The **O2113** (often referenced as the **M2113** or related to specific modular electronic components like those from **ROBOX** or specialized industrial sensors) typically refers to a **High-Precision Oxygen Sensor Module** or a specific **Logic/Interface IC** depending on the manufacturer. In most modern industrial and hobbyist electronics, the O2113 series is associated with oxygen concentration measurement systems. --- ### 1. Key Technical Specifications Below are the typical parameters for an O2113-based sensing component: | Parameter | Typical Value | | :--- | :--- | | **Input Voltage** | 3.3V - 5V DC | | **Measurement Range** | 0% to 25% (O2 concentration) | | **Interface** | Analog Voltage / I2C (Digital) | | **Response Time ($T_{90}$)** | < 15 Seconds | | **Operating Temp** | -20°C to +50°C | --- ### 2. Functional Electronic Blocks The O2113 module is usually composed of four primary electronic stages: 1. **Electrochemical Cell:** The core sensor that generates a tiny current proportional to the partial pressure of oxygen. 2. **Transimpedance Amplifier (TIA):** Converts the nano-ampere current from the sensor into a measurable voltage. 3. **Temperature Compensation Circuit:** Uses a thermistor or internal NTC to adjust the output, as oxygen sensors are highly sensitive to thermal changes. 4. **Signal Conditioning:** Filters high-frequency noise and buffers the signal for an ADC (Analog-to-Digital Converter). --- ### 3. Pin Configuration (Standard 4-Pin Layout) If you are integrating this part into a PCB, the pinout usually follows this structure: | Pin | Label | Function | | :--- | :--- | :--- | | 1 | **VCC** | Power Supply (Positive) | | 2 | **GND** | Ground | | 3 | **OUT / SDA** | Analog Output or I2C Data | | 4 | **NC / SCL** | Not Connected or I2C Clock | --- ### 4. Implementation Example (Microcontroller) To read data from an O2113 analog sensor using an Arduino or similar MCU: ```cpp const int o2SensorPin = A0; // Connect O2113 Out to A0 void setup() { Serial.begin(9600); } void loop() { int sensorValue = analogRead(o2SensorPin); float voltage = sensorValue * (5.0 / 1023.0); // Example calibration formula float concentration = (voltage / 5.0) * 25.0; Serial.print("Oxygen Concentration: "); Serial.print(concentration); Serial.println("%"); delay(1000); } ```