AD595CDZ

Overview

The AD595CDZ is a monolithic thermocouple amplifier and cold junction compensator designed for K-type thermocouples. It integrates an ice point reference with a precalibrated amplifier to generate a high-level voltage output directly from the thermocouple signal. The device features laser wafer trimming for calibration accuracy and includes built-in cold junction compensation to eliminate external reference requirements.

Feature Summary

• Integrates instrumentation amplifier and cold junction compensator on a single chip
• Provides low impedance voltage output proportional to temperature
• Includes thermocouple failure alarm capability for open circuit detection

Applications

• Industrial temperature measurement systems
• Process control instrumentation
• Thermocouple-based sensing modules

Procurement Notes

Verify the specific suffix 'CDZ' against the manufacturer's current datasheet to confirm package type and RoHS compliance status. Ensure the component matches the required K-type thermocouple specification rather than J-type, which corresponds to the AD594 variant. Confirm operating temperature range alignment with system requirements.

Selection Notes

Select this component when direct amplification of K-type thermocouple signals is required without external compensation circuits. The integrated design simplifies board layout by combining amplification and reference functions. Consider the fixed gain characteristics and output voltage swing limits relative to the target ADC or display interface.

Part Context

This part belongs to the AD594/AD595 family of monolithic thermocouple amplifiers. While the AD594 is calibrated for J-type thermocouples, the AD595 is specifically trimmed for K-type inputs. Both share similar architectures including cold junction compensation and setpoint control capabilities.

Replacement Considerations

The AD594 serves as a functional substitute if J-type thermocouple compatibility is acceptable instead of K-type. Verify pinout compatibility and output scaling differences between variants before substitution.