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參數資料
| 型號： | AD9951PCB |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | XO, clock |
| 英文描述： | 400 MSPS 14-Bit, 1.8 V CMOS Direct Digital Synthesizer |
| 中文描述： | 400 MSPS的14位，1.8伏的CMOS直接數字頻率合成 |
| 文件頁數： | 21/28頁 |
| 文件大小： | 825K |
| 代理商： | AD9951PCB |
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AD9951
There are two phases to a communication cycle with the
AD9951. Phase 1 is the instruction cycle, which is the writing of
an instruction byte into the AD9951, coincident with the first
eight SCLK rising edges. The instruction byte provides the
AD9951 serial port controller with information regarding the
data transfer cycle, which is Phase 2 of the communication cycle.
The Phase 1 instruction byte defines whether the upcoming data
transfer is read or write and the serial address of the register
being accessed. [Note that the serial address of the register
being accessed is NOT the same address as the bytes to be
written. See the Example Operation section for details.]
Rev. 0 | Page 21 of 28
The first eight SCLK rising edges of each communication cycle
are used to write the instruction byte into the AD9951. The
remaining SCLK edges are for Phase 2 of the communication
cycle. Phase 2 is the actual data transfer between the AD9951
and the system controller. The number of bytes transferred
during Phase 2 of the communication cycle is a function of the
register being accessed. For example, when accessing the Control
Function Register No. 2, which is three bytes wide, Phase 2 requires
that three bytes be transferred. If accessing the frequency tuning
word, which is four bytes wide, Phase 2 requires that four bytes
be transferred. After transferring all data bytes per the instruc-
tion, the communication cycle is completed.
At the completion of any communication cycle, the AD9951
serial port controller expects the next eight rising SCLK edges
to be the instruction byte of the next communication cycle. All
data input to the AD9951 is registered on the rising edge of
SCLK. All data is driven out of the AD9951 on the falling edge
of SCLK. Figure 21 through Figure 24 are useful in understand-
ing the general operation of the AD9951 serial port.
0
I
6
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1
D
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D
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D
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D
2
D
1
D
0
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0
D
7
D
6
I
7
INSTRUCTION CYCLE
SCLK
SDIO
DATA TRANSFER CYCLE
CS
Figure 21. Serial Port Write Timing–Clock Stall Low
0
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6
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5
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3
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1
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0
DON'T CARE
I
7
INSTRUCTION CYCLE
SCLK
SDIO
DATA TRANSFER CYCLE
D
O 5
D
O 4
D
O 3
D
O 2
D
O 1
D
O 0
D
O 7
D
O 6
SDO
CS
Figure 22. 3-Wire Serial Port Read Timing–Clock Stall Low
0
I
6
I
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1
D
5
D
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D
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0
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D
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D
6
I
7
INSTRUCTION CYCLE
SCLK
SDIO
DATA TRANSFER CYCLE
CS
Figure 23. Serial Port Write Timing–Clock Stall High
0
I
6
I
5
I
4
I
3
I
2
I
1
D
O 5
D
O 4
D
O 3
D
O 2
D
O 1
D
O 0
I
0
D
O 7
D
O 6
I
7
INSTRUCTION CYCLE
SCLK
SDIO
DATA TRANSFER CYCLE
CS
Figure 24. 2-Wire Serial Port Read Timing—Clock Stall High
相關PDF資料 |
PDF描述 |
|---|---|
| AD9951YSV | 400 MSPS 14-Bit, 1.8 V CMOS Direct Digital Synthesizer |
| AD9952YSV-REEL7 | Hook-Up Wire; Conductor Size AWG:12; No. Strands x Strand Size:65 x 30; Jacket Color:Red; Approval Bodies:UL, CSA; Approval Categories:UL AWM Style 1015, CSA Type TEW, JQA-F-, Passes VW-1 Flame Test; Conductor Material:Copper RoHS Compliant: Yes |
| AD9952 | 400 MSPS 14-Bit, 1.8 V CMOS Direct Digital Synthesizer |
| AD9952YSV | 400 MSPS 14-Bit, 1.8 V CMOS Direct Digital Synthesizer |
| AD9953 | 400 MSPS 14-Bit, 1.8V CMOS Direct Digital Synthesizer |
相關代理商/技術參數 |
參數描述 |
|---|---|
| AD9951YSV | 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:Analog Devices 功能描述:IC 14-BIT DAC DDS |
| AD9951YSV-REEL7 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
| AD9951YSVZ | 功能描述:IC DDS DAC 14BIT 1.8V 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) |
| AD9951YSVZ-REEL7 | 制造商:Analog Devices 功能描述:DGTL SYNTHESIZER 48TQFP EP TAPE AND REEL - Tape and Reel |
| AD9952 | 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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