Analog Devices

TheAD9785/AD9787/AD9788are 12-bit, 14-bit, and 16-bit, high dynamic range TxDAC®devices, respectively, that provide a sample rate of 800 MSPS, permitting multicarrier generation up to the Nyquist frequency. Features are included for optimizing direct conversion transmit applications, including complex digital modulation, as well as gain, phase, and offset compensation. The DAC outputs are optimized to interface seamlessly with analog quadrature modulators, such as the ADL5375 family from Analog Devices, Inc. A serial peripheral interface (SPI) provides for programming and readback of many internal parameters. Full-scale output current can be programmed over a range of 10 mA to 30 mA. The AD9785/AD9787/AD9788 family is manufactured on a 0.18 μm CMOS process and operates from 1.8 V and 3.3 V supplies. It is enclosed in a 100-lead TQFP package.Product HighlightsLow noise and intermodulation distortion (IMD) enable high quality synthesis of wideband signals from baseband to high intermediate frequencies.Proprietary DAC output switching technique enhances dynamic performance.CMOS data input interface with adjustable setup and hold.Low power complex 32-bit numerically controlled oscillators (NCOs).ApplicationsWireless infrastructureW-CDMA, CDMA2000, TD-SCDMA, WiMAX, GSMDigital high or low IF synthesisTransmit diversityWideband communicationsLMDS/MMDS, point-to-point

TheAD9785/AD9787/AD9788 are 12-bit, 14-bit, and 16-bit, high dynamic range TxDAC®devices, respectively, that provide a sample rate of 800 MSPS, permitting multicarrier generation up to the Nyquist frequency. Features are included for optimizing direct conversion transmit applications, including complex digital modulation, as well as gain, phase, and offset compensation. The DAC outputs are optimized to interface seamlessly with analog quadrature modulators, such as the ADL5375 family from Analog Devices, Inc. A serial peripheral interface (SPI) provides for programming and readback of many internal parameters. Full-scale output current can be programmed over a range of 10 mA to 30 mA. The AD9785/AD9787/AD9788 family is manufactured on a 0.18 μm CMOS process and operates from 1.8 V and 3.3 V supplies. It is enclosed in a 100-lead TQFP package.Product HighlightsLow noise and intermodulation distortion (IMD) enable high quality synthesis of wideband signals from baseband to high intermediate frequencies.Proprietary DAC output switching technique enhances dynamic performance.CMOS data input interface with adjustable setup and hold.Low power complex 32-bit numerically controlled oscillators (NCOs).ApplicationsWireless infrastructureW-CDMA, CDMA2000, TD-SCDMA, WiMAX, GSMDigital high or low IF synthesisTransmit diversityWideband communicationsLMDS/MMDS, point-to-point

The AD9804 is a complete Analog Front-End (AFE) product for low-cost CCD camera applications. It features the basic circuitry necessary to sample, condition, and digitize the analog output of interlaced and progressive scan area CCDs. The VGA gain is variable from 0 to 34 dB and is programmed through a 3-Wire serial digital interface.

The AD9824 is a complete analog signal processor for CCD applications. It features a 30 MHz single-channel architecture designed to sample and condition the outputs of interlaced and progressive scan area CCD arrays. The AD9824’s signal chain consists of an input clamp, a correlated double sampler (CDS),PxGA, a digitally controlled VGA, a black level clamp, and a 14-bit A/D converter. Additional input modes are also pro-vided for processing analog video signals.The internal registers are programmed through a 3-wire serial digital interface. Programmable features include gain adjustment, black level adjustment, input configuration, and power-down modes.The AD9824 operates from a single 3 V power supply, typically dissipates 153 mW, and is packaged in a 48-lead LFCSP.

This DDS device is a numerically controlled oscillator employing a phase accumulator, a sine look-up table and a 10-bit D/A converter integrated on a single CMOS chip. Modulation capabilities are provided for phase modulation and frequency modulation.Clock rates up to 50 MHz are supported. Frequency accuracy can be controlled to one part in 4 billion. Modulation is effected by loading registers through the parallel microprocessor interface.A power-down pin allows external control of a power-down mode. The part is available in a 48-pin TQFP package.