Product Overview
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The SPI integrated pressure transducer delivers high-accuracy pressure data in an industry-standard SPI digital format, eliminating the analog signal chain complexity of traditional sensors. Its core is a proven piezoresistive pressure sensor with integrated temperature-sensitive elements, factory-calibrated and normalized, with correction coefficients stored in on-board EEPROM. The result is a drop-in pressure sensing module that communicates directly with microcontrollers and processors-no external calibration, no signal conditioning, and no application-level compensation. With a 0-20 psi absolute range, ±0.04% FS accuracy over -40°C to +85°C, and a compact, lightweight package, it is engineered for embedded pressure sensing in air data computers, altimeters, engine test systems, and precision instrumentation.
Product Advantages
Plug-and-Play Digital Integration: The SPI interface connects directly to a microcontroller timer/counter or SPI peripheral. No external ADC, op-amps, or analog filters are required.
Factory-Calibrated, Ready to Use: All pressure and temperature correction coefficients are pre-loaded into EEPROM. System designers do not need to perform sensor-level calibration or maintain coefficient tables.
High Accuracy Over Wide Temperature: ±0.04% FS total error band across -40°C to +85°C eliminates the accuracy penalties and thermal compensation burden typical of uncompensated sensors.
Excellent Long-Term Stability: ≤0.025% FS per year drift specification reduces recalibration intervals and maintains measurement integrity over the product lifecycle.
Compact System Footprint: The integrated module replaces a discrete sensor + signal conditioning + ADC chain, saving board space and reducing bill-of-materials complexity.
Specifications
| Product Type | Integrated pressure transducer / SPI pressure transducer module |
|---|---|
| Pressure Range | 0 ~ 20 psi (absolute) |
| Pressure Type | Absolute (vacuum-referenced) |
| Overload Pressure | 1.5× full-scale pressure |
| Burst Pressure | 2× full-scale pressure |
| Accuracy | ±0.04% FS (total error band, -40°C ~ +85°C) |
| Long-Term Stability | ≤ 0.025% FS per year |
| Digital Interface | 3.3V SPI, mode 1,1 |
| SPI Clock (SCLK) | ≤ 5 MHz |
| Output Data | 24-bit pressure value; 16-bit temperature value |
| EEPROM | 256 × 16 bits (calibration and configuration data) |
| Sampling Rate | 166 Hz (samples per second) |
| Supply Voltage | 4V ~ 12V DC |
| Operating Temperature | -40°C ~ +85°C |
| Storage Temperature | -40°C ~ +85°C |
| Media Compatibility | Dry, non-corrosive gases (316L stainless steel interface) |
| Electrical Connection | 2.0mm pitch, 2×4P vertical SMT header |
| Package | Compact PCB module with stainless steel pressure port |
Application
The SPI integrated pressure transducer is engineered for embedded systems where high accuracy, digital simplicity, and compact size converge. Its SPI interface and factory calibration make it the preferred building block for air data computers, altimeters, cabin pressure systems, and engine/flight test instrumentation-applications that demand reliable absolute pressure data without the overhead of external signal conditioning.
Air data computers
Flight test systems
Altimeters & barometric instrumentation
Instrumentation & analytical equipment
Cabin air pressure monitoring
Engine test systems
Flow and pressure calibrators
Meteorology & weather stations
External dimension
🔌Electrical Connection
FAQ
Q: What is an integrated pressure transducer and how does it differ from a standard pressure sensor?
A: An integrated pressure transducer combines a pressure sensing element with signal processing, ADC conversion, temperature compensation, and calibration data storage in a single module. Unlike a bare pressure sensor that outputs a raw analog signal and requires external circuitry and calibration, this device delivers a fully processed digital pressure value over an SPI interface-ready to use with no additional signal chain design.
Q: What does "on-board EEPROM calibration" mean for my system design?
A: The SPI integrated pressure transducer stores its factory-measured pressure and temperature calibration coefficients in on-board EEPROM. Your microcontroller reads the raw sensor data, applies these coefficients, and obtains an accurate pressure reading. You do not need to perform sensor-level calibration, maintain coefficient tables in your firmware, or add any external compensation circuitry. The module is essentially a drop-in digital pressure source.
Q: What SPI configuration is required to communicate with the transducer?
A: The device uses a 3.3V SPI interface in mode 1,1 (CPOL = 0, CPHA = 1) with a maximum SCLK frequency of 5 MHz. It outputs 24-bit pressure and 16-bit temperature data. Most microcontrollers and SPI peripherals can interface directly without level shifting, provided the host operates at 3.3V logic levels.
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