Overview
The AD22100KRZ, produced by Analog Devices Inc., is a monolithic temperature sensor with on-chip signal conditioning. It operates over a wide temperature range of -50°C to +150°C, making it suitable for various applications in HVAC, instrumentation, and automotive sectors. The sensor features a ratiometric output, where the output voltage is proportional to the temperature times the supply voltage, simplifying system design and reducing overall system cost.
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 | ||
| Error at TA = 25°C | ±0.5 | ±2.0 | °C | |
| Nominal Output Voltage at TA = 25°C | 1.938 V | V | ||
| Operating Voltage | 4.0 | 5.0 | 6.5 | V |
| Quiescent Current | 500 | 650 | µA | |
| Guaranteed Temperature Range | -50 to +150 | °C | ||
| Package Type | 8-Lead Standard Small Outline Package (SOIC) | |||
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 trimming, buffering, or linearization circuitry, simplifying system design and reducing cost.
- High Accuracy and Linearity: Better than ±1% of full scale, with a temperature coefficient of 22.5 mV/°C.
- Minimal Self-Heating: Reduces thermal interference and ensures accurate temperature readings.
- Reverse Voltage Protection: Enhances reliability and protects the device from reverse voltage conditions.
- High Level, Low Impedance Output: Ensures robust and reliable output signals.
Applications
- HVAC Systems: For temperature sensing and control in heating, ventilation, and air conditioning systems.
- System Temperature Compensation: Compensates for temperature variations in electronic systems.
- Board Level Temperature Sensing: Monitors temperature at the board level in various electronic devices.
- Electronic Thermostats: Used in thermostats for precise temperature control.
- Industrial Process Control and Instrumentation: For accurate temperature measurement in industrial processes and instrumentation.
- Automotive Applications: Suitable for temperature sensing in automotive systems.
Q & A
- What is the operating temperature range of the AD22100KRZ?
The AD22100KRZ operates over a temperature range of -50°C to +150°C.
- What is the output voltage range of the AD22100KRZ?
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.
- What is the significance of the ratiometric output of the AD22100KRZ?
The ratiometric output allows the sensor to interface directly with an analog-to-digital converter without needing a precision reference, using the ADC's power supply as a reference.
- What type of package does the AD22100KRZ come in?
The AD22100KRZ comes in an 8-Lead Standard Small Outline Package (SOIC).
- What are some key applications of the AD22100KRZ?
Key applications include HVAC systems, system temperature compensation, board level temperature sensing, electronic thermostats, industrial process control, and automotive applications.
- Does the AD22100KRZ require external signal conditioning?
No, the AD22100KRZ has on-chip signal conditioning, eliminating the need for external trimming, buffering, or linearization circuitry.
- How accurate is the AD22100KRZ?
The AD22100KRZ has an accuracy better than ±1% of full scale and a temperature coefficient of 22.5 mV/°C.
- Is the AD22100KRZ protected against reverse voltage?
- What is the quiescent current of the AD22100KRZ?
The quiescent current is between 500 µA and 650 µA.
- Can the AD22100KRZ withstand short circuits?
