Part A
AD8495ARMZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7539 PCS
- Package
- MSOP-8
- Series
- Interface - Sensor and Detector Interfaces
Replacement verdict
Compatible functional replacement candidate
The AD8497ARMZ and AD8495ARMZ are both thermocouple amplifier ICs from the same AD849x family in an identical 8-lead MSOP package, sharing the same supply range, architecture, and pinout. The AD8497ARMZ is calibrated for type K thermocouples with a 0°C to 50°C reference-junction compensation range, while the AD8495ARMZ is calibrated for type K thermocouples with a 0°C to 50°C range and a 5 mV/°C output scaling; the two devices are functionally interchangeable in most designs, with the primary distinction being the calibrated temperature range and output transfer function, so the AD8497ARMZ can serve as a functional replacement for the AD8495ARMZ where the application's sensed temperature range and output scaling are compatible.
Package Type
High match
Pin Configuration
High match
Output Transfer Function
Validation required
Calibrated Temperature Range
Validation required
Parts at a glance
Part B
AD8497ARMZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6084 PCS
- Package
- MSOP-8
- Series
- Interface - Sensor and Detector Interfaces
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 | AD8495ARMZ | Why it matters |
|---|---|---|---|
| Sensor Type | K-type thermocouple | K-type thermocouple | Both are K-type thermocouple amplifiers, so the sensor type is the same; this confirms basic functional compatibility. |
| Temperature Range | 0°C to +50°C (ambient) | 0°C to +50°C (ambient) | The specified ambient operating range determines the environments in which each part can be used reliably. |
| Output Voltage Range | 0 V to 4.5 V (single supply) | 0 V to 4.5 V (single supply) | Output swing must match the downstream ADC or signal chain input range for correct measurement. |
| Supply Voltage (Single) | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Supply range compatibility ensures the part can operate from the same rail as the rest of the system. |
| Supply Current | ~180 µA typical | ~180 µA typical | Quiescent current affects power budget, especially in battery-powered or low-power designs. |
| Package | 8-Lead MSOP (RMZ) | 8-Lead MSOP (RMZ) | Identical package and pinout allow drop-in replacement on the same PCB footprint. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | The industrial temperature range determines suitability for harsh-environment applications. |
| Gain | Fixed gain (5 mV/°C) | Fixed gain (5 mV/°C) | The fixed transfer function (5 mV/°C) defines the output scaling and must match the system's expected signal conditioning. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8495ARMZ | 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 AD8497ARMZ and AD8495ARMZ?
Both are thermocouple amplifiers with cold junction compensation from Analog Devices, packaged in an 8-lead MSOP (RMZ suffix). The AD8495ARMZ is a K-type thermocouple amplifier with a nominal output of 5 mV/°C, while the AD8497ARMZ is a J-type thermocouple amplifier with a nominal output of 5 mV/°C.
What is the key difference between the AD8497ARMZ and AD8495ARMZ?
The primary difference is the thermocouple type they are calibrated for: the AD8495ARMZ is optimized for K-type thermocouples, and the AD8497ARMZ is optimized for J-type thermocouples. Their internal cold junction compensation and transfer characteristics are matched to the respective thermocouple curves.
Can the AD8497ARMZ and AD8495ARMZ be substituted for each other?
No, they are not direct substitutes. Because each device's cold junction compensation and output scaling are tailored to a specific thermocouple type (J vs. K), substituting one for the other in a given design will produce temperature measurement errors unless the thermocouple type and system calibration are changed accordingly.
Do the AD8497ARMZ and AD8495ARMZ have the same package and pinout?
Yes. Both devices are offered in the same 8-lead MSOP package (RMZ suffix) and share the same pin functions, including the thermocouple inputs, reference input, output, and power supply pins. This allows board-level compatibility, but electrical calibration differences remain.
What output voltage do the AD8497ARMZ and AD8495ARMZ provide?
Both devices provide a nominal output sensitivity of 5 mV/°C. The AD8495ARMZ is scaled for K-type thermocouples and the AD8497ARMZ for J-type thermocouples, so the absolute output voltage at a given temperature differs according to the respective thermocouple characteristic.
What supply voltage range do the AD8497ARMZ and AD8495ARMZ require?
Both devices operate from a single supply over the range of 2.7 V to 18 V, or from dual supplies such as ±2.5 V to ±9 V, per the Analog Devices datasheet. The reference pin allows the output to be offset for single-supply operation.
Are the AD8497ARMZ and AD8495ARMZ suitable for the same temperature range?
Both amplifiers support thermocouple measurement over a wide temperature range, but the usable range depends on the thermocouple type and the supply/reference configuration. The AD8495ARMZ is intended for K-type thermocouples and the AD8497ARMZ for J-type thermocouples; consult the respective datasheet for the specified operating temperature range and accuracy limits.