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SAR ADC delivers greater level of speed and accuracy

Norwood, Mass. — Analog Devices, Inc. has expanded its PulSAR family of precision 16-bit successive-approximation register analog-to-digital converters (SAR ADCs) with a breakthrough in data conversion that is said to deliver an unequalled combination of speed and accuracy for advanced industrial and medical systems.

The AD7626 PulSAR ADC achieves a new level of 16-bit data capture performance, with best-in-class 15-bit effective number of bits (ENOB) and 10 million samples per second (MSPS) throughput, which is 2.5 times faster than other SAR ADCs, said ADI. Unlike other ADCs, which operate at much lower speeds or reach higher sample rates by increasing power consumption and trading off ac and dc performance, the AD7626 PulSAR ADC touts a 92-dB SNR (signal-to-noise ratio) that is 8 dB (1.3 bits) better than any ADC, regardless of architecture.

For applications that don't require full 10-MSPS data rates, the AD7626 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. This would allow the system designer to lower materials costs by reducing data converter component count by 50 percent, while still maintaining speeds that are 25 percent faster than existing solutions, said ADI.

Housed in a 5 x 5-mm quad flat no-lead (QFN) package that is 70 percent smaller than competing offerings, the AD7626 consumes just 130 mW of power, which even at its highest sample rate is 15 percent lower than other ADCs in its class, said ADI. The AD7626 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.

The AD7626 (32-lead QFN package) is priced at $34 each and the AD7625 (32-lead QFN package) at $32 each, both in quantities of 1,000.
Availability: The AD7626 and AD7625 PulSAR ADCs are available now in production quantities.
Product information: AD7626, PulSAR ADC evaluation tools, and ADC selection guide

Analog Devices Inc. , www.analog.com

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