制造商:ADI/AD
优势和特点
Low power: 1.0 W @ 1 GSPS, 600 mW @ 500 MSPS, full operating conditions
SFDR = 78 dBc to fOUT = 100 MHz
Single carrier WCDMA ACLR = 79 dBc @ 80 MHz IF
Analog output: adjustable 8.7 mA to 31.7 mA, RL = 25 Ω to 50 Ω
Novel 2×, 4×, and 8× interpolator/coarse complex modulator allows carrier placement anywhere in DAC bandwidth
Auxiliary DACs allow control of external VGA and offset control
Multiple chip synchronization interface
High performance, low noise PLL clock multiplier
Digital inverse sinc filter
100-lead, exposed paddle TQFP package
产品详情
The AD9776/AD9778/AD9779 are dual, 12-/14-/16-bit, high dynamic range, digital-to-analog converters (DACs) that provide a sample rate of 1 GSPS, permitting multicarrier generation up to the Nyquist frequency. They include 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 quad-rature modulators such as the AD8349. A serial peripheral interface (SPI®) provides for programming/readback of many internal parameters. Full-scale output current can be programmed over a range of 10 mA to 30 mA. The devices are manufactured on an advanced 0.18 μm CMOS process and operate on 1.8 V and 3.3 V supplies for a total power consumption of 1.0 W. They are enclosed in 100-lead TQFP packages.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.
CMOS data input interface with adjustable set up and hold.
Novel 2×, 4×, and 8× interpolator/coarse complex modulator allows carrier placement anywhere in DAC bandwidth.
Applications
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
Data Sheet, Rev. A, 3/07
标题 | 类型 | 大小(KB) | 下载 |
---|---|---|---|
AN-748: Set-Up and Hold Measurements in High Speed CMOS Input DACs (Rev. 0) | 812 | 点击下载 |
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