Analog Devices expands low power data converter range
1 min read
Analog Devices has added 26 a/d converters to its low power data converter portfolio. The expansion includes what it claims are three data converter technology industry firsts for 16bit a/d converters: a dual device with quadrature error correction; a single channel part spanning 80 to 125 Msample/s; and the smallest single channel product, handling up to 80Msample/s.
Jon Hall, the company's strategic marketing and applications manager for high speed converters, described the move as a 'push into the 16bit sector'. ""There is growing interest in power consumption with a relaxation in performance. To meet this, we've added a QEC block. This block, along with the DC Offset Digital Processing block, helps with the mismatch between the rf and digital sides of direct conversion. Errors created in the rf side can be corrected in the digital domain."
Previously, said Hall, QEC was performed in an fpga. "This approach saves fpga fabric for other applications."
The dual channel AD9269 consumes 93mW per channel, a figure Analog Devices claims is 6.5 times lower than competing devices. The monolithic, dual channel 16bit converter is available in 20, 40, 65 and 80Msample/s variants, each featuring a high performance sample and hold circuit and on chip voltage reference. It also features QEC and DC offset digital processing blocks, which minimise errors produced in an I/Q receiver system dynamically.
Also unveiled are the AD9265, a single channel 125Msample/s 16bit converter drawing 370mW and the single channel AD9266, a low power part that supports resolutions ranging from 10 to 16bit.
