AD8497CRMZ-R7

Overview

The AD8497CRMZ-R7 is a precision thermocouple amplifier with integrated cold junction compensation, designed for K-type thermocouples. It provides a linear 5 mV/°C output voltage proportional to the measurement junction temperature. The device operates on a single supply ranging from 2.7 V to 36 V or dual supplies of ±2.7 V to ±18 V. It features an initial accuracy of ±1.5°C and an ambient temperature rejection of 0.025°C/°C within its optimized range of 25°C to 100°C. The quiescent current is typically 180 μA, and it is housed in an 8-lead MSOP package.

Feature Summary

• Integrated cold junction compensation eliminates external reference sensor requirements.
• Laser-wafer trimmed for direct interface with K-type thermocouples.
• High impedance differential inputs provide robust overvoltage protection up to VS ± 25 V.
• Reference pin allows offset adjustment for negative temperature measurements.

Applications

• Exhaust gas temperature sensing
• Catalytic converter temperature monitoring
• White goods oven and stovetop temperature control

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm packaging details. Ensure the component matches the required thermal grade and ambient operating range specifications before integration into the design.

Selection Notes

Select this part when using K-type thermocouples in environments where the ambient temperature ranges between 25°C and 100°C. It is suitable for applications requiring high common-mode rejection and rugged input protection without complex signal conditioning circuitry.

Part Context

This component belongs to the AD849x family of precision thermocouple amplifiers. While sharing the same package and core architecture, variants like the AD8494 and AD8495 are optimized for J-type thermocouples and different ambient temperature ranges compared to the K-type optimized AD8497.

Replacement Considerations

AD8497ARMZ-R7