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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： | 28/42頁 |
| 文件大小： | 473K |
| 代理商： | AD9953PCB |
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PRELIMINARY TECHNICAL DATA
beginning address and the ramp rate timer begins to count down to 1. When the ramp rate timer
completes a cycle, the RAM address generator increments to the next address, the timer reloads the
ramp rate bits and continues counting down. This sequence continues until the RAM address
generator has incremented to an address equal to the RAM Segment Final Address bits of the
current RSCW. Upon reaching this terminal address, the RAM address generator reloads the RAM
Segment Beginning Address bits and the sequence repeats.
The
sequence of circulating through the specified RAM addresses repeats for as long as the part is
programmed for this mode. The No Dwell bit is a don’t care in this mode.
Notes to the Continuous Re-circulate mode:
1) The user must insure that the beginning address is lower than the final address.
2) Changing profiles or issuing an I/O UPDATE automatically terminates the current sweep
and starts the next sweep.
3) Setting the RAM destination bit true such that the RAM output drives the phase-offset adder
is valid. While the above discussion describes a frequency sweep, a phase sweep operation
is also available.
RAM Controlled Modes of Operation Summary
The AD9953 offers 5 modes of RAM controlled operation, as shown in table 3 below.
RSCW<7:5>
(binary)
000
Direct Switch Mode
AD9953
Mode
Notes
No sweeping, Profiles valid, No
Dwell invalid
Sweeping, Profiles valid, No Dwell
valid
Sweeping, Profile<0> is a direction
control bit, No Dwell invalid
Sweeping, Profiles valid, No Dwell
invalid
Sweeping, Profiles valid, No Dwell
invalid
Invalid mode – default to Direct
Switch
001
Ramp Up
010
Bi-directional Ramp
011
Continuous Bi-
directional Ramp
Continuous Re-circulate
100
101,110,111
OPEN
Table 3 RAM Modes of Operation
Internal Profile Control
The AD9953 offers a mode in which a composite frequency sweep can be built, for which the
timing control is software programmable. The “internal profile control” capability disengages the
REV. PrB 1/30/03
Page 28
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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