AD9122

Dual, 16-Bit, 1230 MSPS, TxDAC+ Digital-to-Analog Converter AD9122 FEATURES Flexible LVDS interface allows word, byte, or nibble load Single-carrier W-CDMA ACLR = 82 dBc at 122.88 MHz IF Analog output: adjustable 8.7 mA to 31.7 mA, RL = 25 Ω to 50 Ω Integrated 2×/4×/8× interpolator/complex modulator allows carrier placement anywhere in the DAC bandwidth Gain, dc offset, and phase adjustment for sideband suppression Multiple chip synchronization interfaces High performance, low noise PLL clock multiplier Digital inverse sinc filter Low power: 1.5 W at 1.2 GSPS, 800 mW at 500 MSPS, full operating conditions 72-lead, exposed paddle LFCSP APPLICATIONS Wireless infrastructure W-CDMA, CDMA2000, TD-SCDMA, WiMAX, GSM, LTE Digital high or low IF synthesis Transmit diversity Wideband communications: LMDS/MMDS, point-to-point GENERAL DESCRIPTION The AD9122 is a dual, 16-bit, high dynamic range digital-toanalog converter (DAC) that provides a sample rate of 1230 MSPS, permitting multicarrier generation up to the Nyquist frequency. The AD9122 TxDAC+® includes features optimized for direct conversion transmit applications, including complex digital modulation, and gain and offset compensation. The DAC outputs are optimized to interface seamlessly with analog quadrature modulators, such as the ADL537x F-MOD series from Analog Devices, Inc. A 4-wire serial port interface provides for programming/readback of many internal parameters. Full-scale output current can be programmed over a range ...