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16-bit, dual ADC flaunts high-res data capture

Posted: 03 Aug 2010     Print Version  Bookmark and Share

Keywords:ADC  data acquisition  medical imaging  low SNR  high-resolution 

Analog Devices, Inc. (ADI) debuts the AD9650, a dual 16-bit 25MSPS/65MSPS/80MSPS/105MSPS (mega samples per second), ADC (analogue-to-digital converter) designed for digitizing high frequency, wide dynamic range signals with input frequencies of up to 300MHz. It suits high-performance data acquisition systems in medical imaging, industrial, spectrum analysis, multi-mode radio and radar applications. The AD9650 ADC boasts 328mW per channel power consumption, which is half that of competing data converters while offering an industry best SNR (signal-to-noise ratio) figure of 82dBFS and SFDR (spurious-free dynamic range) performance of 90dBc with a 30MHz input.

"In the medical imaging arena, our customers are constantly striving for higher resolution image capture that improves patient diagnostics," said Patrick O'Doherty, vice president for the Healthcare Group, Analog Devices. "The AD9650 helps our customers achieve that goal by allowing medical equipment designers to increase imaging channel densities while still maintaining system-critical low noise and power requirements."

Available in a compact 9mm x 9mm package, the AD9650 provides flexibility for engineers using proprietary differential inputs at frequencies up to 300MHz and includes an on-chip dither option for improved SFDR performance with low signal level analogue inputs. The ADC is pin-compatible with ADI's previously release dual ADCs, including the AD9268 16-bit 125MSPS, AD9251 14-bit 80MSPS and the AD9269 16-bit 80MSPS, allowing system engineers to raise the performance of their data acquisition systems without changing the board layout.

The AD9650 operates from a single 1.8V supply and a separate digital output driver supply, accommodating 1.8V CMOS or LVDS outputs. The AD9650 is also available in speed grade options of 80MSPS, 65MSPS and 25MSPS.

As part of a complete signal chain, the AD9650 can be used with amplifiers, VGAs and clock drivers such as the ADL5562 3.3GHz ultra-low distortion RF/IF differential amplifier, ADA4937-2 ultra-low distortion differential ADC driver, AD8372 programmable dual VGA, AD9510 clock distribution IC and AD9520 CMOS output clock generator with integrated VCO.

The 16-bit ADC is available in a 64-lead LFCSP. The price per 1,000 units is as follows: AD9650 105MSPS is priced at Rs.5.720.53 ($122.50); AD9650 80MSPS is priced at Rs.4,903.31 ($105.00); AD9650 65MSPS is priced at Rs.4,086.09 ($87.50) and the AD9650 25MSPS is priced at Rs.2,451.65 ($52.50). Samples are available now.

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