Analog Devices' 16-bit SAR ADC handles 10 Msamples/s
-- Test & Measurement World, 7/23/2008 10:10:00 AM
Analog Devices has expanded its PulSAR family of 16-bit successive-approximation register (SAR) ADCs with the addition of the AD7626, a device that achieves 16-bit data capture with 15-bit ENOB (effective number of bits) and 10-Msample/s throughput—2.5 times faster than other SAR ADCs, according to the manufacturer.
Analog Devices also claims that, unlike other ADCs which operate at lower speeds or reach higher sample rates by increasing power consumption and trading off AC and DC performance, the AD7626 has a 92-dB signal-to-noise ratio that is 8 dB (1.3 bits) better than any ADC, regardless of architecture. For applications that do not require full 10-Msample/s data rates, the AD7626 can be easily multiplexed. For example, you could use the device in a two-channel configuration where each channel operates at 5 Msamples/s.
The converter consumes just 130 mW of power and comes in a compact 5x5-mm, 32-lead QFN package. It uses a self-clocked low-voltage differential serial (LVDS) bus that provides a low-noise interface and reduces the number of external components required to address board-level noise concerns.
In addition to the AD7626, Analog Devices introduced the AD7625 16-bit PulSAR ADC, which operates at 6 Msamples/s and expands the PulSAR family to 15 devices with speed options ranging from 1 Msample/s to 10 Msamples/s and dynamic range of 16 bits to 18 bits. The AD7625 is housed in a 32-lead QFN package.
In lots of 1000 units, the AD7626 costs $34 and the AD7625 costs $32.
