Part A
AD8495CRMZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5995 Stückzahl
- Package
- MSOP-8
- Series
- Sensor- und Detektorschnittstellen
Replacement verdict
Compatible functional replacement candidate
The AD8497ARMZ and AD8495CRMZ are both thermocouple amplifier ICs from the same Analog Devices AD849x family, sharing identical functional architecture, supply requirements, and output characteristics. The AD8497ARMZ is calibrated for type K thermocouples with a 0°C to 500°C range, while the AD8495CRMZ is calibrated for type K thermocouples with a −25°C to +400°C range, making them functionally interchangeable in many designs with appropriate recalibration or acceptance of the shifted temperature window. Designers should validate the temperature range and package thermal performance for their specific application before substituting.
Output Type
High match
Supply Voltage Range
High match
Temperature Range
Validation required
Package Type
Validation required
Parts at a glance
Part B
AD8497ARMZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6084 Stückzahl
- Package
- MSOP-8
- Series
- Sensor- und Detektorschnittstellen
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8497ARMZ | AD8495CRMZ | Why it matters |
|---|---|---|---|
| Amplifier Type / Function | Thermocouple amplifier with cold junction compensation | Thermocouple amplifier with cold junction compensation | Both are thermocouple amplifiers, but the specific variant determines the supported thermocouple type and temperature range. |
| Supported Thermocouple Type | J-type thermocouple | K-type thermocouple | The thermocouple type must match the sensor in the application; J and K types have different Seebeck coefficients and temperature ranges, so they are not directly substitutable. |
| Temperature Range | 0°C to +400°C (J-type range) | 0°C to +1000°C (K-type range) | The usable measurement range differs significantly, affecting suitability for high-temperature applications. |
| Output Voltage Scale | 5 mV/°C | 5 mV/°C | Identical output scaling simplifies ADC interfacing, but the underlying thermocouple type still differs. |
| Supply Voltage Range | 2.7 V to 18 V (single supply) | 2.7 V to 18 V (single supply) | Both support a wide supply range, allowing use in low-voltage and higher-voltage systems. |
| Supply Current | Approximately 180 µA | Approximately 180 µA | Low quiescent current is important for battery-powered and low-power instrumentation. |
| Package | 8-lead MSOP (RMZ) | 8-lead MSOP (RMZ) | Identical package and pinout allow drop-in PCB compatibility, though electrical function differs by thermocouple type. |
| Operating Temperature Range | −40°C to +125°C | −40°C to +125°C | Both parts are rated for industrial temperature environments, supporting robust operation. |
| Cold Junction Compensation | Integrated | Integrated | On-chip cold junction compensation eliminates external circuitry, but the compensation curve is tailored to the specific thermocouple type. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8495CRMZ | AD8497ARMZ |
|---|---|---|
| Part Status | Active | Active |
| Type | Thermocouple Amplifier | Thermocouple Amplifier |
| Input Type | Differential | Differential |
| Output Type | Analog | Analog |
| Supply Current | 250 µA | 250 µA |
| Operating Temperature | 0°C ~ 50°C | 25°C ~ 100°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the AD8497ARMZ and AD8495CRMZ?
The AD8497ARMZ is a thermocouple amplifier with a 5 mV/°C output sensitivity and is specified for operation over the −40°C to +125°C temperature range, supplied in an 8-lead MSOP package. The AD8495CRMZ is a thermocouple amplifier with a 5 mV/°C output sensitivity specified over the 0°C to +50°C temperature range, supplied in an 8-lead SOIC package. Both are pin-compatible thermocouple amplifiers from Analog Devices, but they differ in package type and specified temperature range.
Are the AD8497ARMZ and AD8495CRMZ pin-compatible?
No. The AD8497ARMZ is offered in an 8-lead MSOP package, while the AD8495CRMZ is offered in an 8-lead SOIC package. The pin functions are similar, but the package footprints and land patterns differ, so they are not drop-in replacements on the same PCB without layout changes.
What is the output voltage sensitivity of each device?
Both the AD8497ARMZ and AD8495CRMZ provide a nominal output sensitivity of 5 mV/°C, making them suitable for direct interfacing with ADCs in thermocouple measurement systems.
What supply voltage do the AD8497ARMZ and AD8495CRMZ require?
Both devices operate from a single supply of 2.7 V to 18 V, or from dual supplies of ±2.7 V to ±18 V, per the Analog Devices datasheet.
What is the specified operating temperature range for each part?
The AD8497ARMZ is specified over the −40°C to +125°C temperature range. The AD8495CRMZ is specified over the 0°C to +50°C temperature range. Designs requiring extended temperature operation should select the AD8497ARMZ.
Can the AD8495CRMZ be used as a substitute for the AD8497ARMZ?
Substitution is not recommended without validation. The AD8495CRMZ has a narrower specified temperature range (0°C to +50°C) and a different package (8-lead SOIC) than the AD8497ARMZ (8-lead MSOP, −40°C to +125°C). The PCB footprint and thermal performance must be verified against the target design before substitution.
What type of thermocouple are these amplifiers designed for?
Both the AD8497ARMZ and AD8495CRMZ are designed for use with K-type thermocouples, providing cold-junction compensation and a linearized 5 mV/°C output.
Do both parts include cold-junction compensation?
Yes. Both the AD8497ARMZ and AD8495CRMZ integrate cold-junction compensation circuitry for K-type thermocouples, eliminating the need for external compensation components.