Part A
AD8495ARMZ
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7539 ПКС
- Package
- MSOP-8
- Series
- Интерфейс - интерфейсы датчиков и детекторов
Replacement verdict
Compatible functional replacement candidate
The AD8495ARMZ and AD8496ARMZ are functionally interchangeable thermocouple amplifier candidates, sharing the same package, supply range, and output configuration, with the primary distinction being the factory-set gain and corresponding thermocouple type. The AD8496ARMZ offers higher gain for type J thermocouples, while the AD8495ARMZ is calibrated for type K. Designers should confirm thermocouple type and gain requirements before substitution.
Package Type
High match
Output Type
High match
Supply Voltage Range
High match
Gain and Thermocouple Calibration
Validation required
Parts at a glance
Part B
AD8496ARMZ
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4651 ПКС
- Package
- TSSOP-8
- Series
- Интерфейс - интерфейсы датчиков и детекторов
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8495ARMZ | AD8496ARMZ | Why it matters |
|---|---|---|---|
| Input Type (Thermocouple) | Type K thermocouple | Type J thermocouple | Determines which thermocouple the amplifier is calibrated for; Type K and Type J have different Seebeck coefficients and temperature ranges, so they are not directly interchangeable. |
| Output Voltage at +25°C (with 5 mV/°C scaling) | 5 mV/°C (Type K calibrated) | 5 mV/°C (Type J calibrated) | Both provide a 5 mV/°C output, but the internal cold-junction compensation curve differs, so the output voltage for a given ambient temperature differs between the two parts. |
| Cold Junction Compensation Curve | Optimized for Type K thermocouple response | Optimized for Type J thermocouple response | The internal CJC network matches the thermocouple's temperature-to-voltage characteristic; using the wrong variant introduces significant measurement error. |
| 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 designs equally for both variants. |
| Package | 8-lead MSOP (RMZ) | 8-lead MSOP (RMZ) | Same footprint and pinout allow drop-in PCB compatibility between the two parts. |
| Operating Temperature Range | −40°C to +125°C | −40°C to +125°C | Identical industrial temperature range means both are suitable for the same environmental conditions. |
| Output Voltage Range | Rail-to-rail output (0 V to VS − 0.1 V) | Rail-to-rail output (0 V to VS − 0.1 V) | Matched output swing ensures the same ADC interface and signal conditioning can be reused. |
| Gain | Fixed gain of 122.4 V/V | Fixed gain of 122.4 V/V | Identical fixed gain yields the same 5 mV/°C transfer function, simplifying signal-chain design reuse. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8495ARMZ | 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 | 0°C ~ 50°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What is the primary functional difference between the AD8495ARMZ and the AD8496ARMZ?
Both are thermocouple amplifiers with cold junction compensation, but they are calibrated for different thermocouple types. The AD8495ARMZ is calibrated for a K-type thermocouple (5 mV/°C nominal output slope), while the AD8496ARMZ is calibrated for a J-type thermocouple (5 mV/°C nominal output slope with J-type cold junction compensation).
Are the AD8495ARMZ and AD8496ARMZ pin-compatible?
Yes. Both devices are offered in the same 8-lead MSOP (RM) package and share the same pinout, so they are pin-compatible when the correct thermocouple type and associated cold junction compensation are accounted for in the design.
What is the output voltage slope of each device?
Both the AD8495ARMZ and AD8496ARMZ provide a nominal output slope of 5 mV/°C, allowing the output voltage to be read directly as a temperature-equivalent signal when referenced to the appropriate offset.
What supply voltage range do the AD8495ARMZ and AD8496ARMZ support?
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 manufacturer datasheet.
Can the AD8495ARMZ and AD8496ARMZ be used interchangeably in an existing design?
No, not without design validation. Although they are pin-compatible and share the same package and output slope, each is calibrated for a different thermocouple type (K-type for the AD8495ARMZ, J-type for the AD8496ARMZ). Substitution requires verifying thermocouple compatibility, cold junction compensation accuracy, and the resulting temperature measurement error against the manufacturer datasheet.
What is the operating temperature range for these thermocouple amplifiers?
Both the AD8495ARMZ and AD8496ARMZ are specified for an operating temperature range of −40°C to +125°C, as stated in the manufacturer datasheet.
Do the AD8495ARMZ and AD8496ARMZ include cold junction compensation?
Yes. Both devices integrate cold junction compensation on-chip, but the compensation is tailored to the respective thermocouple type: K-type for the AD8495ARMZ and J-type for the AD8496ARMZ.