16-bit SAR ADC

6 August 2008 Analogue, Mixed Signal, LSI

Analog Devices has expanded its PulSAR family of precision 16-bit SAR ADCs with the new AD7626, which achieves 15-bit ENOB (effective number of bits) and 10 Msps (million samples per second) throughput, with a 92 dB SNR (signal-to-noise ratio).

The ability to process information at higher speeds while preserving data integrity is a key requirement in today's most advanced industrial and medical systems. For example, in medical MRI (magnetic resonance imaging) and digital X-ray systems, the speed and accuracy supported by the new PulSAR ADC enables medical procedures to be conducted more quickly and accurately, reducing the time patients must lie motionless during MRI examinations and reducing X-ray radiation exposure.

For applications that do not require full 10 Msps data rates, the device can be multiplexed. Some medical imaging devices, for example, could use the AD7626 in a two-channel configuration where each channel operates at 5 Msps.

Housed in a compact 5 x 5 mm QFN quad flat no-lead) package, the AD7626 consumes just 130 mW of power. It also uses a self-clocked low-voltage differential serial (LVDS) bus that provides a very low-noise interface and reduces the number of external components required to address board-level noise concerns.

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