Norwood, Mass.Analog Devices Inc. has introduced a pair of 14-bit DACs (digital-to-analog converters) that perform direct digital synthesis for signals up to 3.6 GHz.
The AD9789 and AD9739 DACs are part of ADI's TxDAC family of transmit digital-to-analog converters, and feature its proprietary Mix-Mode super-Nyquist architecture, which supports high-fidelity digital synthesis of RF signals up to 3.6 GHz.
Their 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 14-bit TxDAC integrates a QAM encoder, interpolator, and digital up-converter that achieve a 2.4-GHz sample rate for cable infrastructure. The 2.5-GHz AD9739 exploits the same DAC core, and features what the company says is the industry's widest useable input bandwidth.
Analog Devices, www.analog.com