version) | °C | ||
| Stability vs. Temperature | ±0.025°C (C version), ±0.05°C (A version) | °C | ||
| Output Voltage | 10 mV/°C | mV/°C | ||
| Usable Output Current | ±5 | mA | ||
| 3 dB Bandwidth | 15 | kHz | ||
| Quiescent Current (No Load) | 160 | 300 | µA | |
| Supply Voltage Range | +5 V (single supply), ±15 V (dual supply) | V |
Key Features
- Precalibrated for Type K Thermocouples: The AD595CDZ is laser trimmed to match the characteristics of Type K (chromel-alumel) thermocouples, ensuring accurate temperature measurements.
- Cold Junction Compensation: Includes an ice point reference to compensate for cold junction errors, providing a high-level output directly from the thermocouple signal.
- High Gain Amplifier: Combines an instrumentation amplifier with a high gain amplifier to amplify thermocouple signals effectively.
- Thermocouple Failure Alarm: Features an alarm output that indicates if one or both thermocouple leads become open, ensuring robust operation.
- Flexible Powering Options: Can be powered from a single-ended supply (including +5 V) or a dual supply, allowing for measurements below 0°C.
- Low Self-Heating: Operates with a low total supply current to minimize self-heating, ensuring accurate temperature readings.
- Pin-Strapping Options: Allows for use as a linear amplifier-compensator or as a switched output setpoint controller with fixed or remote setpoint control.
Applications
- Temperature Measurement Systems: Ideal for industrial, medical, and scientific applications where precise temperature measurement is critical.
- Process Control: Used in process control systems to monitor and control temperatures in various industrial processes.
- Aerospace and Defense: Suitable for use in aerospace and defense applications due to its high reliability and accuracy.
- Automotive Systems: Can be used in automotive systems for engine temperature monitoring and other temperature-sensitive applications.
Q & A
- What type of thermocouple is the AD595CDZ precalibrated for?
The AD595CDZ is precalibrated for Type K (chromel-alumel) thermocouples.
- What is the output voltage of the AD595CDZ per degree Celsius?
The output voltage is 10 mV/°C.
- Can the AD595CDZ be used with a single supply voltage?
- What is the typical quiescent current of the AD595CDZ?
The typical quiescent current is 160 µA to 300 µA.
- Does the AD595CDZ have a thermocouple failure alarm feature?
- What is the operating temperature range of the AD595CDZ?
The operating temperature range is from 0°C to +50°C for specified performance.
- Can the AD595CDZ be recalibrated for other thermocouple types?
- What are the available package types for the AD595CDZ?
- What is the 3 dB bandwidth of the AD595CDZ?
- What is the maximum usable output current of the AD595CDZ?
