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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: 34/42頁
文件大小: 473K
代理商: AD9953PCB
PRELIMINARY TECHNICAL DATA
AD9953
Synchronization; Register Updates (I/O UPDATE)
Functionality of the SyncClk and I/O UPDATE
Data into the AD9953 is synchronous to the sync_clk signal (supplied externally to the user
on the SYNC_CLK pin). The I/O_UPDATE pin is sampled on the rising edge of the sync_clk.
Internally, sysclk is fed to a divide-by-4 frequency divider to produce the sync_clk signal.
The sync_clk signal is provided to the user on the SYNC_CLK pin. This enables synchronization
of external hardware with the device’s internal clocks. This is accomplished by forcing any
external hardware to obtain its timing from sync_clk. The I/O UPDATE signal coupled with
sync_clk is used to transfer internal buffer contents into the Control Registers of the device. The
combination of the sync_clk and I/O UPDATE pins provides the user with constant latency relative
to sysclk and also ensures phase continuity of the analog output signal when a new tuning word or
phase offset value is asserted. Figure E demonstrates an I/O Update timing cycle and
synchronization.
Notes to synchronization logic:
1) The I/O UPDATE signal is edge detected to generate a single rising edge clock signal
that drives the register bank flops. The I/O UPDATE signal has no constraints on duty
cycle. The minimum low time on I/O UPDATE is one sync_clk clock cycle.
2) The I/O UPDATE pin is setup and held around the rising edge of sync_clk and has zero
hold time and 10ns setup time.
REV. PrB 1/30/03
Page 34
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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