- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄373971 > AD9953 (Analog Devices, Inc.) 400 MSPS 14-Bit, 1.8V CMOS Direct Digital Synthesizer PDF資料下載
參數(shù)資料
| 型號： | AD9953 |
| 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(shù)字頻率合成器 |
| 文件頁數(shù)： | 34/42頁 |
| 文件大?。?/td> | 473K |
| 代理商： | AD9953 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁當(dāng)前第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁
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(guān)PDF資料 |
PDF描述 |
|---|---|
| AD9953ASV | 400 MSPS 14-Bit, 1.8V CMOS Direct Digital Synthesizer |
| AD9953PCB | 400 MSPS 14-Bit, 1.8V CMOS Direct Digital Synthesizer |
| 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 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD9953/PCB | 制造商:Analog Devices 功能描述:400 MSPS, 14BIT DGTL SYNTHESIZER - Bulk |
| AD9953ASV | 制造商:AD 制造商全稱:Analog Devices 功能描述:400 MSPS 14-Bit, 1.8V CMOS Direct Digital Synthesizer |
| AD9953PCB | 制造商:AD 制造商全稱:Analog Devices 功能描述:400 MSPS 14-Bit, 1.8V CMOS Direct Digital Synthesizer |
| 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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。