The **M5TS-50-R** is a high-performance, non-contact infrared (IR) temperature sensor module, typically utilized in medical, industrial, and consumer electronics for rapid temperature detection. --- ### 1. Key Technical Specifications The following table outlines the primary electrical and performance characteristics of the M5TS-50-R: | Parameter | Specification | | :--- | :--- | | **Input Voltage (VCC)** | 3.0V to 5.0V DC | | **Object Temperature Range** | -30°C to +300°C | | **Ambient Temperature Range** | -20°C to +85°C | | **Accuracy** | ±2.0% or ±2°C (whichever is greater) | | **Resolution** | 0.1°C | | **Communication Interface** | I2C (Inter-Integrated Circuit) | | **Field of View (FOV)** | 50° (standard) | --- ### 2. Core Electronic Components The device is an integrated system-on-chip (SoC) module containing several critical sub-components: #### A. Thermopile Detector The heart of the module is a thermopile sensor. It consists of multiple thermocouples connected in series. When infrared radiation from an object hits the sensor, it creates a tiny voltage (the Seebeck effect) proportional to the temperature difference between the object and the sensor. #### B. Optical Lens and Filter A silicon lens with a specific long-pass filter (typically 5.5µm to 14µm) sits above the sensor. This ensures the device only "sees" the infrared spectrum emitted by heat and is not affected by visible light. #### C. Signal Conditioning (ASIC) Because the raw output from a thermopile is in the microvolt range, the module includes an Application-Specific Integrated Circuit (ASIC) that performs: * **Low-Noise Amplification:** Boosting the tiny analog signal. * **ADC (Analog-to-Digital Converter):** Converting the signal into high-resolution digital data. * **Digital Signal Processing (DSP):** Applying calibration constants and compensation algorithms. #### D. Internal Thermistor To calculate the absolute temperature of a target, the sensor must know its own internal temperature (ambient temperature). A high-precision thermistor is integrated inside the package for "cold junction compensation." --- ### 3. Connection Pinout The module typically features a 4-pin interface for easy integration with microcontrollers like Arduino, ESP32, or STM32: 1. **VCC:** Power supply (3.3V/5V). 2. **GND:** Ground. 3. **SCL:** I2C Clock Line. 4. **SDA:** I2C Data Line. --- ### 4. Typical Application Circuit ```cpp // Pseudocode for I2C Communication #include void setup() { Wire.begin(); // Join I2C bus Serial.begin(9600); } void loop() { // 1. Send command to M5TS address // 2. Read high and low bytes // 3. Calculate temperature: (High << 8 | Low) / 10.0 delay(500); } ```