AD8496CRMZ-R7

Overview

The AD8496CRMZ-R7 is a precision thermocouple amplifier with integrated cold junction compensation, optimized for J-type thermocouples. It operates within an ambient temperature range of 25°C to 100°C and supports full J-type measurement ranges. The device delivers a linear output of 5 mV/°C with an initial accuracy of ±1.5°C at 60°C ambient. It functions on a single supply voltage from 2.7 V to 36 V or dual supplies of ±2.7 V to ±18 V. Quiescent current is typically 180 μA. The component utilizes an 8-lead MSOP package and includes overvoltage protection up to VS ± 25 V.

Feature Summary

• Integrated cold junction compensation optimized for high ambient environments
• Laser-wafer trimmed for precise J-type thermocouple signal conditioning
• High impedance differential inputs with robust overvoltage protection
• Reference pin allows offset adjustment for negative temperature measurement

Applications

• Exhaust gas temperature sensing in automotive systems
• Temperature measurements in ovens and stovetops
• Catalytic converter temperature monitoring
• Universal cold junction compensation in industrial controllers

Procurement Notes

Verify the specific ordering suffix against official Analog Devices documentation to confirm packaging configuration. Ensure compatibility with the required ambient operating range of 25°C to 100°C for optimal performance. Confirm RoHS compliance status through the manufacturer's latest product change notifications before finalizing procurement specifications.

Selection Notes

Select this component when the application requires accurate J-type thermocouple amplification in high-temperature ambient environments exceeding standard room temperature limits. The fixed 5 mV/°C gain simplifies interface design with ADCs. Consider the wide supply voltage range if the system operates on varying power rails. Verify that the thermal resistance characteristics of the MSOP package suit the PCB layout constraints.

Part Context

This part belongs to the AD849x family of precision thermocouple amplifiers. Unlike the AD8494, which is optimized for lower ambient temperatures, the AD8496 variant specifically targets applications where the reference junction experiences elevated heat. It shares architectural similarities with the AD8495 and AD8497 but is calibrated exclusively for J-type thermocouple characteristics.

Replacement Considerations

The AD8494CRMZ serves as a functional alternative for applications requiring J-type amplification in lower ambient temperature ranges (0°C to 50°C). Both parts share identical pinouts and general architecture, allowing for potential board-level substitution if the environmental conditions permit.