GZP6189A: Absolute Pressure

Sensor Attribute	Attribute Value
Product Category	Pressure Transducer
Product Series	GZP6189A-00
Pressure Type	Absolute Pressure
Pressure Range	10~115kPa
Power Supply Type	5±0.25Vdc
Output Value	0.4～4.65V (customized output )
Accuracy	±1.5%FSS@0～80°C
Operating Temperature	-40 to 130°C
Maximum Voltage	18V
Reverse Voltage	-14V
Overload Pressure	500kPA (60s)
Protection level	IP6K9K
Clamp Voltage	refer to sensor drawing
Application	OEM-fitted Automotive application(Air Brake)

Product Description

GZP6189A vacuum-Brake pressure sensor is a finished pressure sensor launched b Sencoch for the automobile market.

Using the MEMS piezoresistive effect, when the sensor is affected by the pressure change in the vacuum-Brake system, its internal resistance value will change accordingly. By measuring the change in the resistance value, the size of the pressure is reflected, and the pressure signal is converted into electrical signal output, so that the vehicle’s electronic control system can monitor and the sensor has the advantages of fast response, high accuracy, good stability and low cost. It is a cost-effective pressure 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.

Applications

The product is installed on the braking vacuum pipeline system, which is used to monitor the vacuum degree in the current braking vacuum pipeline and feedback the size of the current braking assistance. The pressure sensor converts the detected pressure into an electrical signal and inputs it into the vehicle's control system.