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參數(shù)資料
| 型號： | AD7008 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | M83723 3C 3#16 SKT PLUG |
| 中文描述： | 的CMOS DDS調(diào)制器 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大?。?/td> | 505K |
| 代理商： | AD7008 |
REV. B
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
a
AD7008
Analog Devices, Inc., 1995
One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
CMOS
DDS Modulator
FEATURES
Single +5 V Supply
32-Bit Phase Accumulator
On-Chip COSINE and SINE Look-Up Tables
On-Chip 10-Bit DAC
Frequency, Phase and Amplitude Modulation
Parallel and Serial Loading
Software and Hardware Power Down Options
20 MHz and 50 MHz Speed Grades
44-Pin PLCC
APPLICATIONS
Frequency Synthesizers
Frequency, Phase or Amplitude Modulators
DDS Tuning
Digital Modulation
phase modulation, frequency modulation, and both in-phase and
quadrature amplitude modulation suitable for QAM and SSB
generation.
Clock rates up to 20 MHz and 50 MHz are supported. Fre-
quency accuracy can be controlled to one part in 4 billion.
Modulation may be effected by loading registers either through
the parallel microprocessor interface or the serial interface. A
frequency-select pin permits selection between two frequencies
on a per cycle basis.
The serial and parallel interfaces may be operated independently
and asynchronously from the DDS clock; the transfer control
signals are internally synchronized to prevent metastability prob-
lems. The synchronizer can be bypassed to reduce the transfer
latency in the event that the microprocessor clock is synchro-
nous with the DDS clock.
A power-down pin allows external control of a power-down
mode (also accessible through the microprocessor interface)
The AD7008 is available in 44-pin PLCC.
PRODUCT HIGHLIGHT
1. Low Power
2. DSP/
μ
P Interface
3. Completely Integrated
PRODUCT DESCRIPTION
The AD7008 direct digital synthesis chip is a numerically con-
trolled oscillator employing a 32-bit phase accumulator, sine and
cosine look-up tables and a 10-bit D/A converter integrated on a
single CMOS chip. Modulation capabilities are provided for
FUNCTIONAL BLOCK DIAGRAM
32
32
12
10
10
10
10
10
SIN
COS
12
10-BIT DAC
PHASE
ACCUMULATOR
SIN/COS
ROM
IQMOD [9:0]
IOUT
COMP
FS ADJUST
SDATA
SCLK
GND
RESET
TEST
CLOCK
V
AA
WR
CS
IOUT
AD7008
32-BIT SERIAL REGISTER
32-BIT PARALLEL REGISTER
COMMAND REG
MPU INTERFACE
TRANSFER LOGIC
FULLSCALE
ADJUST
10
IQMOD [19:10]
12
PHASE REG
D0
D15
32
32
FSELECT
MUX
FREQ1
REG
TC0
TC3
LOAD
Σ
10
Σ
FREQ0
REG
Σ
SLEEP
V
REF
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD7008/PCB | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Analog Devices 功能描述: |
| AD7008AP20 | 制造商:Analog Devices 功能描述:Digital Synthesizer 44-Pin PLCC |
| AD7008AP20REEL | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| AD7008AP20-REEL | 制造商:Analog Devices 功能描述:Digital Synthesizer 44-Pin PLCC T/R |
| AD7008JP50 | 制造商:Analog Devices 功能描述: 制造商:Analog Devices 功能描述:SEMICONDUCTORSLINEA |
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