参数资料
型号: AD9735BBCZ
厂商: Analog Devices Inc
文件页数: 49/72页
文件大小: 0K
描述: IC DAC 12BIT 1.2GSPS 160-CSPBGA
产品培训模块: Data Converter Fundamentals
DAC Architectures
标准包装: 1
位数: 12
数据接口: 并联
转换器数目: 1
电压电源: 模拟和数字
功率耗散(最大): 550mW
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 160-LFBGA,CSPBGA
供应商设备封装: 160-CSPBGA(12x12)
包装: 托盘
输出数目和类型: 2 电流,单极
采样率(每秒): 1.2G
AD9734/AD9735/AD9736
Rev. A | Page 53 of 72
DAC DATA SOURCES
The circuit shown in Figure 96 allows optimum data alignment
when running the AD973x at full speed. This circuit can be
easily implemented in the FPGA or ASIC used to drive the
digital input. It is important to use the DATACLK_OUT signal
because it helps to cancel some of the timing errors. In this
configuration, DATACLK_OUT generates the DDR LVDS
DATACLK_IN to drive the AD973x. The circuit aligns the
DATACLK_IN and the digital input data (DB<13:0>) as
required by the AD973x. The LVDS controller in the AD973x
uses DATACLK_IN to generate the internal DSS to capture the
incoming data in the center of the valid data window.
04862-094
MUX
D1
DATACLK_OUT
FROM AD9736 (DDR)
DATACLK_IN
TO AD9736 (DDR)
DB(13:0) TO AD9736
DATA SOURCE
LOGIC 0
LOGIC 1
DATA2
DATA1
D2
Figure 96. Recommended FPGA/ASIC Configuration for Driving AD9736
Digital Inputs, 1× Mode
04862-095
DATA1
DATA2
AC
E
B
AB
C
D
B
D
D1
D2
DB
DATACLK_OUT+
DATACLK_IN+
Figure 97. FPGA/ASIC Timing for Driving AD973x Digital Inputs, 1× Mode
To operate in 2× mode, the circuit in Figure 96 must be
modified to include a divide-by-2 block in the path of
DATACLK_OUT. Without this additional divider, the data and
DATACLK_IN runs 2× too fast. DATACLK_OUT is always
DACCLK/2.
Contact FPGA vendors directly regarding the maximum output
data rates supported by their products.
04862-096
MUX
D1
DATACLK_OUT
FROM AD9736 (DDR)
DATACLK_IN
TO AD9736 (DDR)
DB(13:0) TO AD9736
DATA SOURCE
LOGIC 1
LOGIC 0
DATA2
DATA1
D2
÷2
Figure 98. Recommended FPGA/ASIC Configuration for Driving AD9736
Digital Inputs, 2× Mode
04862-097
CLK_OUT+/2
DATA2
DATA1
AC
E
B
AB
C
D
B
D
D1
D2
DB
DATACLK_OUT+
DATACLK_IN+
Figure 99. FPGA/ASIC Timing for Driving AD973x Digital Inputs, 2× Mode
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