In recent years, China's population aging problem has intensified, and people's life expectancy is longer. According to data from the United Nations and other agencies, the proportion of China ’s population over 60 years of age has increased from 8.9% in 1990 to 12.3% in 2012, and will reach 24.4% by 2030. At the same time, the incidence of heart disease, diabetes, asthma and even hearing impairment has increased. This has made people pay more attention to health care issues and brought greater development momentum to the consumer medical market. At the same time, the Chinese government plans to achieve universal medical insurance by 2020, which is conducive to promoting the sustainable development of the medical equipment industry.
In this context, consumer medical equipment tends to increase "intelligence" and data storage capabilities, and portability is also stronger, while wireless / connected medical equipment is also conducive to achieving convenient long-term patient monitoring, not to mention the latest body area The Internet is also rising. This makes semiconductor products used in the medical market tend to have higher integration, miniaturization, and high energy efficiency, using standard components and embedded wireless functions.
At present, China's medical device market is continuing to develop steadily, but the market is fragmented and is dominated by a few large medical device companies. At the same time, there are many smaller companies developing innovative medical solutions.
ON Semiconductor's value and solutions for China's consumer medical market
ON Semiconductor provides multiple values ​​for the Chinese consumer medical market, enabling medical technology developers to overcome their unique design challenges with high-performance silicon solutions. First of all, ON Semiconductor provides a rich product lineup for the Chinese consumer medical market, covering hearing aid digital signal processor (DSP) systems, custom mixed-signal application specific integrated circuits (ASICs), discrete components, and systems that help miniaturize the system Advanced mixed process packaging.
Secondly, ON Semiconductor has extensive medical expertise, technology and experience, including more than 30 years of experience in custom silicon chips (including high-reliability implant applications), has served the hearing aid industry since the early 1970s, and has rich intellectual property rights (IP ) Lineup, fully certified and robust development process and skilled system architect.
Third, ON Semiconductor provides the quality, reliability and commitment required by the medical market. ON Semiconductor provides long-term processes and products, with the extension of product life cycle, also provides traceability and long-term data retention, batch acceptance testing (LAT), reliability and failure analysis laboratory, ISO 13485 medical system quality certification.
Figure 1: ON Semiconductor's key medical applications and related products and services.
ON Semiconductor's medical application solutions mainly include implant medical devices (such as nerve stimulators, defibrillators and cardiac pacemakers), hearing health (hearing aids, cochlear implants), clinical and designated equipment (blood glucose monitoring, transdermal delivery Medicine, portable and point-of-care (PoC) patient monitoring), etc., see Figure 1.
ON Semiconductor consumer medical application case study
ON Semiconductor provides a rich product lineup for consumer medical applications. The following will focus on case studies focusing on hearing aids and medical ASIC applications.
1) Hearing aid case study
According to statistics, more than 10 million adults in China suffer from hearing impairments, and hearing aids are urgently needed to improve the hearing experience. Hearing aids mainly include Behind-The-Ear (BTE) and In-The-Ear (ITE). BTE hearing aids include traditional BTE, micro BTE and other different types, of which micro BTE has evolved into the ear canal built-in receiver (RIC) type.
Traditional BTE hearing aids are large in size. All components are built into the housing. Customized and fitted ear molds are used to ensure acceptable sound. However, a large battery is required to provide high power, so it will cause a wearing burden. The shell of ITE hearing aids is smaller than traditional BTE hearing aids. All the components are placed in it, but its battery size is small, which limits the output power and will be uncomfortable to wear for a long time. Relatively speaking, the miniature BTE case is small and elegant, and can be hidden behind the ear, while the receiver is just placed in the ear canal. This hearing aid battery has a small size and can also support long use time; and because it is close to the ear canal, it provides excellent sound effects.
Figure 2: Development trends of hearing aids and ON Semiconductor ’s Rhythm R3710 DSP system for micro BTE hearing aids
ON Semiconductor provides a complete digital signal processing hybrid system solution Rhythm R3710 for micro BTE hearing aids. The device uses the industry's smallest system-in-package (SiP) that complies with the RoHS directive, measuring only 4.57 x 3.12 x 1.52 mm, which is 25% smaller than traditional hybrid modules. This hybrid system package includes a digital signal processor (DSP), EEPROM, analog front end, radio frequency chip, and passive components that process voice algorithms. Other ICs can also be integrated as required (see Figure 3). The integrated 24-bit DSP provides more than 50 MIPS of computing power and current consumption of less than 700 μA during 1.2 V operation. This SiP is suitable for all types of hearing aids, including micro BTE hearing aids, and can help overcome major electroacoustic challenges in hearing aid assembly.
In addition to providing ultra-small size, high integration and advanced voice processing, Rhythm R3710's other key features or advantages include: integrated iSenseDetect environment classification algorithm (automatically adjusts the hearing aid according to the environment, no memory selection switch is required), ultra-low energy consumption (1 10 The battery is normally used for 10 days), adaptive noise reduction (improving voice clarity in noisy environments), 16-band tone equalization (flexibly adjusting frequency response, optimizing sound quality), 8-channel compressor, adaptive feedback cancellation ( Increase the adaptation speed) etc. ON Semiconductor also provides a full set of software support, ARK software is easy to integrate into existing fitting software.
Figure 3: ON Semiconductor's industry's smallest hybrid system package (SiP) integrates many components such as DSP die, EEPROM and so on.
