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AD9148-M5372-EBZ Arkusz danych(PDF) 1 Page - Analog Devices

Numer części AD9148-M5372-EBZ
Szczegółowy opis  Quad 16-Bit,1 GSPS, TxDAC Digital-to-Analog Converter
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Producent  AD [Analog Devices]
Strona internetowa  http://www.analog.com
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Quad 16-Bit,1 GSPS,
TxDAC+ Digital-to-Analog Converter
Preliminary Technical Data
AD9148
Rev. PrA
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother
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
©2010 Analog Devices, Inc. All rights reserved.
FEATURES
Single-carrier W-CDMA ACLR = 80 dBc @ 150 MHz IF
Channel-to-channel isolation > 90 dB
Analog output
Adjustable 8.7 mA to 31.7 mA
RL = 25 Ω to 50 Ω
Novel 2×, 4×, and 8× interpolator eases data interface
On-chip fine complex NCO allows carrier placement
anywhere in DAC bandwidth
High performance, low noise PLL clock multiplier
Multiple chip synchronization interface
Programmable digital inverse sinc filter
Auxiliary DACs allow for offset control
Gain DACs allow for I and Q gain matching
Programmable I and Q phase compensation
Digital gain control
Flexible LVDS digital I/F supports 32- or 16-bit bus widths
196-ball CSP_BGA, 12 mm × 12 mm
APPLICATIONS
Wireless infrastructure
LTE, TD-SCDMA, WiMAX, W-CDMA, CDMA2000, GSM
MIMO/transmit diversity
Digital high or low IF synthesis
GENERAL DESCRIPTION
The AD9148 is a quad, 16-bit, high dynamic range, digital-to-
analog converter (DAC) that provides a sample rate of 1000 MSPS.
These devices include features optimized for direct conversion
transmit applications, including gain, phase, and offset compen-
sation. The DAC outputs are optimized to interface seamlessly with
analog quadrature modulators such as the ADL5371/ ADL5372/
ADL5373/ADL5374/ADL5375. A serial peripheral interface (SPI)
is provided for programming of the internal device parameters.
Full-scale output current can be programmed over a range of 10 mA
to 30 mA. The devices operate from 1.8 V and 3.3 V supplies for
a total power consumption of 3 W at the maximum sample rate.
They are enclosed in 196-ball chip scale package ball grid array
with the option of an attached heat spreader.
PRODUCT HIGHLIGHTS
1.
Low noise and intermodulation distortion (IMD) enable
high quality synthesis of wideband signals from baseband
to high intermediate frequencies.
2.
A proprietary DAC output switching technique enhances
dynamic performance.
3.
The current outputs are easily configured for various
single-ended or differential circuit topologies.
4.
LVDS data input interface includes FIFO to ease input timing.
TYPICAL SIGNAL CHAIN
FPGA/ASIC/DSP
NOTES
1. AQM = ANALOG QUADRATURE MODULATOR.
DC
COMPLEX BASEBAND
COMPLEX IF
RF
fIF
LO ±
fIF
DAC1
DAC2
DIGITAL INTERPOLATION FILTERS
POST DAC
ANALOG FILTER
DAC3
DAC4
POST DAC
AQM
LO
AQM
↑2
↑2
↑2
↑2
↑2
↑2
↑2
↑2
↑2
↑2
↑2
↑2
PA
PA
LO
Figure 1.


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