1 Features

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

• Maximum input data rate:

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

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

– 16-bit, Single channel: 12 GSPS

– 8-bit, Dual channel, 12 GSPS

– 12-bit, Dual channel: 7.75 GSPS/ch

– 16-bit, Dual channel: 6.2 GSPS/ch

• Output bandwidth (-3dB): 12 GHz

• Performance at fOUT = 2.997 GHz, DES2XL mode,

DEM/Dither off

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

– SFDR (-0.1dBFS) : –60 dBc

– IMD3 (-7dBFS each tone) : –60 dBc

– Additive phase noise, 10 kHz offset: -137

dBc/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 200 MHz clock

– 60 ns reconfiguration (32-bit frequency)

– Any frequency hopping with phase coherence

• JESD204C Interface

– Up to 16 Lanes at up to 12.8 Gbps

– 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 24 GSPS for a single

channel or 12 GSPS for two channels. The devices

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

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

carrier frequencies exceeding 10 GHz 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 12.8

Gbps. The interface is JESD204B and JESD204C

subclass-1 compliant for deterministic latency and

multi-device synchronization through the use of

SYSREF.