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.