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AD9122-EP Arkusz danych(PDF) 1 Page - Analog Devices

Numer części AD9122-EP
Szczegółowy opis  TxDAC Digital-to-Analog Converter
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Strona internetowa  http://www.analog.com
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AD9122-EP Arkusz danych(HTML) 1 Page - Analog Devices

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Dual, 16-Bit, 1130 MSPS,
TxDAC+ Digital-to-Analog Converter
Enhanced Product
AD9122-EP
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother
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
www.analog.com
Fax: 781.461.3113
©2012 Analog Devices, Inc. All rights reserved.
FEATURES
Flexible LVDS interface allows word, byte, or nibble load
Single-carrier W-CDMA ACLR = 82 dBc at 122.88 MHz IF
Analog output: adjustable 8.7 mA to 31.7 mA
Integrated 1x/2×/4×/8× interpolator/complex modulator
allows carrier placement anywhere in the DAC bandwidth
Gain, dc offset, and phase adjustment for sideband
suppression
Multiple chip synchronization interfaces
High performance, low noise PLL clock multiplier
Digital inverse sinc filter
Low power: 1.5 W at 1.2 GSPS, 800 mW at 500 MSPS, full
operating conditions
72-lead, exposed paddle LFCSP
ENHANCED PRODUCT FEATURES
Supports defense and aerospace applications (AQEC standard)
Military temperature range (such as −55°C to +105°C)
Controlled manufacturing baseline
One assembly/test site
One fabrication site
Enhanced product change notification
Qualification data available on request
APPLICATIONS
Wireless infrastructure
W-CDMA, CDMA2000, TD-SCDMA, WiMAX, GSM, LTE
Digital high or low IF synthesis
Transmit diversity
Wideband communications: LMDS/MMDS, point-to-point
GENERAL DESCRIPTION
The AD9122-EP is a dual, 16-bit, high dynamic range digital-to-
analog converter (DAC) that provides a sample rate of 1130 MSPS,
permitting multicarrier generation up to the Nyquist frequency.
The AD9122-EP TxDAC+® includes features optimized for direct
conversion transmit applications, including complex digital
modulation, and gain and offset compensation. The DAC outputs
are optimized to interface seamlessly with analog quadrature
modulators, such as the ADL537x F-MOD series from Analog
Devices, Inc. A 4-wire serial port interface provides for
programming/readback of many internal parameters. Full-scale
output current can be programmed over a range of 8.7 mA to
31.7 mA. The AD9122-EP comes in a 72-lead LFCSP. Additional
application and technical information can be found in the
AD9122 data sheet.
PRODUCT HIGHLIGHTS
1. Ultralow noise and intermodulation distortion (IMD)
enable high quality synthesis of wideband signals from
baseband to high intermediate frequencies (IF).
2. Proprietary DAC output switching technique enhances
dynamic performance.
3. Current outputs are easily configured for various single-
ended or differential circuit topologies.
4. Flexible LVDS digital interface allows the standard 32-wire
bus to be reduced to one-half or one-quarter of the width.
COMPANION PRODUCTS
IQ Modulators: ADL5370, ADL537x family
IQ Modulators with PLL and VCO: ADRF6701, ADRF670x family
Clock Drivers: AD9516, AD951x family
Voltage Regulator Design Tool: ADIsimPower
Additional companion products on the AD9122 product page
TYPICAL SIGNAL CHAIN
NOTES
1. AQM = ANALOG QUADRATURE MODULATOR.
COMPLEX BASEBAND
DC
COMPLEX IF
fIF
RF
LO – fIF
DIGITAL
BASEBAND
PROCESSOR
PA
I DAC
Q DAC
2
2
2/4
2/4
ANTIALIASING
FILTER
AQM
LO
SIN
COS
Figure 1.


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