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參數(shù)資料
| 型號： | AD9833BRM |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 數(shù)字信號處理外設(shè) |
| 英文描述： | +2.5 V to +5.5 V, 25 MHz Low Power CMOS Complete DDS |
| 中文描述： | DSP-NUM CONTROLLED OSCILLATOR, PDSO10 |
| 封裝： | ROHS COMPLAINT, MO-187BA, MSOP-10 |
| 文件頁數(shù)： | 13/18頁 |
| 文件大?。?/td> | 210K |
| 代理商： | AD9833BRM |
AD9833
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13
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REV PrG
PRELIMINARY TECHNICAL DATA
APPLICATIONS
Because of the various output options available from the
part, the AD9833 can be configured to suit a wide variety
of applications.
One of the areas where the AD9833 is suitable is in modu-
lation applications. The part can be used to perform
simple modulation such as FSK. More complex modula-
tion schemes such as GMSK and QPSK can also be
implemented using the AD9833.
In an FSK application, the two frequency registers of the
AD9833 are loaded with different values; one frequency
will represent the space frequency while the other will
represent the mark frequency. Using the FSELECT bit in
the control register of the AD9833, the user can modulate
the carrier frequency between the two values.
The AD9833 has two phase registers; this enables the part
to perform PSK. With phase shift keying, the carrier fre-
quency is phase shifted, the phase being altered by an
amount which is related to the bit stream being input to
the modulator.
The AD9833 is also suitable for signal generator applica-
tions. Because the MSB of the DAC data is available at
the VOUT pin, the device can be used to generate a
square wave.
With its low current consumption, the part is suitable for
applications in which it can be used as a local oscillator.
GROUNDING AND LAYOUT
The printed circuit board that houses the AD9833 should
be designed so that the analog and digital sections are
separated and confined to certain areas of the board. This
facilitates the use of ground planes which can be separated
easily. A minimum etch technique is generally best for
ground planes as it gives the best shielding. Digital and
analog ground planes should only be joined in one place.
If the AD9833 is the only device requiring an AGND to
DGND connection, then the ground planes should be
connected at the AGND and DGND pins of the AD9833.
If the AD9833 is in a system where multiple devices re-
quire AGND to DGND connections, the connection
should be made at one point only, a star ground point that
should be established as close as possible to the AD9833.
Avoid running digital lines under the device as these will
couple noise onto the die. The analog ground plane should
be allowed to run under the AD9833 to avoid noise cou-
pling. The power supply lines to the AD9833 should use
as large a track as is possible to provide low impedance
paths and reduce the effects of glitches on the power sup-
ply line. Fast switching signals such as clocks should be
shielded with digital ground to avoid radiating noise to
other sections of the board. Avoid crossover of digital and
analog signals. Traces on opposite sides of the board
should run at right angles to each other. This will reduce
the effects of feedthrough through the board. A microstrip
technique is by far the best but is not always possible with
a double-sided board. In this technique, the component
side of the board is dedicated to ground planes while sig-
nals are placed on the other side.
Good decoupling is important. The AD9833 should have
supply bypassing of 0.1 μF ceramic capacitors in parallel
with 10 μF tantalum capacitors. To achieve the best from
the decoupling capacitors, they should be placed as close
as possible to the device, ideally right up against the de-
vice.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD9833BRM-REEL | 制造商:Analog Devices 功能描述:Direct Digital Synthesizer 25MHz 1-DAC 10-Bit Serial 10-Pin MSOP T/R 制造商:Analog Devices 功能描述:PROGRAMMABLE WAVEFORM GENERATOR 10MSOP - Tape and Reel |
| AD9833BRM-REEL7 | 功能描述:IC WAVEFORM GEN PROG 10-MSOP RoHS:否 類別:集成電路 (IC) >> 接口 - 直接數(shù)字合成 (DDS) 系列:- 產(chǎn)品變化通告:Product Discontinuance 27/Oct/2011 標(biāo)準(zhǔn)包裝:2,500 系列:- 分辨率（位）:10 b 主 fclk:25MHz 調(diào)節(jié)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(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR) |
| AD9833BRMZ | 功能描述:IC WAVEFORM GENERTR PROG 10-MSOP RoHS:是 類別:集成電路 (IC) >> 接口 - 直接數(shù)字合成 (DDS) 系列:- 產(chǎn)品變化通告:Product Discontinuance 27/Oct/2011 標(biāo)準(zhǔn)包裝:2,500 系列:- 分辨率（位）:10 b 主 fclk:25MHz 調(diào)節(jié)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(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR) |
| AD9833BRMZ | 制造商:Analog Devices 功能描述:WAVEFORM GENERATOR 9833 MSOP10 |
| AD9833BRMZ-REEL | 功能描述:IC WAVEFORM GEN PROG 10MSOP RoHS:是 類別:集成電路 (IC) >> 接口 - 直接數(shù)字合成 (DDS) 系列:- 產(chǎn)品變化通告:Product Discontinuance 27/Oct/2011 標(biāo)準(zhǔn)包裝:2,500 系列:- 分辨率（位）:10 b 主 fclk:25MHz 調(diào)節(jié)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(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR) |
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