AD8496CRMZ

Overview

The AD8496CRMZ is a precision thermocouple amplifier with integrated cold junction compensation, optimized for J-type thermocouples. It provides a linear output of 5 mV/°C and operates within an ambient temperature range of 25°C to 100°C while covering the full measurement range of the J-type thermocouple. The device features a single supply voltage range from 2.7 V to 36 V and draws a typical quiescent current of 180 μA. Initial accuracy is specified at ±1.5°C under standard test conditions. The component utilizes a high-impedance differential input architecture and includes overvoltage protection capabilities.

Feature Summary

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

Applications

• J-type thermocouple temperature measurement in industrial settings
• Exhaust gas temperature sensing
• Catalytic converter temperature monitoring
• White goods oven and stovetop temperature measurements

Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to confirm package type and environmental rating. Ensure the application environment aligns with the specified 25°C to 100°C ambient operating range for optimal performance. Confirm that the power supply voltage remains within the 2.7 V to 36 V limits during operation.

Selection Notes

Select this component when measuring J-type thermocouples in environments where ambient temperatures exceed standard laboratory ranges. The AD8496 is distinct from the AD8494, which is optimized for lower ambient temperatures. Consider the 5 mV/°C transfer function when designing downstream analog-to-digital conversion stages or setpoint controllers.

Part Context

The AD8496CRMZ belongs to the AD849x family of precision thermocouple amplifiers manufactured by Analog Devices. This series integrates instrumentation amplification and cold junction compensation into a single IC. The AD8496 specifically targets applications requiring accurate temperature measurement in higher ambient heat compared to the AD8494 variant.

Replacement Considerations

The AD8494 serves as a functional alternative for J-type thermocouples but is optimized for a 0°C to 50°C ambient range. For K-type thermocouples, the AD8495 or AD8497 are appropriate substitutes depending on the required ambient temperature range.