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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： | 23/42頁 |
| 文件大小： | 473K |
| 代理商： | AD9953PCB |
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PRELIMINARY TECHNICAL DATA
Frequency Tuning Word 0 (FTW0)
The Frequency Tuning Word is a 32-bit register that controls the rate of accumulation in the phase
accumulator of the DDS core. Its specific role is dependent on the device mode of operation.
Phase Offset Word (POW)
The Phase Offset Word is a 14-bit register that stores a phase offset value. This offset value is
added to the output of the phase accumulator to offset the current phase of the output signal. The
AD9953
exact value of phase offset is given by the following formula:
°
=
Φ
360
*
2
14
POW
When the RAM enable bit is set, CFR1<31> = 1, and the RAM destination is cleared,
CFR1<30>=0, the RAM supplies the phase offset word and this register has no affect on device
operation.
Frequency Tuning Word 1 (FTW1)
The Frequency Tuning Word is a 32-bit register that controls the rate of accumulation in the phase
accumulator of the DDS core. Its specific role is dependent on the device mode of operation.
RAM Segment Control Words 0,1,2,3 (RSCW0) (RSCW1) (RSCW2), (RSCW3)
Registers h’07, h’08, h’09 and h’0A act as the RAM segment Control words, RSCW0, RSCW1,
RCSW2 and RCSW3 respectively. Each of the RAM Segment Control Words contains a 3-bit
Mode Control value, a ‘No Dwell’ bit, a 10-bit Beginning Address, a 10-bit Final Address and a
16-bit Address Ramp Rate. Please see the section on RAM modes of operation for details on how
each of these values works in the various RAM modes of operation.
RAM
The AD9953 incorporates a 1024x32 block of SRAM. The RAM is bi-directional single-
port. That is to say, both READ and WRITE operations from and to the RAM are valid, but they
cannot occur simultaneously. WRITE operations from the serial I/O port have precedence, and if
an attempt to WRITE to RAM is made during a READ operation, the READ operation will be
halted. The RAM is controlled in multiple ways, dictated by modes of operation described in the
RAM Segment Control Word <7:5> as well as data in the Control Function Register. Read/write
control for the RAM will be described for each mode supported.
When the RAM Enable bit (CFR1<31>) is set, the RAM output optionally drives the input to the
phase accumulator OR the phase offset adder, depending upon the state of the “RAM Destination”
bit (CFR1<30>). If CFR1<30> is a logic one, the RAM output is connected to the Phase Offset
adder and supplies the phase offset control word(s) for the device. When CFR1<30> is logic zero
(default condition), the RAM output is connected to the input of the phase accumulator and
supplies the frequency tuning word(s) for the device. When the RAM output drives the phase
accumulator, the Phase Offset Word (POW, hex address 05h) drives the phase-offset adder.
REV. PrB 1/30/03
Page 23
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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