Empowering a better life, Nanochip appears at SENSOR CHINA 2020

From September 23 to 25, with the theme of "Smart Sensing, Empowering a Better Life", Nanochip Microelectronics presented a variety of product applications at the China International Sensor Technology and Application Exhibition (Sensor China 2020), covering wearable devices, medical electronics, smart homes and other fields, demonstrating Nanochip's technical strength and innovative ideas in the sensor field from many aspects. Many experts on site answered questions and discussed the new trends in the development of sensors.

Figure 1: Naxin Micro exhibited a variety of products and application solutions at SENSOR CHINA 2020

As the entrance to the Internet of Everything, the importance of sensors is increasing, and their application scope and market size are also expanding. With the popularization of IoT applications, sensor systems are developing in the direction of miniaturization, intelligence, multi-function and networking. Therefore, sensors have always been the focus of Nanochip. Nanochip has successively launched a number of pressure and temperature sensor products that can be used in industry, automobiles, consumer electronics and other fields. The performance indicators have reached the leading level in the industry and have established a good market reputation. In addition, Nanochip also has a very rich portfolio of sensor signal conditioning chips, covering pressure, magnetic, current sensors, MEMS microphones, PIR infrared pyroelectric sensors, infrared thermopile sensors and other products.

High Precision Temperature Sensor NST1001

Meeting the body temperature monitoring application needs of the wearable device market

NST1001 is a high-precision two-pin temperature sensor with pulse counting digital output and high accuracy over a wide temperature range. It can be directly connected to an MCU to ensure measurement accuracy while reducing overhead. Applications include industrial IoT, digital output temperature probes, and white appliances.

Figure 2: Contact temperature measurement watch based on NST1001 temperature sensor

NST1001 provides a wide range of accuracy from ±0.1℃ to ±0.5℃ and has excellent low power consumption characteristics, meeting the needs of wearable devices to extend battery life. It has pulse output or standard I²C interface, and the package size is as small as 1.6x0.8mm or 3x3mm, which can help customers develop applications such as temperature measurement watches, temperature measurement bracelets, and body temperature measurement patches.

Highly integrated, low power consumption signal conditioning chip NSA2300

The built-in reference feature enables the forehead thermometer to achieve medical accuracy

NSA2300 is a highly integrated, low-power, high-precision sensor interface chip for bridge sensors that collects, amplifies and calibrates sensor signals. It can be used for pressure sensor conditioning, magnetic sensor conditioning, and various strain sensor interfaces. NSA2300 can provide on-chip sensor compensation for sensors, including zero drift and temperature compensation, sensitivity and temperature compensation, and nonlinear compensation.

Figure 3: Non-contact temperature measurement solution based on NSA2300 conditioning chip

The NSA2300 chip integrates a dual-channel 24-bit high-precision ADC with an equivalent temperature noise of less than 0.03°C. The main ADC channel is a differential input, and there is no problem caused by bias voltage. Its signal chain provides system-level chopping, the bias error reaches the 1μV level, the reference voltage can be configured to 1.8V, and it is compatible with low-voltage power supply (the power supply voltage can be less than 3V), meeting battery-powered application conditions. In addition, the NSA2300 highly integrated analog front end can simplify customer system design.

Liquid level sensor NSPGD1

Meet the requirements of different household appliances for liquid level measurement and make them smarter

NSPGD1 is a calibrated gauge pressure sensor launched by Nanochip for the home appliance market. The product uses a high-performance signal conditioning chip to calibrate and compensate the temperature and pressure of the MEMS piezoresistive core output, ensuring performance and reliability while integrating the package for easy use. Its typical application areas include accurate measurement of liquid level height in home appliances such as washing machines, dishwashers, coffee machines, and water purifiers. NSPGD1 can customize sensors with different ranges according to different customer needs to meet the liquid level measurement needs of different home appliances such as washing machines, coffee machines, and dishwashers.

Figure 4: Washing machine liquid level measurement demonstration based on NSPGD1

From the specific parameters, in the 6kPa range, the NSPGD1 full-range accuracy deviation is measured within 2 mm. The mechanical sensor can achieve a measurement error of about 5 mm at the middle water level, while the measurement error of high and low water levels will increase, about 15 mm. Compared with similar MEMS air pressure water level sensor chips, the full-temperature range accuracy of Naxinwei NSPGD1 is also significantly better than that of similar companies in the United States, Japan and other countries.

Highly integrated pyroelectric infrared sensor control chip NSA3182

With high cost-effectiveness and low power consumption, it is easier to implement in smart lighting and security occasions

NSA3182 is a highly integrated control chip for pyroelectric infrared sensor (PIR), which integrates all necessary components of pyroelectric passive infrared motion detection. The analog front end can be directly connected to the analog PIR detector using capacitors. The chip has built-in high-voltage LDO, simple peripheral circuits, high cost performance, low power consumption and easy implementation, and is widely used in intelligent lighting and security and other occasions.

Figure 5: PIR human body sensor light based on NSA3182

NSA3182 has a built-in high-precision analog-to-digital converter that can convert detector signals into digital signals. The mobile detection unit can perform algorithm identification for mobile heat sources, improve system anti-interference, and support relay output. The sensor sensitivity threshold and alarm maintenance time can be adjusted through external resistors, with a total of 16 switches.

Coreless circuit sensor chip NSA5312

Isolated current sampling can still be performed without magnetic components, suitable for smart wall plugs and smart PDUs, etc.

The coreless circuit sensor based on NSA5312 is a current sensor realized by the tunnel magnetoresistance (TMR) principle. It can perform isolated current sampling on the inner layer of the PCB without any magnetic components. It is suitable for scenarios with limited volume and PCB area, such as smart wall plugs and smart PDUs.

Figure 6: Non-magnetic board-level current measurement solution based on NSA5312

In the figure above, the role of NSA5312 is to drive and interface the TMR sensor, amplify and calibrate the original mV signal. In the case of rough calibration, the accuracy can be within 1%. In addition, the differential method is used for current sampling in the figure, which has a strong inhibitory effect on the external magnetic field, and the FR4 material of the PCB is used to isolate the inner and outer layers, which greatly reduces the insulation requirements and volume of the system.

The application solutions based on the above product series reflect the business philosophy of Naxinwei to provide customers with high-quality, cost-effective solutions through technological innovation. In the future, Naxinwei will focus on core technology, continue to deepen the three major markets of industry, automobile and consumer electronics, rapidly expand and enrich product categories, and help customers achieve industrial upgrading with high-quality domestic substitution.