Data Sheet
11-/14-Bit, 2.5 GSPS, RF Digital-to-Analog Converters
AD9737A/AD9739A
FEATURES
Direct RF synthesis at 2.5 GSPS update rate DC to 1.25 GHz in baseband mode 1.25 GHz to 3.0 GHz in mix-mode
Industry leading single/multicarrier IF or RF synthesis Dual-port LVDS data interface
Up to 1.25 GSPS operation Source synchronous DDR clocking Pin compatible with the AD9739 Programmable output current: 8.7 mA to 31.7 mA Low power: 1.1 W at 2.5 GSPS
APPLICATIONS
Broadband communications systems DOC.
RF Digital-to-Analog Converters
Data Sheet
11-/14-Bit, 2.5 GSPS, RF Digital-to-Analog Converters
AD9737A/AD9739A
FEATURES
Direct RF synthesis at 2.5 GSPS update rate DC to 1.25 GHz in baseband mode 1.25 GHz to 3.0 GHz in mix-mode
Industry leading single/multicarrier IF or RF synthesis Dual-port LVDS data interface
Up to 1.25 GSPS operation Source synchronous DDR clocking Pin compatible with the AD9739 Programmable output current: 8.7 mA to 31.7 mA Low power: 1.1 W at 2.5 GSPS
APPLICATIONS
Broadband communications systems DOCSIS CMTS systems
Military jammers Instrumentation, automatic test equipment Radar, avionics
SDIO SDO
CS SCLK
FUNCTIONAL BLOCK DIAGRAM
RESET
IRQ
AD9737A/AD9739A
1.2V
SPI
DAC BIAS
VREF
I120
LVDS DDR RECEIVER
DB0[13:0]
DATA LATCH
IOUTN
DCI
TxDAC CORE
IOUTP
4-TO-1 DATA ASSEMBLER
DATA CONTROLLER
LVDS DDR RECEIVER
DB1[13:0]
DCO
CLK DISTRIBUTION (DIV-BY-4)
DLL (MU CONTROLLER)
09616-001
GENERAL DESCRIPTION
The AD9737A/AD9739A are 11-bit and 14-bit, 2.5 GSPS high performance RF DACs that are capable of synthesizing wideband signals from dc up to 3 GHz. The AD9737A/AD9739A are pin and functionally compatible with the AD9739 with the exception that the AD9737A/AD9739A do not support synchronization or RZ mode, and are specified to operate between 1.6 GSPS and 2.5 GSPS.
By elimination of the synchronization circuitry, some nonideal artifacts such as images and discrete clock spurs remain stationary on the AD9737A/AD9739A between power-up cycles, thus allowing for possibl.