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16位160 MSPS 2/4/8位TxDAC系列+®插值双D/A转换器AD9777数据表
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The AD97771 is the 16-bit member of the AD977x pin compatible， high performance， programmable 2×/4×/8× interpolating TxDAC+ family. The AD977x family features a serial port interface （SPI） that provides a high level of programmability， thus allowing for enhanced system level options. These options include selectable 2×/4×/8× interpolation filters; fS/2， fS/4， or fS/8 digital quadrature modulation with image rejection; a direct IF mode; programmable channel gain and offset control; programmable internal clock divider; straight binary or twos complement data interface; and a singleport or dual-port data interface. The selectable 2×/4×/8× interpolation filters simplify the requirements of the reconstruction filters while simultaneously enhancing the TxDAC+ family’s pass-band noise/distortion performance. The independent channel gain and offset adjust registers allow the user to calibrate LO feedthrough and sideband suppression errors associated with analog quadrature modulators. The 6 dB of gain adjustment range can also be used to control the output power level of each DAC.
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