GENERAL DESCRIPTION
●The AD9958 consists of two DDS cores that provide indepen dent frequency, phase, and amplitude control on each channel. This flexibility can be used to correct imbalances between signals due to analog processing, such as filtering, amplification, or PCB layout related mismatches. Because both channels share
●a common system clock, they are inherently synchronized. Synchronization of multiple devices is supported.
●FEATURES
●2 synchronized DDS channels @ 500 MSPS
●Independent frequency/phase/amplitude control between channels
●Matched latencies for frequency/phase/amplitude changes
●Excellent channel-to-channel isolation (>72 dB)
●Linear frequency/phase/amplitude sweeping capability
●Up to 16 levels of frequency/phase/amplitude modulation (pin-selectable)
●2 integrated 10-bit digital-to-analog converters (DACs)
●Individually programmable DAC full-scale currents
●0.12 Hz or better frequency tuning resolution
●14-bit phase offset resolution
●10-bit output amplitude scaling resolution
●Serial I/O port interface (SPI) with 800 Mbps data throughput
●Software-/hardware-controlled power-down
●Dual supply operation (1.8 V DDS core/3.3 V serial I/O)
●Multiple device synchronization
●Selectable 4× to 20× REFCLK multiplier (PLL)
●Selectable REFCLK crystal oscillator
●56-lead LFCSP
●APPLICATIONS
●Agile local oscillators
●Phased array radars/sonars
●Instrumentation
●Synchronized clocking
●RF source for AOTF
●Single-side band suppressed carriers
●Quadrature communications
