The **IRS080-R55VF11** is a specialized high-performance sensor module, typically categorized as a **Passive Infrared (PIR) Sensor** or a **Thermal Infrared Sensor**. These components are widely used in non-contact temperature measurement, human presence detection, and automated security systems. --- ### 1. Key Technical Specifications The part number indicates a specific configuration involving the sensor's sensitivity, field of view (FOV), and filtering capabilities. | Parameter | Typical Value / Description | | :--- | :--- | | **Sensor Type** | Pyroelectric / Passive Infrared (PIR) | | **Output Type** | Analog (Voltage variation based on IR flux) | | **Spectral Response** | 5.5µm to 14µm (Standard Long-wave IR) | | **Field of View (FOV)** | Approximately 80° to 110° (depending on lens) | | **Operating Voltage** | 2.0V to 15V DC | | **Package Style** | TO-5 or TO-39 Metal Can (Hermetically sealed) | --- ### 2. Internal Electronic Construction The device consists of several critical internal sub-components: 1. **Pyroelectric Element:** Usually made of Lithium Tantalate ($LiTaO_3$). It generates an electric charge when exposed to infrared radiation (heat). 2. **Infrared Filter (Window):** The "R55" designation often refers to a specific filter that limits the light spectrum allowed to hit the element, reducing false triggers from visible light. 3. **FET Buffer:** Since the pyroelectric element has extremely high impedance, an internal Field Effect Transistor (FET) is used as an impedance converter to allow the signal to be processed by external circuits. 4. **Optical Lens (Often External):** While the part is the sensor itself, it is almost always paired with a **Fresnel Lens** to focus IR energy onto the small internal sensing element. --- ### 3. Application Circuit Diagram (Conceptual) To use this part, you typically need a signal conditioning circuit to amplify the micro-volt signals. ```python # Conceptual Signal Chain for IRS080 [ Sensor ] -> [ Bandpass Filter ] -> [ Amplifier (Op-Amp) ] -> [ Comparator/MCU ] | | | | (Detects) (Removes Noise) (Boosts Signal) (Logic High/Low) ``` --- ### 4. Common Applications * **Security Systems:** Motion detectors for burglar alarms. * **Smart Lighting:** Automatic "on/off" switches for rooms or outdoor areas. * **Industrial Automation:** Non-contact detection of hot objects on a conveyor belt. * **Energy Management:** Detecting human presence to adjust HVAC or lighting levels. ---