AD9146 Dual, 16-Bit, 1230 MSPS, TxDAC+® Digital-to-Analog Converter
Product Details
The AD9146 is a dual, 16-bit, high dynamic range digital-to-analog converter (DAC) that provides a sample rate of 1230 MSPS, permitting multicarrier generation up to the Nyquist frequency.
The AD9146 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 3-wire serial port interface provides for programming/readback of many internal parameters. Full-scale output current can be programmed over a range of 8.7 mA to 31.7 mA. The AD9146 comes in a 48-lead LFCSP.
PRODUCT HIGHLIGHTS
- Ultralow noise and intermodulation distortion (IMD) enable high quality synthesis of wideband signals from baseband to high intermediate frequencies.
- A proprietary DAC output switching technique enhances dynamic performance.
- The current outputs are easily configured for various single-ended or differential circuit topologies.
- Compact LVDS digital interface offers reduced width data bus.
APPILICATIONS
- 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
Features and Benefits
- Flexible LVDS interface allows byte or nibble load
- Single-carrier W-CDMA ACLR = 80 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× 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: 1.2 W @ 1.0 GSPS, 800 mW @ 500 MSPS, full operating conditions
- 48-lead, exposed paddle LFCSP