In recent years, the medical semiconductor market has become one of the fastest growing semiconductor market segments. According to market research firm Databeans' 2010 estimates for medical semiconductors, the compound annual growth rate (CAGR) will reach 9.4% between 2010 and 2015. Among them, due to the trend of family health care and people's increased interest in health and health care equipment, the consumer health care classification market began to grow at a faster rate. As the premier supplier of high-performance silicon solutions for energy-efficient electronics, ON Semiconductor offers a broad lineup of medical applications that enable innovative medical electronics to achieve greater integration, miniaturization, energy efficiency and ease of use. , portability and durability, in line with the development of China's medical equipment trends.
China's medical equipment and medical semiconductor trends
A variety of factors will promote the growth of China's medical equipment market: first, the aging of the population. By 2030, the percentage of China's population over 60 will increase from 12.3% in 2010 to 24.4%, and by 2050 it will increase to 33.9. %; and people's life expectancy will be longer, the incidence of heart disease, diabetes, asthma will increase; there will be an expansion of the middle class, as well as increased medical spending, health insurance reform and so on.
From the perspective of medical equipment, the development of medical equipment in China has increased, and local manufacturers have tried to provide products that cost less than foreign competitors. Medical devices for the Chinese market are also constantly seeking to improve reliability, accuracy and precision, ease of use and portability. Correspondingly, medical semiconductors for medical devices are moving toward higher integration, miniaturization, and energy efficiency, as well as shifting consumer health devices to standard components.
ON Semiconductor's semiconductor solutions for consumer health medical devices
Semiconductor technology plays an important role in the field of medical device innovation. With a deep understanding of the quality, reliability and long-term requirements of the medical market, ON Semiconductor has global manufacturing and logistics capabilities to help medical device developers solve their unique design challenges with high-performance silicon solutions.
ON Semiconductor's medical semiconductor products cover key medical classification markets such as implants and clinical care, consumer health and hearing health. This article focuses on consumer health applications and explores the high-precision, high-reliability and low-energy solutions of ON Semiconductor.
1) Q32M210 32-bit mixed-signal MCU solution for portable medical devices such as blood glucose meters
Case studies on the current state of diabetes in China have shown that diabetes in China is on the rise due to changes in lifestyle and diet, the impact of Western-style diet patterns, lack of exercise, and the transition of agricultural countries to industrialized countries and more office jobs. More people need to monitor themselves with the blood glucose meter for trend analysis and communication with doctors to promote the use and sale of blood glucose meters (BGM).
ON Semiconductor offers the Q32M210, a sophisticated mixed-signal microcontroller (MCU) for portable inspection devices such as blood glucose meters. This device is an analog front end designed for high precision. Its key advantage is the use of 16-bit low noise analog-to-digital converter (ADC), industry standard ARM? Cortex? -M3 processor; low leakage current and low dynamic power for ultra-low power operation (standby current "26 μA, sleep current ~750 nA", extended battery life; key onboard functions including memory, integrated with error correction control ( ECC) functional flash memory to ensure high flash reliability, on-chip USB support, optimized high integration to reduce bill of materials (BOM) overhead; configurable front end, OEM can use it for a variety of products, including blood glucose meters , heart rate monitors and health monitoring equipment.
Figure 1: Block diagram of the Q32M210 32-bit MCU providing ultra-low power consumption, precision mixed signal processing and high reliability
The Q32M210 uses a more sophisticated blood glucose level calculation. In addition to extending battery life, it can perform more blood glucose tests before battery replacement. It can also reduce system complexity, reduce external component requirements, and support PCB design with smaller form factor. Smaller blood glucose meters, while reducing the number of external components also reduces system cost.
In terms of product development, the Q32M210 is flexible enough to implement programmable gain amplifiers, configurable sample rates, and three 10-bit DACs with integrated low-conductivity through software-configured analog front-end and digital-to-analog converters (DACs). Impedance switch. The device can be customized, does not require new external circuitry to match the new strip type, and is compatible with a wide range of sensor types. Existing Cortex-M3 applications can be easily ported to the Q32M210, simplifying software development. Easy integration, standardization, and connectivity also exemplify design flexibility; development support includes an evaluation and development kit (EDK), firmware library, and code examples.
As can be seen from the Q32M210 application example, the traditional architecture blood glucose meter is accurate, simple, but inflexible, the overall semiconductor BOM cost is about 5.75 US dollars (5 million in batches, the same below); and the optimized structure of the blood glucose meter is extremely accurate And rugged features, and can be reconfigured (supporting advanced indicator development), with an overall semiconductor BOM cost of approximately $4.50.
