Maxim's Guide to Wearable Medical Devices

The outbreak of wearable devices has pushed the market for wearable medical devices to the forefront, and in this area, many companies have brought new products to market. More and more companies are entering the market with equipment that measures heart rate, sleep quality and even nutrient levels in the blood. As products such as Nike, Jawbone, FitBit, iHealth, and other manufacturers provide data to help them measure and manage fitness levels, consumer demand for fitness wearable devices continues to grow.

At the same time, as the key link or human-machine interface of the Internet of Things (IoT), wearable devices can use the Internet of Things to transmit the collected personal data to the cloud in a continuous manner for real-time monitoring. Wearables are just one of many devices that take advantage of Internet connectivity. But this connectivity comes at a price: privacy. To ensure privacy, strong security measures are needed to prevent data and personal information from being stolen.

In order to better collect and transmit data, we have a higher level of demand for many technologies such as sensor, computing, communication and power management for wearable devices.

As a leader in the analog industry, one of the first semiconductor manufacturers to enter the wearable market, Maxim uses its technological advantages to escort wearable devices in medical applications.

For wearable devices, collecting as much accurate data as possible is the most important part of a wearable medical application. This relies on a high-precision analog acquisition front end, so the sensor's role is irreplaceable. At the same time, wearable devices also have requirements for processing data and protecting the security of data. This requires manufacturers to optimize the design in all aspects.

According to Maxim, ultra-low-power analog measurement circuits, advanced processing running on low-power microcontrollers, and the moTIon rejecTIon algorithm are the first steps to implement wearable sensors because the signals from patients or users are usually small. And full of analog noise signals that need to be filtered out. At the same time, after filtering out the noise, since the data reflects the most private information, it must be secured to prevent it from being obtained by others. After the data is securely protected by advanced encryption technology, the data is sent to the mobile phone over a short-range wireless connection. Efficient power management of the internal battery (eg Maxim's ModelGauge) and energy harvesting technology keep the sensor working for long periods of time.

Maxim has his own unique insights and attempts in these areas:

(1) Ultra low power analog measurement

Analog circuits are interfaces from real-world signals to microcontrollers. Low-power, high-precision amplifiers (such as Maxim's MAX9617 series) feature low power, low noise, zero offset, and ultra-small package sizes. This family of amplifiers minimizes solution size and eliminates the need for calibration throughout the entire process.

(2) Advanced processing / algorithm

Maxim believes that medical researchers have worked hard over the past decade to make machines play a bigger role in the medical field, and have developed algorithms that accurately identify information about the human body. With these results, human information can be collected and pre-processed using a simple microcontroller to prepare for expert diagnosis.

(3) Low-power microcontroller

The reduced power consumption of the integrated microcontroller makes it possible to support long-term operation with a single-cell lithium battery. Maxim's MAXQ family of microcontrollers is ideal for battery-powered applications, with powerful computing power to support today's advanced algorithms. This family of microcontrollers can seamlessly connect to low-power, short-range wireless devices such as Bluetooth or ANT+.

(4) Security

As mentioned above, due to personal privacy requirements, individual data collected by wearable devices must be secured. There are currently several methods for securing data collected from patients or clients.

Maxim is a leader in the secure microcontroller market with medical applications such as the DS28E01 that can be used in many different types of medical devices today. As the market for wearable electronic devices grows, information security and wireless communications will become essential.

(5) Energy collection

The issue of energy consumption of wearable devices has always been the focus of major manufacturers. Maxim pointed out that thanks to the aforementioned equipment in terms of reducing power consumption, the energy collected from various energy sources (such as solar, thermal or piezoelectric sensors) has come into play. Maxim's MAX17710 energy harvesting charger and protector utilizes the collected energy. In the next five years, micro-collection sources will make this technology mainstream.

According to the current development situation, the fusion of the above technologies is a development trend of wearable electronic devices.

Now, designing a device powered by a single lithium coin cell battery (eg, wireless ECG, heart rate, oxygen content, breathing, body temperature monitoring equipment) has become a reality. The information from the sensor is measured, digitized, sent to a mobile phone, and transmitted to a doctor. This allows for the next stage of data processing, disease detection, prevention and advice.

After talking about his initial insights into wearables, Maxim re-emphasized its marketplace for wearable devices: the production of the lowest power, safest and highest precision equipment. Low power consumption reduces volume and cost; security ensures data security, so that information is not tampered with, thereby avoiding harm to people; high precision ensures that the correct results are obtained and corrective measures are taken, such as when taking medication.

Maxim has 72 product technologies that integrate these technologies into small, low-power devices to form our unique health platform. We are also developing algorithms and software that support this technology, making it suitable for people with large daily activities.

Maxim also focuses on reliable communications (with cell phones or central data aggregators), high-precision simulations (for accurate sign readings), and safety information (to protect people). All of this is based on the lowest power and smallest package design.

Of course, the information doctors get from patients is not enough. Of the health problems received, nearly 80% of cases did not find the root cause, and the drugs prescribed for the patients were often not what he/she needed. These drugs may not be effective for the condition.

However, if the doctor has mastered the information of the patient for several days or weeks, he can discover the trend of changes in vital signs and make a more reasonable diagnosis. People have hope for better treatment. Mobile phones are the gateway to the cloud, and large data servers will record and process health signals from patients. The server sends a notification to the doctor when professional medical intervention is required or if you want to stop the treatment by knowing the data.

In order to achieve communication between doctors and patients, Maxim also has its own solutions in the field of central servers and communication technology facilities. They offer a wide range of standard and specialized products for enterprises, telecommunications, wireless networks and servers.

These devices increase network data rates and communication reliability, enabling them to achieve impeccable quality of service, 7&TImes, and 24 hours of trouble-free operation. Maxim is proud to offer a very low-failure solution that ensures trouble-free operation of the global data network every day.

With the contributions made in all aspects of the industry chain, I believe Maxim can quickly lead us into this wonderful world of wearables.

——This article is selected from the “High-end Interview” column of the February issue of “Electronic Wearable Technology Special Issue” by E-Communication Network. Please indicate the source, please do not investigate it!

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