The **49AV2-4W1A-R** is a specific electronic component typically categorized as a **Linear Hall Effect Sensor**. These sensors are designed to track magnetic field density and convert it into a proportional analog voltage output. --- ### 1. Key Technical Specifications The following table outlines the primary electrical characteristics of this component series: | Parameter | Typical Value / Range | | :--- | :--- | | **Supply Voltage (Vcc)** | 4.5 Vdc to 10.5 Vdc | | **Output Type** | Analog (Ratiometric) | | **Magnetic Range** | ±670 Gauss to ±1000 Gauss (Model dependent) | | **Sensitivity** | ~7.0 mV/G to 9.0 mV/G | | **Operating Temp** | -40°C to 125°C | | **Package Type** | Lead-free, SIP (Single In-line Package) | --- ### 2. Functional Breakdown This part operates based on the **Hall Effect principle**. When a magnetic field is applied to the sensor, it generates a voltage perpendicular to both the current flow and the magnetic field. * **Ratiometric Output:** The output voltage is proportional to the supply voltage. If the supply voltage fluctuates, the output shifts accordingly to maintain accuracy relative to the power source. * **Linearity:** Unlike "switch" type sensors that only output ON/OFF, this part provides a linear slope. This allows it to measure **distance** or **angle** based on the strength of the magnet nearby. * **Quiescent Voltage:** In the absence of a magnetic field (0 Gauss), the output usually sits at exactly half of the supply voltage ($Vcc / 2$). --- ### 3. Application Use Cases Because the 49AV2 series is high-precision and rugged, it is commonly used in industrial and automotive environments: 1. **Current Sensing:** Placed near a conductor to measure the magnetic field generated by flowing current. 2. **Throttle/Pedal Position:** Used in "drive-by-wire" systems to detect the physical position of a pedal. 3. **Vibration Detection:** Detecting minute movements in machinery by monitoring shifts in magnetic proximity. 4. **Liquid Level Sensing:** Combined with a float containing a magnet to determine fluid levels in a tank. --- ### 4. Wiring Diagram (Generic) ```cpp // Typical 3-Pin Configuration Pin 1: VCC (Power - e.g., 5V) Pin 2: GND (Ground) Pin 3: VOUT (Analog Output Signal) ```