Overview
The AD8497ARMZ, produced by Analog Devices Inc., is a precision instrumentation amplifier with a thermocouple cold junction compensator integrated into a single IC package. This device is specifically calibrated for K-type (chromel-alumel) thermocouples and provides a high-level output 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 a switched output setpoint controller. The AD8497ARMZ can operate with a wide range of supply voltages, from 2.7 V to 36 V, making it versatile for various applications, including those requiring low power consumption and high common-mode input range.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Thermocouple Type | K (chromel-alumel) | - |
| Optimized Temperature Range | 25°C to 100°C | °C |
| Output Sensitivity | 5 mV/°C | mV/°C |
| Supply Voltage Range | 2.7 V to 36 V | V |
| Input Voltage Range | -VS - 0.2 to +VS - 1.6 | V |
| Overvoltage Range | +VS ± 25 V | V |
| Input Bias Current | 25 nA | nA |
| Common-Mode Rejection | 1 °C/V | °C/V |
| Power Supply Rejection | 0.5 °C/V | °C/V |
| Package Type | 8-Lead MSOP | - |
| Operating Temperature Range | -40°C to 125°C | °C |
Key Features
- Precision Thermocouple Signal Conditioning: The AD8497ARMZ provides a high-level output directly from the thermocouple signal with cold junction compensation, ensuring accurate temperature measurements.
- Flexible Supply Voltage: Operates with supply voltages ranging from 2.7 V to 36 V, making it suitable for a variety of applications.
- Low Power Consumption: The device operates with a total supply current of 180 μA, minimizing self-heating and power consumption.
- Rugged Inputs: Inputs are protected against 4 kV ESD and overvoltage up to ±25 V, ensuring robust performance in harsh environments.
- Differential Inputs: Rejects common-mode noise on the thermocouple leads, enhancing signal integrity.
- Compact Package: Available in a small, 8-lead MSOP package that is fully RoHS compliant.
Applications
- Industrial Temperature Measurement: Suitable for industrial systems requiring accurate temperature measurements over a wide range.
- Setpoint Controllers: Can be used as switched output setpoint controllers with either fixed or remote setpoint control.[
- Standalone Thermometers: Functions as standalone thermometers, providing direct temperature readings from thermocouple signals.[
- Low Power Systems: Ideal for applications where low power consumption is critical, such as in battery-powered devices.[
Q & A
- What type of thermocouple does the AD8497ARMZ support?
The AD8497ARMZ is calibrated for K-type (chromel-alumel) thermocouples.
- What is the output sensitivity of the AD8497ARMZ?
The output sensitivity is 5 mV/°C.
- What is the supply voltage range for the AD8497ARMZ?
The device operates with supply voltages ranging from 2.7 V to 36 V.
- How does the AD8497ARMZ handle common-mode noise?
The device has differential inputs that reject common-mode noise on the thermocouple leads.
- What is the typical operating current of the AD8497ARMZ?
The device typically operates with a total supply current of 180 μA.
- Is the AD8497ARMZ protected against overvoltage?
Yes, the inputs are protected against overvoltage up to ±25 V.
- What package type is the AD8497ARMZ available in?
The device is available in an 8-lead MSOP package.
- Is the AD8497ARMZ RoHS compliant?
Yes, the AD8497ARMZ is fully RoHS compliant.
- Can the AD8497ARMZ be used as a setpoint controller?
Yes, it can be used as a switched output setpoint controller with either fixed or remote setpoint control.[
- What is the operating temperature range of the AD8497ARMZ?
The operating temperature range is -40°C to 125°C.[
