2.5-GSPS, 11-bit DAC supports 20 times higher QAM channel density
The AD9737A 2.5-GSPS D/A converter’s wide bandwidth and dynamic range enable cable infrastructure designers to increase QAM (quadrature amplitude modulation) channel density by 20 times over present cable modem implementations, enabling improved next-generation services such as interactive television, high-definition broadcasts and new speciality channels.
The AD9737A features low noise and intermodulation distortion to enable high quality synthesis of wideband signals up to 1 GHz, reducing the number of transmit DACs required in the typical cable plant. The device operates from 1.8-V and 3.3-V supplies for a total power consumption of 1.1 W maximum.
The AD9737A benefits from a dual-port interface with double-data-rate LVDS data receivers that support the maximum conversion rate of 2.5 GSPS. A proprietary switching technique enhances dynamic performance. The devices output current is programmable from 8.7 mA to 31.7 mA adding flexibility in interface options.
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