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參數資料
型號: AD9953PCB
廠商: Analog Devices, Inc.
元件分類: XO, clock
英文描述: 400 MSPS 14-Bit, 1.8V CMOS Direct Digital Synthesizer
中文描述: 400 MSPS的14位,1.8V CMOS的直接數字頻率合成器
文件頁數: 32/42頁
文件大小: 473K
代理商: AD9953PCB
PRELIMINARY TECHNICAL DATA
AD9953
Cos(X)
DDS Core
To DAC
OSK Enable
CFR<25>
0
1
Amplitude Scale
Factor Register
(ASF)
0
1
0
0
1
Out
HOLD
Up/Dn
OSK Pin
Amplitude Ramp
Rate Register
(ARR)
Load
Data
EN
Load OSK Timer
CFR1<26>
SyncClock
Clock
inc/dec Enable
Ramp Rate Timer
Auto Scale Factor Generator
AUTO OSK
Enable
CFR<24>
Figure C. On-Off Shaped Keying, Block Diagram
AUTO Shaped On-Off Keying mode operation:
The AUTO Shaped On-Off Keying mode is active when CFR1<25> and CFR1<24> are set. When
AUTO Shaped On-Off Keying mode is enabled, a single scale factor is internally generated and
applied to the multiplier input for scaling the output of the DDS core block (See Figure 9 above).
The scale factor is the output of a 14-bit counter which increments/decrements at a rate determined
by the contents of the 8-bit output ramp rate register. The scale factor increases if the OSK pin is
high, decreases if the pin is low. The scale factor is an unsigned value such that all zeros multiplies
the DDS core output by 0 (decimal) and 3FFFh multiplies the DDS core output by 16383 decimal.
For those users who use the full amplitude (14-bits) but need fast ramp rates, the internally
generated scale factor step size is controlled via the ASF<15:14> bits. The table below describes
the increment/decrement step size of the internally generated scale factor per the ASF<15:14> bits.
REV. PrB 1/30/03
Page 32
Analog Devices, Inc.
相關PDF資料
PDF描述
AD9954 400 MSPS 14-Bit, 1.8 V CMOS Direct Digital Synthesizer
AD9954YSV 400 MSPS 14-Bit, 1.8 V CMOS Direct Digital Synthesizer
AD9954YSV-REEL7 400 MSPS 14-Bit, 1.8 V CMOS Direct Digital Synthesizer
AD9956 2.7 GHz DDS-Based AgileRF
AD9956YCPZ-REEL1 2.7 GHz DDS-Based AgileRF
相關代理商/技術參數
參數描述
AD9953YSV 制造商:Analog Devices 功能描述:Direct Digital Synthesizer 400MHz 1-DAC 14-Bit Serial 48-Pin TQFP EP 制造商:Rochester Electronics LLC 功能描述:AD9953 400 MSPS DDS W/ 14 BIT DAC - Bulk 制造商:Analog Devices 功能描述:IC DDS 400MSPS SMD 9953 TQFP48
AD9953YSV-REEL7 制造商:Analog Devices 功能描述:Direct Digital Synthesizer 400MHz 1-DAC 14-Bit Serial 48-Pin TQFP EP T/R
AD9953YSVZ 功能描述:IC DDS DAC 14BIT 400MSPS 48-TQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 直接數字合成 (DDS) 系列:- 產品變化通告:Product Discontinuance 27/Oct/2011 標準包裝:2,500 系列:- 分辨率(位):10 b 主 fclk:25MHz 調節字寬(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) 供應商設備封裝:16-TSSOP 包裝:帶卷 (TR)
AD9953YSVZ-REEL7 功能描述:IC DDS DAC 14BIT 1.8V 48TQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 直接數字合成 (DDS) 系列:- 產品變化通告:Product Discontinuance 27/Oct/2011 標準包裝:2,500 系列:- 分辨率(位):10 b 主 fclk:25MHz 調節字寬(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) 供應商設備封裝:16-TSSOP 包裝:帶卷 (TR)
AD9954 制造商:AD 制造商全稱:Analog Devices 功能描述:400 MSPS 14-Bit, 1.8 V CMOS Direct Digital Synthesizer
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