AD9959

4-Channel, 500 MSPS DDS with 10-Bit DACs AD9959 FEATURES 4 synchronized DDS channels @ 500 MSPS Independent frequency/phase/amplitude control between channels Matched latencies for frequency/phase/amplitude changes Excellent channel-to-channel isolation (>65 dB) Linear frequency/phase/amplitude sweeping capability Up to 16 levels of frequency/phase/amplitude modulation (pin-selectable) 4 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 enhanced 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 package APPLICATIONS Agile local oscillators Phased array radars/sonars Instrumentation Synchronized clocking RF source for AOTF SYSTEM CLOCK SOURCE FUNCTIONAL BLOCK DIAGRAM (4) 500MSPS DDS CORES MODULATION CONTROL REF CLOCK INPUT CIRCUITRY TIMING AND CONTROL 10-BIT DAC 10-BIT DAC 10-BIT DAC 10-BIT DAC RECONSTRUCTED SINE WAVE RECONSTRUCTED SINE WAVE RECONSTRUCTED SINE WAVE RECONSTRUCTED SINE WAVE 05246-101 USER INTERFACE Figure 1. Rev. B Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for it...