GENERAL DESCRIPTION

The AD9786 is a 16-bit, high speed, CMOS DAC with 2×/4×/8× interpolation and signal processing features tuned for communications applications. It offers state-of-the-art distortion and noise performance. The AD9786 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.

FEATURES

16-bit resolution, 200 MSPS input data rate

IMD 90 dBc @10 MHz

Noise spectral density (NSD): −164 dBm/Hz @ 10 MHz

WCDMA ACLR = 80 dBc @ 40 MHz IF

DNL = ±0.3 LSB

INL = ±0.6 LSB

Selectable 2×/4×/8× interpolation filters

Selectable fDAC/2, fDAC/4, fDAC/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

3.3 V-compatible digital interface

On-chip 1.2 V reference

80-lead, thermally enhanced, TQFP_EP package

APPLICATIONS

Base stations: multicarrier WCDMA, GSM/EDGE, TD-SCDMA,

IS136, TETRA

Instrumentation

RF signal generators, arbitrary waveform generators

HDTV transmitters

Broadband wireless systems

Digital radio links

Satellite systems