AD9782 Datasheet | Analog Devices

FEATURES 12-bit resolution, 200 MSPS input data rate Selectable 2×/4×/8× interpolation filters Selectable f DAC/2, f DAC/4, f DAC/8 modulation modes Single or dual-channel signal processing Selectable image rejection Hilbert transform Flexible calibration engine Direct IF transmission features Serial control interface Versatile clock and data interface SFDR 90 d Bc @10 MHz WCDMA ACLR = 80 d Bc @ 40 MHz IF DNL = ±0.75 LSB INL = ±1.5 LSB 3.3 V patible digital Interface On-chip 1.2 V reference 80-lead thermally enhanced TQFP package PRODUCT DESCRIPTION The AD9782 is a 12-bit, high speed, CMOS DAC with 2×/4×/8× interpolation and signal processing features tuned for munications applications. It offers state of the art distortion and noise performance. The AD9782 was developed to meet the demanding performance requirements of multicarrier and third generation base stations. The selectable interpolation filters simplify interfacing to a variety of input data rates while also taking advantage of oversampling performance gains. The modulation modes allow convenient bandwidth placement and selectable sideband suppression. The flexible clock interface accepts a variety of input types such as 1 V p-p sine wave, CMOS, and LVPECL in single ended or differential mode. Internal dividers generate the required data rate interface clocks. The AD9782 provides a differential current output, supporting single-ended or differential applications; it provides a nominal full-scale current from 10 m A to 20 m A. The AD9782 is manufactured on an advanced low cost 0.25 µm CMOS process. APPLICATIONS Digital quadrature modulation architectures Multicarrier WCDMA, GSM, TDMA, DCS, PCS, CDMA Systems FUNCTIONAL BLOCK DIAGRAM LATCH 2× 2× 2× CALIBRATION I 0 ∆t REFERENCE CIRCUITS FSADJ REFIO DATA ASSEMBLER 90 f DAC/2 f DAC/4 f DAC/8 0 90 0 90 P1B[15:0] P2B[15:0] Re()/Im() ZERO STUFF 16-BIT DAC IOUTA IOUTB SDIO HILBERT DATA PORT SYNCHRONIZER CSB SCLK RESET ×1 LATCH 2× ×2 2× ×4...