GZP6182A-02: Absolute Pressure

Sensor Attribute	Attribute Value
Product Category	Pressure Transducer
Product Series	GZP6182A-02
Pressure Type	Gauge Pressure
Pressure Range	-3.75~1.25/-3.75~3.5/-14.3~60/-20~40kPa
Power Supply Type	5±0.25Vdc
Output Value	0.5～4.5V or 4.5～0.5V(customized output )
Accuracy	±3.4%FSS with normal working situation
Operating Temperature	-40 to 130°C
Maximum Voltage	18V
Reverse Voltage	-14V
Overload Pressure	68kPA or 300kPA (60s) according to the range
Protection level	IP6K9K
Clamp Voltage	refer to sensor drawing
Application	OEM-fitted Automotive application(Fuel manifold)

Product Description

The GZP6182 series products are calibrated fuel evaporation pressure sensor that launched by Sencoch for the automotive market. This product is used to measure the fuel evaporative pressure in the fuel pump or fuel manifold to ensure the EVAP system is functioning properly and reducing emissions. The product uses an automotive-grade signal conditioning chip to calibrate and compensate the output of the MEMS chip. It can convert pressure signals into analog voltages (range and output can be customized). The sensor has fast response, high reliability, and good stability. It is a high-performance sensor product with excellent cost-effectiveness.

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

In automotive fuel tank applications, this technology monitors changes in the vacuum level within the vehicle's fuel evaporation system to determine if the system meets the standards for fuel evaporation leakage. Based on the pressure value within the cavity, it further determines whether there is a risk of fuel vapor emission. The detected pressure value is converted into a corresponding voltage value, and this pressure signal is transmitted to the ECU.