參數(shù)資料
型號(hào)： AD9852AST
廠商： ANALOG DEVICES INC
元件分類： XO, clock
英文描述： CMOS 300 MHz Complete-DDS
中文描述： PLL FREQUENCY SYNTHESIZER, 20 MHz, PQFP80
封裝： MS-026BEC, LQFP-80
文件頁(yè)數(shù)： 33/42頁(yè)
文件大?。?/td> 424K
代理商： AD9852AST
AD9852
–33–
REV. 0
SOLDER MASK
OPENING
THERMAL LAND
Figure 59.
The thermal land itself must be able to distribute heat to an even
larger copper plane such as an internal ground plane. Vias must be
uniformly provided over the entire thermal pad to connect to this
internal plane. A proposed via pattern is shown in Figure 60. Via
holes should be small (12 mils, 0.3 mm) such that they can be
plated and plugged. These will provide the mechanical conduit
for heat transfer.
Figure 60.
Finally, a proposed stencil design is depicted for screen solder
placement. Note that if vias are not plugged, wicking will occur
which will displace solder away from the exposed heat sink and
the necessary mechanical bond will not be established.
Figure 61.
EVALUATION BOARD
An evaluation board is available that supports the AD9852 DDS
devices. This evaluation board consists of a PCB, software, and
documentation to facilitate bench analysis of the performance of
the AD9852 device. It is recommended that users of the AD9852
familiarize themselves with the operation and performance
capabilities of the device with the evaluation board. The evaluation
board should also be used as a PCB reference design to ensure
optimum dynamic performance from the device.
OPERATING INSTRUCTIONS
To assist in proper placement of the pin-header shorting-jumpers,
the instructions will refer to direction (left, right, top, bottom)
as well as header pins to be shorted. Pin #1 for each three pin-
header has been marked on the PCB corresponding with the
schematic diagram. When following these instructions, position
the PCB so that the text can be read from left to right. The
board is shipped with the pin-headers configuring the board
as follows:
1. REFCLK for the AD9852 is configured as differential. The
differential clock signals are provided by the 100LVEL16
differential receiver.
2. Input clock for the 100LVEL16 is single-ended via J5. This
signal may be 3.3 V CMOS or a 2 V p-p sine wave capable of
driving 50
(R8).
3. Both DAC outputs from the AD9852 are routed through
the two 120 MHz elliptical LP filters and their outputs con-
nected to J3 (Q) and J4 (I).
4. The board is set up for software control via the printer port
connector.
5. Configured for AD9852 operation.
Load the software
from the CD onto the host PC’s hard disk.
Only Windows 9X/NT operating system is supported. Connect
a printer cable from the PC to the AD9852 Evaluation Board
printer port connector labeled “J11.”
相關(guān)PDF資料
PDF描述
AD9853-45PCB Programmable Digital OPSK/16-QAM Modulator
AD9853-65PCB Programmable Digital OPSK/16-QAM Modulator
AD9853AS Programmable Digital OPSK/16-QAM Modulator
AD9854ASQ CMOS 300 MHz Quadrature Complete-DDS
AD9854AST CMOS 300 MHz Quadrature Complete-DDS
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD9852ASTZ 功能描述:IC DDS SYNTHESIZER CMOS 80-LQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 直接數(shù)字合成 (DDS) 系列:- 產(chǎn)品變化通告:Product Discontinuance 27/Oct/2011 標(biāo)準(zhǔn)包裝:2,500 系列:- 分辨率（位）:10 b 主 fclk:25MHz 調(diào)節(jié)字寬（位）:32 b 電源電壓:2.97 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR)
AD9852ASTZ 制造商:Analog Devices 功能描述:IC DDS 100MHZ LQFP-80
AD9852ASTZ1 制造商:AD 制造商全稱:Analog Devices 功能描述:CMOS 300 MSPS Complete DDS
AD9852ASVZ 功能描述:IC DDS SYNTHESIZER CMOS 80-TQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 直接數(shù)字合成 (DDS) 系列:- 產(chǎn)品變化通告:Product Discontinuance 27/Oct/2011 標(biāo)準(zhǔn)包裝:2,500 系列:- 分辨率（位）:10 b 主 fclk:25MHz 調(diào)節(jié)字寬（位）:32 b 電源電壓:2.97 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR)
AD9852ASVZ 制造商:Analog Devices 功能描述:IC DDS 300MHz TQFP-80 制造商:Analog Devices 功能描述:IC, DDS, 300MHz, TQFP-80
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