Medical electronics market requires high performance ADC
Release date: 2008-08-22
In modern electronic systems, the bridge between the analog and digital worlds is often built using high-performance analog-to-digital conversion technology. In specialized fields such as medical electronics, the demands on data converters are even more rigorous—requiring high sampling rates, exceptional precision, minimal noise, low power consumption, cost-effectiveness, and compact packaging.
ADI’s recently launched Precision 16-bit Successive Approximation (SAR) ADC, the AD7626, is specifically designed for industrial and medical applications that require fast data processing while ensuring accuracy and reliability. It is particularly well-suited for use in medical imaging systems like magnetic resonance imaging (MRI) and digital X-ray equipment. By leveraging the speed and precision of PulSAR ADC technology, medical procedures can be carried out more efficiently, reducing both the time patients spend in MRI machines and their exposure to X-ray radiation.
The AD7626 delivers an impressive 15-bit effective number of bits (ENOB) and a 10-MSPS sampling rate, significantly outperforming other ADC architectures. It offers a 92-dB signal-to-noise ratio, which is 8dB (or 1.3 bits) higher than conventional designs. For applications that don’t require the full 10-MSPS speed, the AD7626 can be easily configured in a multiplexed mode. For instance, some medical imaging devices can operate it in a dual-channel setup, with each channel running at 5-MSPS, allowing system designers to cut the number of ADCs in half and reduce overall bill-of-material costs.
The AD7626 comes in a compact 5mm x 5mm LFCSP package, making it 70% smaller than comparable products and consuming just 130mW of power. Its self-synchronizing LVDS bus provides a low-noise interface and minimizes the need for external components, helping to reduce board-level noise and simplify design complexity.
As part of ADI’s PulSAR product family, the AD7626 is based on an ADC architecture that offers zero data latency—critical for precision data acquisition systems. This feature ensures that data is captured and processed without delay, enhancing the performance of real-time applications.
Source: Shanghai Medical Device Industry Association website
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