Overview
The AD8496ARMZ, produced by Analog Devices Inc., is a precision instrumentation amplifier designed for thermocouple signal conditioning. It is part of the AD8494/AD8495/AD8496/AD8497 family, which integrates thermocouple cold junction compensators on a single integrated circuit. This device is precalibrated to match the characteristics of J-type (iron-constantan) thermocouples, making it a reliable choice for temperature measurement applications. The AD8496ARMZ offers a high-level output of 5 mV/°C directly from the thermocouple signal, combining an ice point reference with a precalibrated amplifier. It can operate as a standalone thermometer or as a setpoint controller, making it versatile for various industrial and commercial uses.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | 8-Lead MSOP | |
| Operating Voltage Range | 2.7 to 36 | V (Single Supply), ±2.7 to ±18 V (Dual Supply) |
| Quiescent Current | 180 to 250 | μA |
| Temperature Range (TA) | 25 to 100 | °C (Optimized), -40 to +125 °C (Operational) |
| Output Voltage | 5 mV/°C | |
| Input Voltage Range | -VS - 0.2 to +VS - 1.6 | V |
| Input Bias Current | 25 to 50 | nA |
| Common-Mode Rejection | 1 to 0.3 | °C/V |
| Power Supply Rejection | 0.5 | °C/V |
Key Features
- Precision Thermocouple Signal Conditioning: The AD8496ARMZ provides a high-level output of 5 mV/°C directly from the thermocouple signal, combining an ice point reference with a precalibrated amplifier.
- Flexible Power Supply: It can operate with a wide range of supply voltages, from 2.7 V to 36 V, making it suitable for various applications.
- High Impedance Differential Input: The device features high impedance differential inputs that reject common-mode noise on the thermocouple leads.
- ESD and Overvoltage Protection: The inputs are rugged and can withstand 4 kV ESD and provide overvoltage protection up to VS ± 25 V.
- Compact and RoHS Compliant Package: Available in an 8-lead MSOP package, which is fully RoHS compliant.
Applications
- Industrial Production: Suitable for temperature monitoring and control in industrial environments.
- Smart Home Appliances: Can be used in smart home devices that require precise temperature measurement.
- Electric Vehicles: Applicable in electric vehicle systems for temperature monitoring and control.
- Medical Devices: Used in medical equipment where accurate temperature measurement is critical.
- Internet of Things (IoT): Suitable for IoT applications that require reliable and precise temperature sensing.
Q & A
- What type of thermocouple does the AD8496ARMZ support?
The AD8496ARMZ is precalibrated to match the characteristics of J-type (iron-constantan) thermocouples.
- What is the output voltage of the AD8496ARMZ?
The output voltage is 5 mV/°C.
- What is the operating voltage range of the AD8496ARMZ?
The device can operate with a single supply voltage from 2.7 V to 36 V, and with dual supplies from ±2.7 V to ±18 V.
- What is the quiescent current of the AD8496ARMZ?
The quiescent current is typically between 180 μA and 250 μA.
- Does the AD8496ARMZ have ESD protection?
Yes, the inputs can withstand 4 kV ESD and provide overvoltage protection up to VS ± 25 V.
- What is the package type of the AD8496ARMZ?
The device is available in an 8-lead MSOP package.
- Is the AD8496ARMZ RoHS compliant?
Yes, the AD8496ARMZ is fully RoHS compliant.
- What are the common applications of the AD8496ARMZ?
It is used in industrial production, smart home appliances, electric vehicles, medical devices, and IoT applications.
- How does the AD8496ARMZ handle common-mode noise?
The device features high impedance differential inputs that reject common-mode noise on the thermocouple leads.
- Can the AD8496ARMZ operate as a standalone thermometer or setpoint controller?
Yes, it can operate in both modes.
