11-/14-Bit, 5.6 GSPS,
RF Digital-to-Analog Converter
Data Sheet
AD9119/AD9129
FEATURES
FUNCTIONAL BLOCK DIAGRAM
RESET
IRQ
I250U VREF
DAC update rate: up to 5.6 GSPS
Direct RF synthesis at 2.8 GSPS data rate
DC to 1.4 GHz in baseband mode
DC to 1.0 GHz in 2× interpolation mode
1.4 GHz to 4.2 GHz in Mix-Mode
AD9129
SDIO
SDO
CS
1.2V
SPI
SCLK
FRM_x
Bypassable 2× interpolation
Excellent dynamic performance
Supports DOCSIS 3.0 wideband ACLR/harmonic performance
8 QAM carriers: ACLR > 65 dBc
(FRAME/
PARITY)
MIX-
NORMAL MODE
BASEBAND
MODE
P0_D[13:0]P,
P0_D[13:0]N
IOUTP
IOUTN
Tx DAC
CORE
DLL
DCI_x
Industry-leading single/multicarrier IF or RF synthesis
4-carrier W-CDMA ACLR at 2457.6 MSPS
2×
f
f
f
OUT = 900 MHz, ACLR = 71 dBc (baseband mode)
OUT = 2100 MHz, ACLR = 68 dBc (Mix-Mode)
OUT = 2700 MHz, ACLR = 67 dBc (Mix-Mode)
P1_D[13:0]P,
P1_D[13:0]N
PLL
Dual-port LVDS and DHSTL data interface
Up to 1.4 GSPS operation
CLOCK
DISTRIBUTION
DCR
DCO_x
Source synchronous DDR clocking with parity bit
Low power: 1.0 W at 2.8 GSPS (1.3 W at 5.6 GSPS)
DACCLK_x
Figure 1.
APPLICATIONS
Broadband communications systems
CMTS/VOD
Wireless infrastructure: W-CDMA, LTE, point-to-point
Instrumentation, automatic test equipment (ATE)
Radars, jammers
GENERAL DESCRIPTION
The AD9119/AD9129 are high performance, 11-/14-bit RF digital-
to-analog converters (DACs) supporting data rates up to 2.8 GSPS.
The DAC core is based on a quad-switch architecture that enables
dual-edge clocking operation, effectively increasing the DAC
update rate to 5.6 GSPS when configured for Mix-Mode™ or 2×
interpolation. The high dynamic range and bandwidth enable
multicarrier generation up to 4.2 GHz.
The AD9119/AD9129 include several features that may further
simplify system integration. A dual-port, source synchronous
LVDS interface simplifies the data interface to a host FPGA/ASIC.
A differential frame/parity bit is also included to monitor the
integrity of the interface. On-chip delay locked loops (DLLs)
are used to optimize timing between different clock domains.
A serial peripheral interface (SPI) is used to configure the
AD9119/AD9129 and monitor the status of readback registers.
The AD9119/AD9129 is manufactured on a 0.18 µm CMOS
process and operates from +1.8 V and −1.5 V supplies. It is
supplied in a 160-ball chip scale package ball grid array.
In baseband mode, wide bandwidth capability combines with high
dynamic range to support from 1 to 158 contiguous carriers for
CATV infrastructure applications. A choice of two optional 2×
interpolation filters is available to simplify the postreconstruction
filter by effectively increasing the DAC update rate by a factor of 2.
In Mix-Mode operation, the AD9119/AD9129 can reconstruct
RF carriers in the second and third Nyquist zone while still
maintaining exceptional dynamic range up to 4.2 GHz. The
high performance NMOS DAC core features a quad-switch
architecture that enables industry-leading direct RF synthesis
performance with minimal loss in output power. The output
current can be programmed over a range of 9.5 mA to 34.4 mA.
PRODUCT HIGHLIGHTS
1. High dynamic range and signal reconstruction bandwidth
support RF signal synthesis of up to 4.2 GHz.
2. Dual-port interface with double data rate (DDR) LVDS
data receivers supports 2800 MSPS maximum conversion rate.
3. Manufactured on a CMOS process; a proprietary switching
technique enhances dynamic performance.
Rev. 0
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