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DACs support high-fidelity digital synthesis

Posted: 20 Mar 2009 ?? ?Print Version ?Bookmark and Share

Keywords:DACs 14bit? synthesis digital? 3.6GHz signals?

Analog Devices Inc. has introduced a pair of 14bit DACs that perform direct digital synthesis for signals up to 3.6GHz.

The AD9789 and AD9739 DACs are part of ADI's TxDAC family of transmit DACs and feature its proprietary Mix-Mode super-Nyquist architecture, which supports high-fidelity digital synthesis of RF signals up to 3.6GHz.

The design allows broadband and next-generation wireless equipment designers to use one transmit DAC architecture for multiple communications standards. In addition, the devices eliminate an off-chip mixer and low-pass filter to reduce design complexity, cost, size and power in broadband-communication systems.

The AD9789 14bit TxDAC integrates a QAM encoder, interpolator and digital up-converter that achieve a 2.4GHz sample rate for cable infrastructure. The 2.5GHz AD9739 exploits the same DAC core and features what the company says is the industry's widest useable input bandwidth.

In 1K quantities, AD9739 in a 160-Ball CSBGA is $43.69; AD9789 in a 164-Ball CSBGA is $53.10. These products are now available in volume production.

- Ismini Scouras

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