Analog Devices Inc. AD22100KT

The AD22100KT, produced by Analog Devices Inc., is a monolithic temperature sensor with on-chip signal conditioning. This device is designed to operate over a wide temperature range of −50°C to +150°C, making it suitable for various applications in HVAC, instrumentation, and automotive sectors. The AD22100KT features a ratiometric output, meaning its output voltage is proportional to the supply voltage, which simplifies interfacing with analog-to-digital converters (ADCs) and eliminates the need for a precision reference voltage. The sensor includes a proprietary temperature-dependent resistor and an op-amp signal conditioning block, ensuring high accuracy and linearity without the need for external trimming, buffering, or linearization circuitry.

• Ratiometric Output: The output voltage is proportional to the supply voltage, simplifying the interface with ADCs and eliminating the need for a precision reference voltage.
• On-Chip Signal Conditioning: No external trimming, buffering, or linearization circuitry is required, reducing system complexity and cost.
• High Accuracy and Linearity: The sensor exhibits high accuracy and linearity, with a temperature coefficient of 22.5 mV/°C and an error of ±2.0°C at 25°C.
• Wide Operating Temperature Range: Operates from −50°C to +150°C, making it suitable for a variety of applications.
• Reverse Voltage Protection and Minimal Self-Heating: Ensures robust operation and minimizes thermal effects on the measurement.
• High-Level, Low-Impedance Output: The output stage can withstand an indefinite short circuit to either ground or the power supply.

• HVAC Systems: Ideal for temperature sensing and control in heating, ventilation, and air conditioning systems.
• System Temperature Compensation: Used to compensate for temperature variations in electronic systems.
• Board Level Temperature Sensing: Suitable for monitoring temperatures on circuit boards and in electronic enclosures.
• Electronic Thermostats: Used in thermostat applications requiring precise temperature control.
• Industrial Process Control and Instrumentation: Applied in various industrial and instrumentation settings where accurate temperature measurement is crucial.
• Automotive Applications: Used in automotive systems for temperature monitoring and control.

1. What is the operating temperature range of the AD22100KT?
   The AD22100KT operates over a temperature range of −50°C to +150°C.
2. What is the typical output voltage at 25°C for the AD22100KT?
   The typical output voltage at 25°C is 1.938 V.
3. What is the temperature coefficient of the AD22100KT?
   The temperature coefficient is 22.5 mV/°C.
4. Does the AD22100KT require external signal conditioning?
   No, the AD22100KT includes on-chip signal conditioning, eliminating the need for external trimming, buffering, or linearization circuitry.
5. What is the quiescent current of the AD22100KT?
   The quiescent current is typically 650 µA, with a minimum of 500 µA.
6. What are the common applications of the AD22100KT?
   Common applications include HVAC systems, system temperature compensation, board level temperature sensing, electronic thermostats, industrial process control, instrumentation, and automotive applications.
7. What is the package type of the AD22100KT?
   The package types are TO-226-3 and TO-92-3 (TO-226AA).
8. Is the AD22100KT RoHS compliant?
   Some versions of the AD22100KT are RoHS compliant, while others are not. It depends on the specific variant.
9. What is the output type of the AD22100KT?
   The output type is analog voltage.
10. Can the AD22100KT withstand short circuits?
    Yes, the output stage of the AD22100KT can withstand an indefinite short circuit to either ground or the power supply.