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.