The **MPXM2053GS** (and the wider MPXM2053 series) is a silicon piezoresistive pressure sensor manufactured by NXP Semiconductors (formerly Freescale). It is designed for high-accuracy medical and industrial applications where a small footprint is required. --- ### 1. Key Technical Specifications The MPXM2053 is a "compensated" sensor, meaning it includes internal circuitry to offset temperature drift. | Parameter | Specification | | :--- | :--- | | **Pressure Range** | 0 to 50 kPa (0 to 7.25 psi) | | **Operating Voltage ($V_{cc}$)** | 10V (Typical), 16V (Max) | | **Sensitivity** | 0.8 mV/kPa | | **Output Type** | Analog (Ratiometric) | | **Full Scale Span** | 40 mV (Typical) | | **Operating Temp Range** | -40°C to +125°C | | **Package Type** | M-PAK (5-Pin Small Outline) | --- ### 2. Functional Description The sensor operates on the principle of the **Wheatstone Bridge**. When pressure is applied to the silicon diaphragm, the resistance of the embedded strain gauges changes, producing a differential voltage. #### Features: * **Temperature Compensation:** It includes an on-chip thin-film resistor network that is laser-trimmed to provide precise span and offset calibration. * **Linearity:** It maintains a highly linear output voltage directly proportional to the applied pressure. * **Ratiometricity:** The output voltage scales linearly with the supply voltage ($V_{out} \propto V_{cc}$). --- ### 3. Pin Configuration The MPXM2053 series typically utilizes a 5-pin M-PAK configuration. | Pin Number | Function | Description | | :--- | :--- | :--- | | 1 | **GND** | Ground | | 2 | **V+** | Positive Output ($V_{out}$+) | | 3 | **Vs** | Supply Voltage ($V_{cc}$) | | 4 | **V-** | Negative Output ($V_{out}$-) | | 5 | **N/C** | Not Connected | --- ### 4. Application Circuit (Example) Since the output is a small differential voltage (millivolts), it usually requires an **Instrumentation Amplifier** before being read by a Microcontroller (MCU) ADC. ```python # Simplified Gain Calculation Example V_supply = 10.0 # Volts Pressure_kPa = 25 # 50% of range Sensitivity = 0.8 / 1000 # 0.8mV per kPa # Calculate raw differential output V_diff = Pressure_kPa * Sensitivity * (V_supply / 10.0) # If using an Op-Amp with Gain of 100 V_final = V_diff * 100 print(f"Output to ADC: {V_final} Volts") ``` --- ### 5. Common Applications * **Medical:** Patient monitoring, blood pressure equipment, and respirators. * **Industrial:** Pressure switches, leak detection, and liquid level measurement. * **Automotive:** Engine control and air pressure monitoring.