The AD9148 is a quad, 16-bit, high dynamic range, digital-toanalog converter (DAC) that provides a sample rate of 1000 MSPS. These devices include features optimized for direct conversion transmit applications, including gain, phase, and offset compensation. The DAC outputs are optimized to interface seamlessly with analog quadrature modulators such as the ADL5371/ADL5372/ ADL5373/ADL5374/ADL5375/. A serial peripheral interface (SPI) is provided for programming of the internal device parameters. Full-scale output current can be programmed over a range of 10 mA to 30 mA. The devices operate from 1.8 V and 3.3 V supplies for a total power consumption of 3 W at the maximum sample rate. They are enclosed in 196-ball chip scale package ball grid array with the option of an attached heat spreader.
- Single carrier WCDMA ACLR = 80 dBc @ 150 MHz IF
- Channel to Channel Isolation > 90dB
- Analog output: adjustable 8.7 mA to 31.7 mA, RL = 25 ohm to 50 ohm
- Novel 2×, 4× and 8x interpolator eases data interface
- On-chip fine complex NCO allows carrier placement anywhere in DAC bandwidth
- High performance, low noise PLL clock multiplier
- Multiple chip synchronization interface
- Programmable digital inverse sinc filter
- Auxiliary DACs allow for offset control
- Gain DACs allow for I and Q gain matching
- Programmable I and Q phase compensation
