CTSD ADCs deliver best frequency, dynamic range, and SNR combo
Parts optimizes bandwidth and resolution for wireless infrastructure, medical, and other high-performance equipment
The 16-bit single and dual AD9261/AD9262 continuous time sigma delta (CTSD) A/D converter and the AD9267 CTSD modulator are claimed to offer the industry’s lowest noise and high dynamic range of 86-dB with a bandwidth of up to 10 MHz. The highly integrated CTSD architecture eliminates multiple discrete components at the system level, while simultaneously improving performance and simplifying product development.
The parts offer a noise figure of 15 dB and SNR of 82.5 for the AD9261/AD9262 and 83 dB for the AD9267 while the 150 to 350-mW-per-channel power consumption is matched to a range of communications and industrial applications, including emerging radio architectures, such as direct down conversion, where the dual AD9262 or AD9267 can be used to support multiple wireless carriers and standards simultaneously.
The highly integrated AD9261 and AD9262 feature an on-chip PLL clock multiplier, decimation filters, and sample rate converters and provide flexible output data rates between 30 and 160 Msamples/s. The AD9267, which features only the high-performance 640-Msample/s modulator core and PLL clock multiplier, presents the high speed data directly to the output. This provides designers the flexibility to offload signal-processing functions to an FPGA or other processor. (Ea/1,000: AD9262, $30, AD9276, $40 — samples now, prod qty, April 2009.)
Analog Devices , Wilmington , MA
Technical Support 800-262-5643
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