Overview
The AD8497CRMZ from Analog Devices Inc. is a precision instrumentation amplifier with a thermocouple cold junction compensator integrated into a single IC package. This device is specifically designed to work with K-type (chromel-alumel) thermocouples and produces a high-level output of 5 mV/°C directly from the thermocouple signal. It combines an ice point reference with a precalibrated amplifier, allowing it to function as either a standalone thermometer or as a switched output setpoint controller. The AD8497CRMZ is versatile, operating with a wide range of supply voltages from 2.7 V to 36 V, making it suitable for various applications, including industrial systems requiring a wide common-mode input range.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Part Number | AD8497CRMZ | - |
| Manufacturer | Analog Devices Inc. | - |
| Description | IC Thermocouple Amplifier with Cold Junction Compensation | - |
| Package/Case | 8-Lead MSOP | - |
| Operating Temperature Range | 25°C to 100°C | °C |
| Supply Voltage Range | 2.7 V to 36 V | V |
| Output Voltage per °C | 5 mV/°C | mV/°C |
| Input Type | Differential | - |
| Input Bias Current | 25 nA | nA |
| Input Offset Current | 1.5 nA | nA |
| Common-Mode Rejection Ratio (CMRR) | 1 °C/V | °C/V |
| Power Supply Rejection Ratio (PSRR) | 0.5 °C/V | °C/V |
| Operating Supply Current | 180 μA | μA |
| Maximum Supply Current | 250 μA | μA |
| RoHS Status | ROHS3 Compliant | - |
Key Features
- Precision Thermocouple Signal Conditioning: The AD8497CRMZ provides a complete, precision laser wafer trimmed thermocouple signal conditioning system in a single IC package.
- Flexible Pinout: Allows operation as a setpoint controller or as a standalone Celsius thermometer.
- Rugged Inputs: Withstands 4 kV ESD and provides overvoltage protection (OVP) up to VS ± 25 V.
- Differential Inputs: Rejects common-mode noise on the thermocouple leads.
- Reference Pin Voltage Offset: Can be offset to measure 0°C on single supplies.
- Compact and RoHS Compliant Package: Available in a small, 8-lead MSOP package that is fully RoHS compliant.
- Wide Supply Voltage Range: Operates with supply voltages from 2.7 V to 36 V, making it suitable for various applications.
Applications
- Industrial Temperature Measurement: Suitable for industrial systems requiring precise temperature measurement over a wide range.
- Process Control: Can be used as setpoint controllers in process control applications.
- Automotive Systems: Applicable in automotive systems where robust and accurate temperature measurement is crucial.
- Medical Devices: Used in medical devices that require precise temperature monitoring and control.
- Aerospace and Defense: Suitable for aerospace and defense applications due to its high reliability and precision.
Q & A
- What is the AD8497CRMZ used for?
The AD8497CRMZ is used for precision thermocouple signal conditioning, particularly with K-type thermocouples, and can function as a standalone thermometer or setpoint controller.
- What is the operating temperature range of the AD8497CRMZ?
The operating temperature range of the AD8497CRMZ is from 25°C to 100°C.
- What is the output voltage per degree Celsius for the AD8497CRMZ?
The output voltage per degree Celsius for the AD8497CRMZ is 5 mV/°C.
- What is the supply voltage range for the AD8497CRMZ?
The AD8497CRMZ operates with supply voltages ranging from 2.7 V to 36 V.
- Is the AD8497CRMZ RoHS compliant?
Yes, the AD8497CRMZ is ROHS3 compliant.
- What type of inputs does the AD8497CRMZ have?
The AD8497CRMZ has differential inputs.
- What is the typical operating supply current of the AD8497CRMZ?
The typical operating supply current of the AD8497CRMZ is 180 μA.
- Does the AD8497CRMZ have ESD protection?
Yes, the AD8497CRMZ withstands 4 kV ESD and provides overvoltage protection (OVP) up to VS ± 25 V.
- In what package is the AD8497CRMZ available?
The AD8497CRMZ is available in an 8-lead MSOP package.
- Can the AD8497CRMZ be used in industrial systems?
Yes, the AD8497CRMZ is suitable for industrial systems due to its wide common-mode input range and robust design.
