- 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)： | 23/42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頁當(dāng)前第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
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(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)。