Figure 2: Traditional architecture (left) vs. optimized architecture (right) vs. blood glucose meter, green part using ON Semiconductor's device
2) DSP system solution for hearing aids
In 2012, the world expects to sell nearly 12 million hearing aids, driven by an aging population, longer life expectancy, lower birth rates; rising incomes in emerging markets (China, India, Brazil and Eastern Europe); transitional noise, diabetes, ototoxicity ( Some prescription drugs have side effects) and the spread of hearing loss caused by diseases.
A case study on the current state of hearing health in China shows that more than 10 million adults in China suffer from hearing loss, and only 1% of hearing loss patients use hearing aids (16% in Europe and 25% in the US). Studies in the United States have shown that 12.5% ​​of children and adolescents between the ages of 6 and 19 have permanent hearing impairment due to excessive noise, and studies in urban areas in China have shown similar results.
Hearing aids are mainly divided into Behind The Ear (BTE) and In the Ear (ITE), which are suitable for patients of different ages and needs. The former has traditional BTE, micro BTE and Receiver In Canal (RIC); the latter has full, 3/4, half-ear cavity ITE, ear canal built-in, deep ear canal (Completely In the Canal, CIC) And invisible In Canal (IIC) and other types. There are three trends: one is discrete and “invisibleâ€, the smaller ear canal built-in receiver (RIE) and the new invisible ear canal (IIC) type are more popular when the “baby boomer†generation in the United States begins to use hearing aids; The second is wireless communication and connectivity: the current technology is 2.4 GHz, 900 MHz and Near Field Magnetic Induction (NFMI) with Bluetooth relay; the third is fully automated and "smart", volume control and signal processing automatically adapt to the sound environment, thus More effective and more convenient for users. Meeting these trends requires a transfer to a 65 nm or smaller node process and miniaturized packaging technology; interoperability and advanced packaging techniques are required; processing power and algorithm complexity are increased. The design challenge that comes with it is that the current consumption when the power consumption is about 1 V, the multi-chip and chip area is less than 10 mm2, and the mixed signal technology is adopted.
As can be seen from Figure 3, the green portion is a device supplied by ON Semiconductor. Its system-in-package (SiP) simplifies the assembly process of miniature hearing aids and is suitable for all hearing aid type hearing aids.
Figure 3: Hearing aid block diagram
ON Semiconductor offers pre-configured DSP systems for wireless hearing aid applications, including the Ayre SA3291 hybrid module and the AYRE relay reference design. These pre-configured DSP systems offer a variety of hybrid options and feature packs to support all hearing aid product types, making them ideal for hearing aid manufacturers that require minimal programming and require application.
Among them, ON Semiconductor's Ayre SA3291 hybrid module uses a complete hearing aid algorithm suite, pre-configured hearing processor and NFMI high-bandwidth integrated duplex radio. The antenna is the only external component required and can synchronize left and right ear parameters. . And the Ayre Transit reference design from ON Semiconductor supports stereo audio streaming, Bluetooth, volume control and program selection.
ON Semiconductor's hearing aid digital signal processing software has several distinct features, such as wide dynamic range compression, which softens the sound without making the increased sound uncomfortable, providing individualized customization for individual hearing loss The feedback canceller eliminates some of the hearing aid output signals generated by the feedback and is adaptively eliminated by phase cancellation; the adaptive direction automatically adapts to the polarity mode, adjusts according to the noise position; continuously analyzes the sound environment using the environmental classification, and automatically adjusts Hearing aids maximize comfort and audibility.
Figure 4: Schematic diagram of wireless hearing aid application
To facilitate the design of engineers, ON Semiconductor also provides software development tools (online tools) to help select and configure algorithms, create custom hearing aids, model electroacoustic characteristics, test algorithms, fine-tuning, and more. If the customer develops the fitting software, the interface communication library file can be provided; if the customer does not have the fitting software, the customization of the fitting software can be provided. Hardware development tools include DSP programmers and development boards.
In addition to the pre-configured DSP solution, ON Semiconductor also offers Ezairo for hearing aid applications? The 5900 Series is an open programmable DSP system. This DSP system offers a highly customizable mix of configuration options that are ideal for developing hearing aid manufacturers that have their own innovative algorithms or apply fully custom algorithms from third-party vendors.
in conclusion
In order to meet the needs of family health and people's increased interest in health and wellness equipment, ON Semiconductor provides a variety of semiconductor solutions for medical applications in the Chinese market, including high performance and high precision for portable sensing devices such as blood glucose meters. The highly reliable Q32M210 32-bit mixed-signal microcontroller for pre-configured DSPs and open programmable DSP systems for hearing aids helps Chinese medical electronics manufacturers develop innovative high-precision, high-reliability and low-energy medical devices. At the same time, ON Semiconductor also provides supporting software and hardware development tools to assist customers in the development of two-time development of chip products, as well as an application engineering team to provide on-site support for customers to help them shorten the design cycle and speed up product launch.
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