AD9775

14-Bit, 160 MSPS, 2×/4×/8× Interpolating Dual TxDAC+® Digital-to-Analog Converter AD9775 FEATURES 14-bit resolution, 160 MSPS/400 MSPS input/output data rate Selectable 2×/4×/8× interpolating filter Programmable channel gain and offset adjustment fS/4, fS/8 digital quadrature modulation capability Direct IF transmission mode for 70 MHz + IFs Enables image rejection architecture Fully compatible SPI® port Excellent ac performance SFDR: −71 dBc @ 2 MHz to 35 MHz W-CDMA ACPR: −71 dB @ IF = 19.2 MHz Internal PLL clock multiplier Selectable internal clock divider Versatile clock input Differential/single-ended sine wave or TTL/CMOS/LVPECL compatible Versatile input data interface Twos complement/straight binary data coding Dual-port or single-port interleaved input data Single 3.3 V supply operation Power dissipation: 1.2 W @ 3.3 V typical On-chip, 1.2 V reference 80-lead, thin quad flat package, exposed pad (TQFP_EP) APPLICATIONS Communications Analog quadrature modulation architecture 3G, multicarrier GSM, TDMA, CDMA systems Broadband wireless, point-to-point microwave radios Instrumentation/ATE FUNCTIONAL BLOCK DIAGRAM VREF IOFFSET AD9775 14 I AND Q NONINTERLEAVED OR INTERLEAVED DATA 14 DATA ASSEMBLER HALFBAND FILTER1* I 16 LATCH 16 HALF- HALFBAND BAND FILTER2* FILTER3* 16 16 Q 16 LATCH 16 16 16 COS SIN fDAC/2, 4, 8 SIN IMAGE REJECTION/ DUAL DAC MODE BYPASS MUX WRITE SELECT MUX CONTROL CLOCK OUT /2 SPI INTERFACE AND CONTROL REGISTERS /2 /2 * HALF-BAND F...