1 Features
1• 14-Bit resolution, 9-GSPS DAC with multimode
operation
– 16-Bit, Dual-channel data mode
– Max input rate: 2.5-GSPS
– Wideband digital up-converter
– Interpolation:
1,2,4,6,8,10,12,16,18,20,24x
– 12-Bit, Dual-channel data mode
– Max input rate: 3.33-GSPS
– Wideband digital Up-converter
– Interpolation: 1,2,24x
– 8-Bit, Single-channel data mode
– Max input rate: 9-GSPS
• JESD204B interface
– Subclass 1 for multichip synchronization
– DAC38RF89: Maximum lane rate: 12.5 Gbps
– DAC38RF82: Maximum lane rate: 12.8 Gbps
• Differential output
– Supports DC coupling
– RF Full-scale output power (with 2:1 balun):
3 dBm at 2.14 GHz
• Internal PLL and VCO with bypass
– DAC38RF82: fC(VCO) = 5.9 or 8.9 GHz
– DAC38RF89: fC(VCO) = 5 or 7.5 GHz
• Power supplies: -1.8 V, 1.0 V, 1.8 V
• Package: 10 x 10 mm BGA, 0.8 mm pitch,
144-balls

2 Applications
• Arbitrary waveform generators
• Radar and electronic warfare
• Communications test equipment
• Direct RF synthesis for DOCSIS 3.0/3.1
• Microwave backhaul

3 Description
The DAC38RF82 and DAC38RF89 are high
performance, wide bandwidth RF-sampling digital-toanalog
(DACs) that are capable of dual channel input
data rate up to 3.33 GSPS or single-channel
operation with 8-bits up to 9-GSPS. The devices have
a low power JESD204B Interface with up to 8 lanes,
with a maximum bit rate of 12.5 Gbps (DAC38RF89)
and 12.8 Gbps (DAC38RF82).
In dual channel operation, the input interface is
capable of data rates up to 3.33 GSPS at 12-bits and
2.5 GSPS at 16-bits resolution without interpolation.
When used as a complex baseband transmitter with
interpolation modes from 2x to 24x, the DAC38RF82
or DAC38RF89 is capable of synthesizing wideband
signals up to 2 GHz bandwidth with 16-bit input
resolution and 2.66 GHz bandwidth with 12-bit input
resolution.
The 8-bit mode allows an input at the full 9 GSPS
maximum DAC sample rate and can synthesize
wideband signals from 0 to 4.5 GHz.
An optional low jitter PLL/VCO simplifies the DAC
clock generation by allowing use of a lower frequency
reference clock. DAC38RF82 and DAC38RF89
support different VCO frequency ranges, summarized
in Device Comparison Table.