In the global fight against the epidemic, ventilators have become one of the important medical equipment for treating severe patients with new coronary pneumonia. As an effective means to artificially replace the function of autonomous ventilation, ventilator has been widely used in the fields of critical care, emergency, anesthesia and home health care in modern clinical medicine. With the continuous strengthening of people's health awareness, the rapid development of home medical equipment has been driven. Home ventilators can also help snoring people relieve symptoms of dyspnea and improve sleep quality.
The ventilator mainly determines the breathing state of the patient by detecting the difference between the gas pressure at the ventilator end and the external pressure, thereby realizing the role of assisted breathing. Its interior is often inseparable from a high-precision, high-reliability, and high-stability pressure sensor.
Nanochip announced the launch of a gauge pressure sensor NSPGS5 series. This series of products uses a CMOS mixed-signal conditioning chip to amplify, calibrate and compensate the output of the MEMS core, and can convert pressure signals from -10kPa to +10kPa into analog signals and digital signals with a customizable output range (0~5V). I2C signal. At the same time, the built-in MEMS differential pressure core is designed based on the high-sensitivity single-crystal silicon piezoresistive effect and adopts advanced silicon-silicon bonded CSOI MEMS micromachining process. The accuracy and stability of the MEMS core during the life cycle are better than 1%FS.
This series of products are mainly used in medical fields such as ventilators, oxygen generators, anesthesia instruments, pulmonary function detectors, sphygmomanometers and biological safety cabinets; at the same time, they are also useful in gas flow detection, pressure switches and industrial control.
The main features of the product are as follows:
● High precision and low power consumption: high linearity, good stability, no need for calibration, 100% temperature compensation, factory accuracy better than ±1%F.S., life cycle accuracy better than ±2%F.S., working current less than 3.5mA in full temperature range .
● Multiple output modes: support analog absolute output and digital I2C (under development) output, suitable for a variety of application requirements, simple and convenient, and good portability.
● Customized products: The range within -10kPa~10kPa can be customized, the output mode (analog/I2C) can be customized, it supports a variety of pressure application scenarios, and has high flexibility.
● Wide temperature range: -20℃~85℃ working temperature, 0℃~70℃ compensation temperature. The extremely wide temperature range can help the ventilator be suitable for various harsh working environments, and the wide temperature compensation range can also ensure the stability of the product and greatly reduce the impact of temperature changes on the product function.
● Single air nozzle package form: SOIC-16 package form with single air nozzle is adopted, which supports front air intake, and has atmospheric through holes on the back, which saves the structural design space of the ventilator as much as possible. With high reliability and stress relief characteristics, it is convenient for customers to solder and use while ensuring the excellent performance and reliability of the product.
