The **ABP2 Series** (specifically parts starting with ABP2-R) refers to Honeywell’s **Basic Board Mount Pressure Sensors**. These are piezoresistive silicon pressure sensors providing a digital output for reading pressure over the specified full-scale pressure span and temperature range. --- ### 1. Key Technical Specifications The "R" in the part number typically signifies a specific **package type** (Leadless SMT) or **pressure port** configuration (Ribbed/Radial), depending on the specific suffix. | Feature | Specification | | :--- | :--- | | **Pressure Type** | Absolute, Gage, or Differential | | **Output Type** | Digital (I2C or SPI) | | **Pressure Range** | 6 mbar to 12 bar | | **Supply Voltage** | 1.8 V to 3.6 V (Low Power) | | **Resolution** | 24-bit Digital Output | | **Accuracy** | ±0.25 %FSS (Full Scale Span) | | **Operating Temp** | -40°C to 110°C | --- ### 2. Physical Construction (Electronic Parts) The ABP2 series is highly integrated, reducing the need for external circuitry. * **ASIC (Application Specific Integrated Circuit):** The internal ASIC performs temperature compensation and calibration. It converts the raw analog signal from the MEMS element into a digital value. * **MEMS Sensing Element:** A silicon-based piezoresistive chip that changes resistance when mechanical pressure is applied. * **Internal Temperature Sensor:** Used by the ASIC to provide a "Temperature Output" alongside the pressure reading, allowing for real-time environmental monitoring. * **Protective Coating:** Many models feature a silicone gel coating to protect the electronics from condensation and moisture. --- ### 3. Pinout and Interface The ABP2-R series primarily uses a **Surface Mount Technology (SMT)** footprint. Below is a standard pin configuration for the I2C version: | Pin Number | Function | Description | | :--- | :--- | :--- | | 1 | GND | Ground connection | | 2 | VDD | Power supply (1.8V - 3.6V) | | 3 | SCL / SS | Serial Clock (I2C) or Slave Select (SPI) | | 4 | SDA / MISO | Serial Data (I2C) or Master In Slave Out (SPI) | | 5 | EOC / MOSI | End-of-conversion or Master Out Slave In | | 6 | NC | No Connect (Leave floating) | --- ### 4. Part Numbering Example A typical part number like `ABP2MRRN001PDAA3` breaks down as follows: * **ABP2:** Product Series. * **M:** Leadless SMT Package. * **RR:** Dual radial barbed ports (The "R" indicates the port type). * **001PD:** 1 psi Differential. * **A:** I2C Address (0x28). * **3:** 3.3V Supply. --- ### 5. Application Areas * **Medical:** CPAP machines, blood pressure monitoring, hospital beds. * **Industrial:** HVAC transmitters, air filtration monitoring, gas leak detection. * **Consumer:** Coffee machines, washing machine water levels.