Overview
The AD22100ATZ, 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 highly suitable for various applications in HVAC, instrumentation, and automotive sectors. The AD22100ATZ eliminates the need for external trimming, buffering, or linearization circuitry, thereby simplifying system design and reducing overall system cost. Its ratiometric output voltage is proportional to the temperature times the supply voltage, which facilitates cost-effective integration with analog-to-digital converters (ADCs).
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Transfer Function | VOUT = (V+/5 V) × [1.375 V + (22.5 mV/°C) × TA] | V | ||
| Temperature Coefficient | (V+/5 V) × 22.5 mV/°C | mV/°C | ||
| Output Characteristics - Error at TA = 25°C | ±0.5 | ±2.0 | °C | |
| Output Characteristics - Nominal Output Voltage at TA = 25°C | 1.938 V | V | ||
| Power Supply - Operating Voltage | 4.0 | 5.0 | 6.5 | V |
| Power Supply - Quiescent Current | 500 | 650 | µA | |
| Temperature Range - Guaranteed Temperature Range | -50 to +150 | °C | ||
Key Features
- Ratiometric Output: The output voltage is proportional to the temperature times the supply voltage, making it ideal for interfacing with analog-to-digital converters without the need for a precision reference.
- On-Chip Signal Conditioning: Eliminates the need for external trimming, buffering, or linearization circuitry, simplifying system design and reducing cost.
- Wide Temperature Range: Operates from -50°C to +150°C, suitable for various industrial and automotive applications.
- High Linearity: Better than ±1% of full scale, ensuring accurate temperature measurements.
- Reverse Voltage Protection and Minimal Self-Heating: Enhances reliability and accuracy in harsh environments.
- Low Impedance Output: Capable of withstanding an indefinite short circuit to either ground or the power supply, ensuring robust output stage performance.
Applications
- HVAC Systems: Ideal for temperature sensing and control in heating, ventilation, and air conditioning systems.
- System Temperature Compensation: Used for compensating temperature variations in electronic systems.
- Board Level Temperature Sensing: Suitable for monitoring temperatures on PCBs and other electronic boards.
- Electronic Thermostats: Used in thermostat applications requiring precise temperature control.
- Industrial Process Control and Instrumentation: Applied in various industrial processes and instrumentation where accurate temperature measurement is crucial.
- Automotive Applications: Used in automotive systems for temperature monitoring and control.
Q & A
- What is the operating temperature range of the AD22100ATZ?
The AD22100ATZ operates over a temperature range of -50°C to +150°C.
- What is the significance of the ratiometric output of the AD22100ATZ?
The ratiometric output allows the device to interface directly with analog-to-digital converters without the need for a precision reference voltage, reducing system cost and complexity.
- Does the AD22100ATZ require external signal conditioning?
No, the AD22100ATZ has on-chip signal conditioning, eliminating the need for external trimming, buffering, or linearization circuitry.
- What is the typical output voltage range of the AD22100ATZ?
The output voltage swings from 0.25 V at -50°C to 4.75 V at +150°C using a single +5.0 V supply.
- Is the AD22100ATZ suitable for automotive applications?
- How does the AD22100ATZ protect against reverse voltage?
The AD22100ATZ includes reverse voltage protection to enhance its reliability in harsh environments.
- What is the quiescent current of the AD22100ATZ?
The quiescent current of the AD22100ATZ is typically 650 µA at 5.0 V supply voltage.
- Can the AD22100ATZ withstand short circuits?
- What are the common applications of the AD22100ATZ in HVAC systems?
The AD22100ATZ is commonly used for temperature sensing and control in heating, ventilation, and air conditioning systems.
- How does the AD22100ATZ minimize self-heating?
The AD22100ATZ is designed to minimize self-heating, ensuring accurate temperature measurements even in continuous operation.
