AD9779BSVZ

AD9779 is a dual, 16bit, high dynamic range, digital-to-analog converter (DAC) that provide a sample rate of 1GSPS, permitting multicarrier generation up to the Nyquist frequency. It includes features optimized for direct conversion transmit applications, including complex digital modulation, and gain and offset compensation. The DAC output is optimized to interface seamlessly with analog quadrature modulators such as the AD8349. A serial peripheral interface (SPI®) provides for programming/readback of many internal parameters. Typical applications include Wireless infrastructure (WCDMA, CDMA2000, TD-SCDMA, WiMax, GSM), digital high or low IF synthesis, internal digital upconversion capability, transmit diversity, wideband communications: LMDS/MMDS, point-to-point.

• Low power of 1.0W at 1GSPS, 600mW at 500MSPS, full operating conditions
• SFDR is 82dBc at fDAC = 100MSPS, fOUT = 20MHz
• Single carrier WCDMA ACLR = 79dBc at fDAC = 491.52MSPS, fOUT = 100MHz
• Analog output is adjustable 8.7mA to 31.7mA, RL = 25 to 50 ohm
• Novel 2×, 4×, 8× interpolator/coarse complex modulator allows carrier placement anywhere in DAC BW
• Auxiliary DACs allow control of external VGA and offset control
• Multiple chip synchronization interface
• High performance, low noise PLL clock multiplier and digital inverse sinc filter
• 100 lead TQFP-EP package
• Operating temperature range from -40°C to 85°C

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party