GZP6188A: Absolute Pressure

Product Description

GZP6188 series products are the finished sensor products that measure the absolute pressure in the engine compartment launched by Sencoch for the automobile market. The product uses an
automotive-grade signal conditioning chip to calibrate and compensate for the MEMS core output, which can convert the pressure signal from 20kPa to 115kPa into an analog output signal of 0.4V to 4.65V (range and output can be customized), with fast response speed, high reliability and stability. Good performance, it is a cost-effective sensor product.

Function Description

This product is manufactured using advanced microelectromechanical principles. Its core technologies are a silicon piezoresistive effect- based MEMS pressure sensor chip and a high performance signal conditioning ASIC chip. The silicon micro-piezoresistive MEMS pressure sensor chip outputs a voltage signal proportional to the measured pressure through a Wheatstone bridge composed of four strain-sensitive resistors. This signal is amplified, temperature-compensated, and linearized by the ASIC chip to obtain an output voltage that is proportional to the applied pressure. Linearization of the transfer function and temperature compensation are implemented by digital processing circuitry in the ASIC. Through polynomial compensation algorithms and multi-point pressure calibration technology at multiple temperatures, high-precision pressure measurement is achieved across the entire operating temperature range. The
transfer function of the pressure sensor is created by the following parameters:

• Minimum and maximum rated pressure
• Voltage values at minimum and maximum rated pressure
• Clamping voltage

All parameters required for the complete calibration algorithm (such as offset, gain, temperature coefficients of offset and gain, and linearization parameters) are determined and stored in the E²PROM inside the ASIC after calibration.