AD9854 Datasheet | Analog Devices

FEATURES 300 MHz internal clock rate FSK, BPSK, PSK, chirp, AM operation Dual integrated 12-bit digital-to-analog converters (DACs) Ultrahigh speed parator, 3 ps rms jitter Excellent dynamic performance 80 d B SFDR at 100 MHz (±1 MHz) AOUT 4× to 20× programmable reference clock multiplier Dual 48-bit programmable frequency registers Dual 14-bit programmable phase offset registers 12-bit programmable amplitude modulation and on/off output shaped keying function Single-pin FSK and BPSK data interfaces PSK capability via input/output interface Linear or nonlinear FM chirp functions with single-pin frequency hold function Frequency-ramped FSK <25 ps rms total jitter in clock generator mode Automatic bidirectional frequency sweeping Sin(x)/x correction Simplified control interfaces 10 MHz serial 2- or 3-wire SPI patible 100 MHz parallel 8-bit programming 3.3 V single supply Multiple power-down functions Single-ended or differential input reference clock Small, 80-lead LQFP or TQFP with exposed pad APPLICATIONS Agile, quadrature LO frequency synthesis Programmable clock generators FM chirp source for radar and scanning systems Test and measurement equipment mercial and amateur RF exciters FUNCTIONAL BLOCK DIAGRAM REFERENCE CLOCK IN DIFF/SINGLE SELECT FSK/BPSK/HOLD DATA IN REF CLK BUFFER SYSTEM CLOCK 4× TO 20× REF CLK MULTIPLIER 48 48 SYSTEM CLOCK DEMUX DELTA FREQUENCY RATE TIMER FREQUENCY ACCUMULATOR ACC 1 PHASE ACCUMULATOR ACC 2 PHASE-TOAMPLITUDE CONVERTER DDS CORE 14 MUX 12 I 12 Q INV DIGITAL MULTIPLIERS SINC FILTER 12-BIT I INV SINC...