Part A
AD8497ARMZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 6084 個数
- Package
- MSOP-8
- Series
- インターフェース - センサーおよび検出器インターフェース
Replacement verdict
Compatible functional replacement candidate
The AD8497ARMZ and AD8496ARMZ are functionally compatible thermocouple amplifier candidates, sharing the same package, supply range, and output configuration, with the primary distinction being the calibrated thermocouple type. The AD8497ARMZ is calibrated for K-type thermocouples, while the AD8496ARMZ is calibrated for J-type thermocouples, so substitution is viable only when the application's thermocouple type matches the device calibration.
Package Type
High match
Supply Voltage Range
High match
Output Type
High match
Thermocouple Calibration
Validation required
Parts at a glance
Part B
AD8496ARMZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 4651 個数
- Package
- TSSOP-8
- Series
- インターフェース - センサーおよび検出器インターフェース
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 | AD8496ARMZ | Why it matters |
|---|---|---|---|
| Sensor Type | J-Type Thermocouple | K-Type Thermocouple | Determines which thermocouple the amplifier is calibrated for; using the wrong type produces large temperature measurement errors. |
| Output Voltage at 25°C (Ambient) | 5 mV/°C nominal (J-type curve) | 5 mV/°C nominal (K-type curve) | Both provide a 5 mV/°C output, but the internal cold-junction compensation curve differs, so the actual output voltage at a given temperature differs between the two parts. |
| Cold-Junction Compensation Range | Optimized for J-type thermocouple characteristics | Optimized for K-type thermocouple characteristics | The compensation network is matched to the specific thermocouple's Seebeck curve; mismatch causes systematic temperature offset errors. |
| Supply Voltage Range | 2.7 V to 18 V (single supply) | 2.7 V to 18 V (single supply) | Identical supply range means both parts can be used in the same power architecture without redesign. |
| Supply Current | ~180 µA typical | ~180 µA typical | Low, matched quiescent current supports battery-powered and low-power instrumentation in either variant. |
| Package | 8-Lead MSOP (RMZ) | 8-Lead MSOP (RMZ) | Same footprint and pinout allow drop-in board replacement without layout changes. |
| Operating Temperature Range | −40°C to +125°C | −40°C to +125°C | Identical industrial temperature rating ensures equivalent environmental robustness. |
| Output Type | Analog voltage (ratiometric to °C) | Analog voltage (ratiometric to °C) | Both output an analog voltage proportional to temperature, so downstream ADC and signal-chain design is unchanged. |
| Pin Configuration | Standard AD849x pinout (V+, V−, +IN, −IN, REF, OUT, etc.) | Standard AD849x pinout (V+, V−, +IN, −IN, REF, OUT, etc.) | Identical pinout enables direct substitution on an existing PCB. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8497ARMZ | AD8496ARMZ |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Active |
| Type | Thermocouple Amplifier | Thermocouple Amplifier |
| Input Type | Differential | Differential |
| Output Type | Analog | Analog |
| Supply Current | 250 µA | 180 µA |
| Operating Temperature | 25°C ~ 100°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the AD8497ARMZ and AD8496ARMZ?
The AD8497ARMZ and AD8496ARMZ are precision thermocouple amplifiers with cold junction compensation from Analog Devices, supplied in an 8-lead MSOP (RM) package. Both are members of the AD849x family of thermocouple amplifiers with an integrated temperature sensor for cold junction compensation.
What is the key difference between the AD8497ARMZ and AD8496ARMZ?
The AD8496ARMZ is trimmed for use with J-type thermocouples, while the AD8497ARMZ is trimmed for use with K-type thermocouples. The internal gain and offset are set to match the Seebeck coefficient of the respective thermocouple type, so the two devices are not interchangeable without accounting for thermocouple type.
Are the AD8497ARMZ and AD8496ARMZ pin-compatible?
Yes. Both devices are offered in the same 8-lead MSOP package and share the same pinout, so they are pin-compatible. However, pin compatibility does not mean functional interchangeability, because each part is calibrated for a different thermocouple type.
What supply voltage do the AD8497ARMZ and AD8496ARMZ 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 AD849x datasheet. The wide supply range allows operation from low-voltage systems as well as higher-voltage industrial rails.
What output configuration do the AD8497ARMZ and AD8496ARMZ provide?
Both parts provide a single-ended analog voltage output with a nominal scale of 5 mV/°C, referenced to the voltage applied at the reference pin. The output is designed to interface directly with an ADC, and the reference pin allows level shifting of the output.
Can the AD8497ARMZ be used with a J-type thermocouple or the AD8496ARMZ with a K-type thermocouple?
No. The AD8497ARMZ is trimmed for K-type thermocouples and the AD8496ARMZ is trimmed for J-type thermocouples. Using a device with the wrong thermocouple type introduces a gain mismatch and resulting measurement error, so each part should be paired with its intended thermocouple type.
What is the operating temperature range of the AD8497ARMZ and AD8496ARMZ?
Both devices are specified for the industrial temperature range of −40°C to +125°C, as stated in the Analog Devices AD849x datasheet. This range covers typical industrial thermocouple measurement applications.
Do the AD8497ARMZ and AD8496ARMZ include cold junction compensation?
Yes. Both devices integrate a temperature sensor for cold junction compensation, which removes the need for an external cold junction compensation network. This integrated compensation is a primary feature of the AD849x family.