MRI (Nuclear Magnetic Resonance Imaging) scans can provide particularly clear images of the human body and are often used to diagnose a wide variety of diseases and injuries, such as Alzheimer's disease, tumors, and ligament tears. Analog Devices, Inc., a leading global provider of data conversion technology and a long-term collaborator in the medical imaging industry, recently announced that it has made breakthrough progress in the field of data conversion, helping to provide ultra-clear images for clinicians and radiologists Help them see smaller anatomical structures and lesions than before, such as breast cancer cells. ADI's AD5791 high-precision 20-bit digital-to-analog converter (DAC) is the industry's first DAC device with true 1ppm (parts per million) resolution and accuracy. Its accuracy and resolution are 4 times higher than similar converters. 1ppm analog system design usually faces complex engineering and technical challenges, requiring the integration of multiple lower resolution DACs and a large number of discrete devices with supporting ICs, accompanied by considerable development risks and costly modification times, In order to optimize circuit parameters, reduce errors and design complex automatic calibration circuits. AD5791 has a resolution and accuracy of 1ppm, low noise (less than 1ppm), fast refresh rate (1us) and very low output drift (below 1ppm), which can greatly simplify design tasks, reduce development costs and reduce risks. In the MRI system, this breakthrough technology not only improves the image quality, but also can accurately control the magnetic gradient in high magnetic field strength applications, thereby achieving ultra-high image resolution and contrast. After using the AD5791 with low noise, low drift and high linear performance, the MRI system is frequently taken offline due to the system calibration cycle, effectively extending the working time of the MRI system. The new converter also reduces the need for complex calibration algorithms, thereby reducing engineering and system maintenance costs. In addition to the MRI system, other applications suitable for the AD5791 include: test and measurement systems, high-end scientific and aviation instruments, communication equipment, and industrial control systems. The enhancement of data conversion performance can help imaging system designers improve image clarity and speed up the diagnosis of early diseases by doctors, so as to achieve timely treatment. The AD5791 DAC provides exceptionally low noise performance and reduces image artifacts, thus reducing the need for multiple MRI scans. In addition, the lower image error rate and higher reliability can ensure that more patients are treated efficiently in a shorter time. There are more than 60 million MRI examinations completed each year worldwide. MRI is a non-invasive technique that does not require ionizing radiation to obtain images of the human body, so it is ideal for diagnosing various injuries and symptoms, and MRI can appropriately adjust the examination content to meet special imaging parameters (such as the observation area) Requirements. "The AD5791 establishes new benchmarks for image clarity, resolution, and contrast in medical imaging systems—this is the system design requirements necessary to ensure that radiologists diagnose patients quickly and accurately." Patrick, Vice President of Healthcare, Analog Devices O'Doherty said. "For system architects, a performance level of 1 ppm makes a monolithic DAC architecture possible, which can effectively reduce the design size and cost. This means that for the first time, designers have the opportunity to release most of the system error budget, saving Resources can be used for key components in other subsystems, or to improve overall MRI performance. " The 20-bit AD5791 provides a relative accuracy index of up to ± 1 LSB, and can guarantee monotonic output under the maximum ± 1 LSB DNL index. The AD5791 has low-frequency noise of 0.025ppm and output drift of 0.05ppm / C. The output range can be configured as standard unipolar (+ 5V, + 10V) or bipolar (± 5V, ± 10V) voltage. The AD5791 uses a universal three-wire serial interface, and its operating clock rate can reach 50MHz. The AD5791 DAC is the latest example of Analog Devices providing cutting-edge technology for medical imaging systems. Other medical devices recently released by ADI include: ADAS1128 24-bit current-to-digital converter, ADuM4160 single-chip USB isolator (universal serial bus isolator), and AD927x series 8-channel receiving front end for ultrasound systems. These products, as well as our other devices, represent the most extensive IC product portfolio developed by Analog Devices specifically for the healthcare imaging market today. With the intensification of China's aging population, the improvement of medical conditions, and the promotion of favorable factors such as the Chinese government's large-scale investment in the healthcare industry, the demand for the Chinese electronic medical market, especially the high-end medical electronic market, continues to grow. These high-end medical equipment for hospitals and professional medical institutions, such as computed tomography (CT), magnetic resonance imaging (MRI), and X-ray equipment, are in strong demand and will inevitably lead to the further development and prosperity of medical electronic technology. For the high-end medical equipment market, leading foreign medical device suppliers are now also facing competition and chasing from local companies. It is the advantage of maintaining competitiveness by setting up R & D centers in China and introducing excellent talents to improve R & D capabilities in the Chinese market As a leading supplier in the field of medical electronics, ADI will always adhere to the fundamental goal of improving people's lives and is committed to providing excellent Chinese medical IC product services. 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