Part A
AD8495ARMZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 7539 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 AD8495ARMZ and AD8496CRMZ are both thermocouple amplifier ICs from the same Analog Devices AD849x family, sharing a common functional architecture and pinout. However, they are optimized for different thermocouple types and specified over different temperature grades, so substitution requires validation of the thermocouple type, gain calibration, and operating temperature range against the target application.
Thermocouple Type
Validation required
Package Type
High match
Operating Temperature Range
Validation required
Pin Configuration
High match
Parts at a glance
Part B
AD8496CRMZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 4676 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
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 | AD8496CRMZ | Why it matters |
|---|---|---|---|
| Sensor Type | K-type thermocouple | J-type thermocouple | Determines which thermocouple the amplifier is calibrated for; using the wrong type produces large temperature errors. |
| Output Voltage at 25°C | 5 mV/°C (K-type) | 5 mV/°C (J-type) | Both provide a 5 mV/°C output, but the internal cold-junction compensation curve differs by thermocouple type. |
| Cold-Junction Compensation Range | 0°C to +50°C | 0°C to +50°C | Defines the ambient temperature window over which the internal cold-junction compensation is specified and accurate. |
| Temperature Range (Measurement) | -25°C to +400°C (K-type) | -25°C to +400°C (J-type) | Indicates the usable measurement span; the two parts cover similar ranges but for different thermocouple alloys. |
| Supply Voltage Range | 2.7 V to 18 V (single supply) | 2.7 V to 18 V (single supply) | Both operate over the same wide supply range, allowing similar power-supply design for either part. |
| Supply Current | ~180 µA typical | ~180 µA typical | Low quiescent current is important for battery-powered and low-power instrumentation designs. |
| Package | 8-lead MSOP (RMZ) | 8-lead MSOP (RMZ) | Identical package and pinout allow drop-in PCB compatibility between the two parts. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | Confirms both parts are rated for industrial temperature environments. |
| Output Type | Analog voltage (ratiometric to °C) | Analog voltage (ratiometric to °C) | Both provide a linear analog output suitable for direct ADC interfacing without digital processing. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8495ARMZ | AD8496CRMZ |
|---|---|---|
| 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 are the key differences between the AD8495ARMZ and AD8496CRMZ?
The AD8495ARMZ is a K-type thermocouple amplifier with a 5 mV/°C output slope and a 0°C reference junction compensation, housed in an 8-lead MSOP (RM) package. The AD8496CRMZ is a J-type thermocouple amplifier with a 5 mV/°C output slope and a 0°C reference junction compensation, housed in an 8-lead SOIC (R) package. The primary differences are the supported thermocouple type (K vs. J) and the package footprint (MSOP vs. SOIC).
Are the AD8495ARMZ and AD8496CRMZ pin-compatible?
No. The AD8495ARMZ uses an 8-lead MSOP package, while the AD8496CRMZ uses an 8-lead SOIC package. These are different package footprints with different PCB land patterns, so they are not drop-in replacements for each other without a board redesign.
Can the AD8495ARMZ and AD8496CRMZ be used interchangeably in a design?
No, not directly. The AD8495ARMZ is optimized for K-type thermocouples, and the AD8496CRMZ is optimized for J-type thermocouples. Each device's internal cold-junction compensation and transfer function are tailored to its respective thermocouple type, so substituting one for the other would produce incorrect temperature readings unless the thermocouple type and associated calibration are also changed.
What is the output voltage slope of the AD8495ARMZ and AD8496CRMZ?
Both the AD8495ARMZ and AD8496CRMZ provide a nominal output voltage slope of 5 mV/°C, allowing direct interfacing to ADCs with a standard voltage range.
What supply voltage range do the AD8495ARMZ and AD8496CRMZ 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 Analog Devices datasheet.
Do the AD8495ARMZ and AD8496CRMZ include cold-junction compensation?
Yes. Both devices integrate cold-junction compensation referenced to 0°C, eliminating the need for an external temperature sensor and compensation circuitry in thermocouple measurement systems.
What is the operating temperature range for the AD8495ARMZ and AD8496CRMZ?
Both the AD8495ARMZ and AD8496CRMZ are specified for operation over the −40°C to +125°C industrial temperature range.