Part A
AD8495CRMZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5995 PCS
- Package
- MSOP-8
- Series
- Interface - Interfaces de Sensor e Detector
Replacement verdict
Compatible functional replacement candidate
The AD8495ARMZ and AD8495CRMZ are functionally equivalent thermocouple amplifier ICs sharing the same core specifications, differing only in specified temperature grade and package marking. The CRMZ variant offers a wider guaranteed operating temperature range, making it a suitable functional replacement for the ARMZ in most applications, provided the extended temperature specification is acceptable and package marking differences are validated against the design requirements.
Function and Output Type
High match
Package Type
High match
Operating Temperature Range
Validation required
Supply Voltage Range
High match
Parts at a glance
Part B
AD8495ARMZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7539 PCS
- Package
- MSOP-8
- Series
- Interface - Interfaces de Sensor e Detector
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 | AD8495CRMZ | Why it matters |
|---|---|---|---|
| Temperature Range | -40°C to +125°C | 0°C to +70°C | The wider industrial temperature range of the ARMZ version allows operation in harsher environments, while the CRMZ is limited to commercial temperature conditions. |
| Package / Grade | MSOP-8 (RM-8), A-grade | MSOP-8 (RM-8), C-grade | The grade designation reflects different tested performance limits and qualification levels; A-grade parts are typically specified over the industrial range while C-grade parts are commercial-grade. |
| Function | Thermocouple amplifier with cold junction compensation | Thermocouple amplifier with cold junction compensation | Both devices perform the same core signal-conditioning function for K-type thermocouples, making them functionally interchangeable in the same circuit topology. |
| Output Voltage Range | 0 V to (VS - 1.5 V) | 0 V to (VS - 1.5 V) | Identical output swing ensures the same ADC input range and signal scaling can be used without redesign. |
| Supply Voltage Range | 2.7 V to 18 V (single supply) | 2.7 V to 18 V (single supply) | Matching supply requirements mean the same power rail design works for either part. |
| Output Scale Factor | 5 mV/°C | 5 mV/°C | The identical transfer function (5 mV/°C) preserves the temperature-to-voltage mapping, so firmware and calibration remain valid across both parts. |
| Input Offset Voltage | ±0.5 mV (typical) | ±0.5 mV (typical) | Low and equal offset voltage keeps measurement accuracy consistent between the two devices. |
| Operating Supply Current | 180 µA (typical) | 180 µA (typical) | Identical quiescent current supports the same low-power budget in portable or loop-powered designs. |
| Mounting / Package Type | Surface mount, 8-lead MSOP | Surface mount, 8-lead MSOP | Same footprint and pinout allow drop-in board replacement without layout changes. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8495CRMZ | AD8495ARMZ |
|---|---|---|
| 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 | 0°C ~ 50°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What is the difference between the AD8495ARMZ and the AD8495CRMZ?
Both are AD8495 thermocouple amplifiers from Analog Devices in an 8-lead MSOP package. The difference is the specified temperature grade: the AD8495ARMZ is rated for the industrial temperature range of −40°C to +125°C, while the AD8495CRMZ is rated for the commercial temperature range of 0°C to +70°C. The electrical function and pinout are otherwise the same.
Are the AD8495ARMZ and AD8495CRMZ pin-compatible?
Yes. Both devices are offered in the same 8-lead MSOP (RM) package with an identical pinout, so they are pin-compatible and share the same PCB land pattern.
Can the AD8495CRMZ be used as a drop-in replacement for the AD8495ARMZ?
Only if the application's operating temperature stays within the AD8495CRMZ commercial range of 0°C to +70°C. For operation below 0°C or above +70°C, the AD8495ARMZ industrial-grade version must be used instead.
What is the function of the AD8495 devices?
The AD8495 is a precision analog thermocouple amplifier with cold-junction compensation, designed to produce an analog output proportional to temperature for K-type thermocouples. It integrates the amplifier and cold-junction compensation circuitry in a single MSOP package.
What supply voltage do the AD8495ARMZ 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.
Do the AD8495ARMZ and AD8495CRMZ differ in accuracy or output scaling?
No. Both grades share the same output scaling of 5 mV/°C and the same specified gain and offset performance. The only documented difference between the A and C grades is the operating temperature range.
Which grade should be selected for an industrial application?
The AD8495ARMZ should be selected for industrial applications because its −40°C to +125°C temperature range covers environments outside the 0°C to +70°C range of the AD8495CRMZ.