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參數資料
| 型號： | AD9953ASV |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 數字信號處理外設 |
| 英文描述： | 400 MSPS 14-Bit, 1.8V CMOS Direct Digital Synthesizer |
| 中文描述： | DSP-NUM CONTROLLED OSCILLATOR, PQFP48 |
| 封裝： | TQFP-48 |
| 文件頁數： | 29/42頁 |
| 文件大小： | 473K |
| 代理商： | AD9953ASV |
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PRELIMINARY TECHNICAL DATA
Profile<1:0> pins and enables the AD9953 to take control of switching between profiles. Modes
are defined that allow continuous or single burst profile switches for three combinations of profile
selection bits. These are listed in the table below. When the any of the CFR1<29:27> bits are
active, the internal profile control mode is engaged.
When the internal profile control mode is engaged, the RAM Segment Mode Control bits are
“Don’t care” and the device operates all profiles as if these mode control bits were programmed for
Ramp-Up mode. Switching between profiles occurs when the RAM address generator has
exhausted the memory contents for the current profile.
CFR1<29:27>
(binary)
000
Internal Control Inactive
001
Internal Control Active, Single Burst, activate profile 0, then 1, then
stop
010
Internal Control Active, Single Burst, activate profile 0, then 1, then 2,
then stop
011
Internal Control Active, Single Burst, activate profile 0, then 1, then 2,
then 3, then stop
100
Internal Control Active, Continuous, activate profile 0, then 1, then
loop starting at 0.
101
Internal Control Active, Continuous, activate profile 0, then 1, then 2,
then loop starting at 0.
110
Internal Control Active, Continuous, activate profile 0, then 1, then 2,
then 3, then loop starting at 0
111
Invalid
Table 4 Internal Profile Control
A single burst mode is one in which the composite sweep is executed once. For example, assume
the device is programmed for Ramp-Up mode and the CFR1<29:27> bits are written to 010(b).
Upon receiving an I/O UPDATE, the internal control logic signals the device to begin executing
the Ramp-Up mode sequence for profile 0. Upon reaching the RAM Segment Final Address value
for profile 0, the device automatically switches to profile 1 and begins executing that Ramp-Up
sequence. Upon reaching the RAM Segment Final Address value for profile 1, the device
automatically switches to profile 2 and begins executing that Ramp-Up sequence. When the RAM
Segment Final Address value for profile 2 is reached, the sequence is over and the composite
sweep has completed. Issuing another I/O UPDATE re-starts the burst process.
A continuous internal profile control mode is one in which the composite sweep is continuously
executed for as long as the device is programmed into that mode. Using the example above, except
programming the CFR1<29:27> bits to 101(b), the operation would be identical until the RAM
AD9953
Mode Description
REV. PrB 1/30/03
Page 29
Analog Devices, Inc.
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相關代理商/技術參數 |
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| 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 |
| 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) |
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