參數(shù)資料
型號(hào)： AD9856AST
廠商： ANALOG DEVICES INC
元件分類： 通信及網(wǎng)絡(luò)
英文描述： CMOS 200 MHz Quadrature Digital Upconverter
中文描述： SPECIALTY TELECOM CIRCUIT, PQFP48
封裝： LQFP-48
文件頁(yè)數(shù)： 1/32頁(yè)
文件大?。?/td> 429K
代理商： AD9856AST
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
AD9856
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
Analog Devices, Inc., 1999
CMOS 200 MHz
Quadrature Digital Upconverter
FUNCTIONAL BLOCK DIAGRAM
DDS AND CONTROL FUNCTIONS
12-BIT
DAC
12
12
12
COSINE
SINE
COMPLEX
DATA IN
REFERENCE
CLOCK IN
TxENABLE
(I/Q SYNC)
PROFILE
SELECT
1–2
PROFILE
SELECT
3–4
MASTER
RESET
SPI INTERFACE
TO AD8320/AD8321
PROGRAMMABLE
CABLE DRIVER
AMPLIFIER
DAC
R
SET
DC-80 MHz
OUTPUT
BIDIRECTIONAL SPI CONTROL INTERFACE:
32-BIT FREQUENCY TUNING WORD
FREQUENCY UPDATE
INTERPOLATION FILTER RATE
REFERENCE CLOCK MULTIPLIER RATE
SPECTRAL PHASE INVERSION ENABLE
CABLE DRIVER AMPLIFIER CONTROL
12
12
12
12
12
12
D
S
C
12
12
INV
SINC
12
AD9856
4
–8
SELECTABLE
INTERPOLATING
HALFBANDS
4
–8
SELECTABLE
INTERPOLATING
HALFBANDS
4
3
–20
PROG.
CLOCK
MULTIPLIER
2
TO 63
SELECTABLE
INTERPOLATOR
2
TO 63
SELECTABLE
INTERPOLATOR
FEATURES
Universal Low Cost Modulator Solution for
Communications Applications
DC to 80 MHz Output Bandwidth
Integrated 12-Bit D/A Converter
Programmable Sample Rate Interpolation Filter
Programmable Reference Clock Multiplier
Internal SIN(x)/x Compensation Filter
>52 dB SFDR @ 40 MHz A
OUT
>48 dB SFDR @ 70 MHz A
OUT
>80 dB Narrowband SFDR @ 70 MHz A
OUT
+3 V Single Supply Operation
Space-Saving Surface-Mount Packaging
Bidirectional Control Bus Interface
Supports Burst and Continuous Tx Modes
Single Tone Mode for Frequency Synthesis Applications
Four Programmable, Pin-Selectable Modulator Profiles
Direct Interface to AD8320/AD8321 PGA Cable Driver
GENERAL DESCRIPTION
The AD9856 integrates a high speed direct-digital synthesizer
(DDS), a high performance, high speed 12-bit digital-to-analog
converter (DAC), clock multiplier circuitry, digital filters and
other DSP functions onto a single chip, to form a complete
quadrature digital upconverter device. The AD9856 is intended
to function as a universal I/Q modulator and agile upconverter
for communications applications, where cost, size, power dissi-
pation and dynamic performance are critical attributes.
The AD9856 is available in a space-saving surface mount pack-
age and specified to operate over the extended industrial tem-
perature range of –40
°
C to +85
°
C.
APPLICATIONS
HFC Data, Telephony and Video Modems
Wireless and Satellite Communications
Cellular Basestations
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