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16bit AFE touts industry's best noise performance

30 Nov 2012

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Analog Devices Inc. (ADI) has announced what it describes as a highly integrated digital X-ray analogue front end (AFE) delivering the industry's lowest noise performance in multiple power-mode options and the highest image quality. The company added that 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 16bit ADCs.

With a noise figure of an equivalent charge of 560 electrons at a 2pC full-scale range, the ADAS1256 enables high resolution digital X-ray images while reducing patient exposure to X-ray dose. The device has multiple functional power modes ranging from 1-3mW/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.

All converted channel results from the ADAS1256 are output on a single low-voltage differential signalling (LVDS) self-clocked serial interface. The device 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.

The ADAS1256 is available for $256 in quantities of 1000 units.

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