參數(shù)資料
型號： EVAL-AD9835SDZ
廠商： Analog Devices Inc
文件頁數(shù)： 1/28頁
文件大?。?/td> 0K
描述： BOARD EVAL FOR AD9835
標(biāo)準(zhǔn)包裝： 1
主要目的： 計時，直接數(shù)字合成（DDS）
已用 IC / 零件： AD9835
已供物品： 板
50 MHz Direct Digital Synthesizer,
Waveform Generator
Data Sheet
FEATURES
5 V power supply
50 MHz speed
On-chip COS lookup table
On-chip, 10-bit DAC
Serial loading
Power-down option
Temperature range: 40°C to +85°C
200 mW power consumption
16-Lead TSSOP
APPLICATIONS
Frequency stimulus/waveform generation
Frequency phase tuning and modulation
Low power RF/communications systems
Liquid and gas flow measurement
Sensory applications: proximity, motion, and defect
detection
Test and medical equipment
GENERAL DESCRIPTION
The AD9835 is a numerically-controlled oscillator employing
a phase accumulator, a COS lookup table, and a 10-bit digital-
to-analog converter integrated on a single CMOS chip. Modu-
lation capabilities are provided for phase modulation and
frequency modulation.
Clock rates of up to 50 MHz are supported. Frequency accuracy
can be controlled to one part in 4 billion. Modulation is effected
by loading registers through the serial interface. A power-down
bit allows the user to power down the AD9835 when it is not in
use; the power consumption reduces to 1.75 mW.
This part is available in a 16-lead TSSOP package.
Similar DDS products can be found at
FUNCTIONAL BLOCK DIAGRAM
IOUT
COMP
REFIN
FS ADJUST
REFOUT
AGND
AVDD
DGND
DVDD
MCLK
PSEL0 PSEL1
12
AD9835
ON-BOARD
REFERENCE
10-BIT DAC
PHASE0 REG
PHASE1 REG
PHASE2 REG
PHASE3 REG
FULL-SCALE
CONTROL
COS
ROM
PHASE
ACCUMULATOR
(32 BIT)
FREQ0 REG
FREQ1 REG
16-BIT DATA REGISTER
SYNC
FSELECT
BIT
SELSRC
SYNC
8 LSBs
8 MSBs
DECODE LOGIC
FSYNC
SCLK
SDATA
SERIAL REGISTER
CONTROL REGISTER
FSELECT/PSEL REGISTER
DEFER REGISTER
SYNC
SELSRC
PSEL0
BIT
PSEL1
BIT
MUX
MU
X
MU
X
MUX
096
30-
001
Figure 1.
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
1998–2011 Analog Devices, Inc. All rights reserved.
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