AD595AD

Overview

The AD595AD is a monolithic thermocouple amplifier with cold junction compensation designed for Type K inputs. It integrates an ice point reference and precalibrated amplifier to produce a high-level voltage output directly from the thermocouple signal. The device features laser wafer trimming for calibration accuracy, a built-in thermocouple failure alarm, and flexible pin-strapping options for setpoint control or Celsius transducer operation. It operates on single or dual supplies within a wide voltage range.

Feature Summary

• Integrates instrumentation amplifier and cold junction compensator in a single package
• Laser trimmed for Type K thermocouple characteristics
• Includes thermocouple open-circuit detection alarm
• Supports setpoint controller and standalone Celsius thermometer modes

Applications

• Industrial temperature measurement systems
• Process control loop sensors
• HVAC monitoring equipment
• Thermal management controllers

Procurement Notes

Verify the specific suffix 'AD' corresponds to the TO-116 side-brazed ceramic DIP package when sourcing replacements. Confirm that the component meets the required environmental specifications for the intended operating temperature range. Ensure compatibility with existing board layouts utilizing the 14-pin configuration.

Selection Notes

Select this component for applications requiring direct Type K thermocouple interfacing without external compensation circuitry. Consider the integrated alarm feature for safety-critical monitoring. Evaluate power supply constraints as the device supports both single-ended and dual-supply configurations depending on the required temperature measurement span.

Part Context

This part belongs to the AD594/AD595 family of monolithic thermocouple amplifiers. The AD595 variant is specifically calibrated for Type K (Chromel-Alumel) thermocouples, whereas the AD594 is for Type J. Both share identical functional architectures and packaging options, differing primarily in their internal gain and offset trimming values.

Replacement Considerations

Direct substitutes include the AD595AQ in the Cerdip package or other AD595 variants within the same series. Verify that any replacement maintains the same Type K calibration and package footprint.