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Analog Devices ADAS1256 Digital X-ray Analog Front End (AFE) Integrates The Complete Charge-to-digital Conversion Signal Chain On A Single Chip, Enabling A Variety Of Digital X-ray Modalities Including Portable Systems. (Graphic: Business Wire)

Analog Devices, Inc., (NASDAQ: ADI), the leading provider of data conversion technology* and longtime collaborator to the medical imaging industry, today introduced a highly integrated digital X-ray analog front end (AFE) with the industry’s lowest noise performance in multiple power-mode options, and the highest image quality. The 256-channel ADAS1256 digital X-ray AFE is the industry’s first single-chip solution to integrate the complete charge-to-digital conversion signal chain by incorporating low-noise programmable-charge amplifiers, correlated double-sampling circuitry and 16-bit A/D converters. With a noise figure of an equivalent charge of 560 electrons at a 2-picocoulomb full-scale range, the ADAS1256 enables high resolution digital X-ray images while reducing patient exposure to X-ray dose. The ADAS1256 has multiple functional power modes ranging from 1-mW/channel to 3-mW/channel, allowing manufacturers to address a wide range of digital X-ray modalities including portable radiology and mammography as well as high speed fluoroscopy and cardiac imaging.

“Thanks to the ultra-low-noise profile and dynamic range of the ADAS1256, digital X-ray technology will continue to deliver better diagnostic image quality and reduce radiation dosage applied to patients compared to existing digital X-ray systems,” said Pat O’Doherty, vice president, healthcare group, Analog Devices. “By achieving this level of performance while adhering to a strict power budget, the ADAS1256 digital X-ray AFE provides medical equipment designers with a single device that serves the growing high-performance requirements of the portable digital X-ray market.”

About the ADAS1256 Digital X-Ray AFE

The ADAS1256 is a 256-channel, simultaneous sampling, high dynamic range, low power analog front end that is a complete charge-to-digital conversion signal chain. It incorporates 256 low noise integrators, low pass filters, and correlated double samplers that are multiplexed into a high speed, 16-bit, A/D converter. All converted channel results are output on a single LVDS (low-voltage differential signaling) self-clocked serial interface. The ADAS1256 can be programmed using an SPI-compatible daisy-chain serial interface. It is delivered on a high density system-on-flex (SOF) package and can be directly mounted on a digital X-ray panel.

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