ON Semiconductor provides a broad lineup of DSP system solutions for hearing aid applications, covering two types to meet customers' different application needs. One is pre-configured, pre-configured with ON Semiconductor ’s audio processing algorithm. Related products include Rythm R3710, Ayre SA3291, Rhythm R3910, Rhythm SB3229, Rhythm SB3231, CONSOLIDAT GA3227 and FOUNDATION GA3216, etc. , Allows users to use their own audio processing algorithms, products include EZAIRO 5900 series.
2) Customized medical ASIC case study
Various factors have led to the need for customized ASICs for medical equipment rather than standard discrete component solutions. The first is low energy consumption. Battery-powered medical devices require longer use time. The use of standard discrete components may consume too much current and cannot provide satisfactory product life time. In comparison, ASIC solutions provide the advantage of low energy consumption. Second is the small size. Medical devices often require small size to provide discreteness and comfort. The use of standard components may make the form factor too large, and the ASIC solution provides small size advantages with high integration.
The third is high pressure. Sensors for medical applications may require high voltage bias while generating extremely low level signals. When using discrete components to handle high and low voltages, the sensor interface circuit is usually too complicated and too large; and ASIC solutions can integrate high and low voltage circuits. Four is low noise. The signal captured by a dedicated human sensor for medical applications is extremely weak and should provide a low-noise environment. When using standard discrete components, leakage current or other undesired currents will press the signal generated by the sensor; and the ASIC solution provides a high degree of signal channel isolation and low noise. Fifth, long product life cycle. The product life cycle of medical equipment may exceed 10 years, many standard components have been eliminated before the end of the medical equipment production line, and reputable ASIC suppliers such as ON Semiconductor can cooperate with long medical product life cycles. Sixth, low BOM cost. If the number of components in a system with discrete components is too large, the cost will be high; ASIC provides an integrated solution to reduce system costs.
Taking the application of continuous blood glucose monitoring (CGM) as an example, many diabetic patients use CGM to continuously monitor blood glucose levels. In this application, the signal generated by the sensor is pA level. Due to leakage current, the signal generated by the sensor may not be collected using a discrete scheme. This application requires ESD protection greater than 2 kV without leakage current effects, which cannot be achieved using standard ESD protection mechanisms. In addition, the sensor size must be extremely small, and the discrete solution may be too large. Not only that, this type of application requires that the battery can be used for at least 6 months, and the current consumption of the discrete solution may be too large, shortening the product life cycle.
Therefore, such applications require custom ASICs. The CGM sensor interface ASIC provided by ON Semiconductor provides multiple advantages to meet application requirements. For example, this ASIC's proprietary analog / digital conversion solution can capture pA-level current while operating at extremely low power consumption. It also uses a proprietary low leakage current semiconductor process (C3), uses low leakage current ESD protection pads, and the ASIC size is less than 5 mm2, which does not affect the overall product size. Its energy consumption is also extremely low, with an average current consumption of less than 3 μA.
Figure 4: ON Semiconductor uses proprietary semiconductor processes and innovative IP designs to overcome the challenges of blood glucose sensor interfaces.
This medical customized ASIC is just one example of ON Semiconductor's rich medical customized ASIC lineup. ON Semiconductor currently provides ASICs for CGM applications, as well as blood gas analyzers, electrocardiogram (ECG) patient monitoring systems, key indicator monitoring, heart rate monitors, pulse oximeters, and automatic external defibrillators (AED). Custom ASIC. Customers of this type of medical applications face multiple challenges, such as the need for lower power and smaller size, requiring interfaces for proprietary sensors, but the interface requirements for proprietary sensors cannot usually be met with standard components. ON Semiconductor provides customized ASIC solutions that satisfy customers with size, power, and cost. It also provides standard ARM cores, and provides modular services and complete solutions.
Figure 5: ON Semiconductor has a rich lineup of high-performance, low-power ASIC IP.
ON Semiconductor has more than 30 years of experience, expertise and technology in the design and manufacture of complex ASICs for medical applications. The ASIC cooperation model with customers mainly includes concept definition, product planning, product development, product qualification verification and product release. Process. In China, ON Semiconductor has also accumulated successful medical ASIC cases, including the development of custom ASICs for Mindray for a variety of patient monitoring equipment, such as multi-channel electrocardiographs, heart rate and respiratory monitors, and blood oxygen saturation (SpO2 ) Instrument etc. Mindray will release more products using this ASIC in the future.
to sum up:
China's consumer medical device market is continuing to develop steadily. Medical device manufacturers need high-performance, high energy efficiency, low energy consumption, small size and long life cycle semiconductor solutions to help them develop innovative products to meet the growing needs of users. ON Semiconductor provides multiple values ​​for China's consumer medical device market, including digital signal processor (DSP) systems for hearing aids, custom mixed signal application specific integrated circuits (ASICs), discrete components, and advanced packaging to help miniaturize the system The rich product lineup, rich medical expertise, technology and experience, as well as the quality, reliability and commitment to meet the strict requirements of the medical market. This article also takes hearing aid DSP and customized medical ASIC as examples to analyze the unique advantages of these products and the unique value they can provide to customers, helping customers develop innovative medical products.
Contributed by ON Semiconductor
Reference materials:
ON Semiconductor hearing DSP system series PowerSoluTIons / parametrics.do? id = 101769
Rhythm R3710 DSP Hybrid System Data Sheet
Collateral / R3710-D.PDF
ON Semiconductor Medical Solutions Brochure
Collateral / BRD8081-D.PDF
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