1 Features

? 16-bit, 12/24GSPS, Multi-Nyquist DAC core

? Maximum input data rate:

– 8-bit, Single channel, DES mode: 24GSPS

– 12-bit, Single channel, DES mode: 15.5GSPS

– 16-bit, Single channel: 12GSPS

– 8-bit, Dual channel, 12GSPS

– 12-bit, Dual channel: 7.75GSPS/ch

– 16-bit, Dual channel: 6.2GSPS/ch

? Output bandwidth (–3dB): 12GHz

? Performance at fOUT = 2.997GHz, DES2XL mode,

DEM/Dither off

– Noise floor (small signal): –155dBFS/Hz

– SFDR (-0.1dBFS) : –60dBc

– IMD3 (-7dBFS each tone) : –60dBc

– Additive phase noise, 10 kHz offset: –

137dBc/Hz

? Four integrated digital up-converters (DUC)

– Interpolation: 1x, 2x, 3x, 4x, 6x, 8x ... 256x

– Complex baseband DUC for I/Q output

– Complex to real up conversion for dual channel

direct RF sampling

– 64-bit frequency resolution NCOs

? Fast reconfiguration interface for fast frequency

hopping

– 4-bit data with 200MHz clock

– 60 ns reconfiguration (32-bit frequency)

– Any frequency hopping with phase coherence

? JESD204C Interface

– Up to 16 Lanes at up to 12.8Gbps

– Class C-S, Subclass-1 compatible

– Internal AC coupling capacitors

? SYSREF Windowing for automatic SYSREF timing

calibration

2 Applications

? Satellite Communications (SATCOM)

? Phased array antenna systems

? Synthetic Aperture Radar (SAR) exciter

? Wireless communications testers

? Arbitrary waveform generator (AWG)

3 Description

The DAC39RF12 and 'RFS12 are a family of dual and

single channel digital-to-analog converters (DAC) with

16-bit resolution. The devices can be used as noninterpolating

or interpolating DACs for either direct

RF sampling or complex baseband signal generation.

The maximum input data rate is 24GSPS for a single

channel or 12 GSPS for two channels. The devices

can generate signals of up to 12, 7.5, and 6GHz

signal bandwidth (8, 12, and 16-bit input resolution) at

carrier frequencies exceeding 10GHz enabling direct

sampling through C-band and into X-band.

The high sampling rate, output frequency range, 64-

bit NCO frequency resolution and any frequency

hopping with phase coherence also makes the device

capable of arbitrary waveform generation (AWG) and

direct digital synthesis (DDS).

A JESD204B and JESD204C compatible serial

interface has 16 receiver pairs capable of up

to 12.8Gbps. The interface is JESD204B and

JESD204C subclass-1 compliant for deterministic

latency and multi-device synchronization through the

use of SYSREF.