Pressure Sensors: Differences Between Digitally Compensated and Analog Uncompensated Sensors
Digitally compensated pressure sensors are fully calibrated and compensated finished sensor modules provided by us, not individual sensors alone. These modules can be single sensors with digital output or integrated structures incorporating our flanges, signal conditioning, and digital processing circuitry. We conduct high- and low-temperature full-range testing and multi-point calibration in advance, achieving compensation for zero offset, temperature drift, sensitivity, and nonlinearity through digital algorithms. After compensation, the module directly outputs actual pressure values, such as in kPa, in digital form. Users no longer need to perform temperature compensation or algorithm development; they simply read the digital data for immediate use. This significantly lowers the application barrier and enhances system consistency and reliability.
Analog uncompensated pressure sensors primarily provide basic sensing functionality. Structurally, they typically consist only of the sensing chip and basic connections, outputting millivolt-level analog signals. The sensors themselves lack the capability for high- and low-temperature compensation. During use, users must design amplification circuits, collect temperature information, and perform high- and low-temperature compensation and calibration at the system level to convert the signals into actual pressure values. This approach offers higher flexibility and lower costs but places greater demands on the user's hardware and algorithm capabilities, with longer development and debugging cycles.
SP26-UART
The SP26-UART general-interface monosilicon pressure sensor utilizes monosilicon piezoresistive technology at its core. The sensor integrates temperature-sensitive elements and a high-performance dual-channel 24-bit ADC ASIC. It performs second-order temperature drift calibration for zero offset and sensitivity, as well as third-order nonlinear calibration, maximizing the temperature performance of the sensing element. The sensor outputs digital UART signals, representing a fully digital and intelligent sensing component. It is suitable for various harsh environments, with an operating temperature range of -40°C to 85°C. It also features high measurement accuracy, high stability, strong output signals, and excellent long-term stability.
LEEG's Design Capabilities
We possess five core technological capabilities: sensor design, signal processing module design, multi-stage high-precision temperature compensation algorithm development, transmitter packaging structure design, and flexible automated production line construction. In terms of sensor design capabilities, we have complete in-house design capabilities for core sensing element application-level solutions. Based on an in-depth understanding of monosilicon/MEMS piezoresistive principles and material characteristics, we are able to perform structural modeling and layout design tailored to different measurement ranges and operational requirements. This approach optimizes signal output, stress distribution, and sensor diaphragm structure, thereby enhancing sensitivity and long-term stability from the design stage. Additionally, by considering factors such as temperature characteristics and media compatibility during the design phase, we ensure the sensor maintains stable performance under harsh conditions such as high and low-temperature media and pressure impacts. This lays a solid foundation for the subsequent production of high-precision, highly stable pressure sensors and transmitters.
