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DAC5688_10

更新时间： 2024-11-21 06:52:15
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德州仪器 - TI 转换器
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55页 1371K
描述
DUAL-CHANNEL, 16-BIT, 800 MSPS, 2x-8x INTERPOLATING DIGITAL-TO-ANALOG CONVERTER (DAC)

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DAC5688  
www.ti.com  
SLLS880B –DECEMBER 2007–REVISED MAY 2010  
DUAL-CHANNEL, 16-BIT, 800 MSPS, 2x–8x INTERPOLATING  
DIGITAL-TO-ANALOG CONVERTER (DAC)  
Check for Samples: DAC5688  
1
FEATURES  
DESCRIPTION  
•
Dual, 16-Bit, 800 MSPS DACs  
The DAC5688 is a dual-channel 16-bit 800 MSPS  
digital-to-analog converter (DAC) with dual CMOS  
digital data bus, integrated 2x-8x interpolation filters,  
•
Dual, 16-Bit, 250 MSPS CMOS Input Data  
–
–
16 Sample Input FIFO  
a
fine frequency mixer with 32-bit complex  
Flexible input data bus options  
numerically controlled oscillator (NCO), on-board  
clock multiplier, IQ compensation, and internal  
voltage reference. Different modes of operation  
enable or bypass various signal processing blocks.  
The DAC5688 offers superior linearity, noise,  
crosstalk and PLL phase noise performance.  
•
High Performance  
81 dBc ACLR WCDMA TM1 at 70 MHz  
–
•
•
2x-32x Clock Multiplying PLL/VCO  
Selectable 2x–8x Interpolation Filters  
–
Stop-band Attenuation > 80 dB  
The DAC5688 dual CMOS data bus provides 250  
MSPS input data transfer per DAC channel. Several  
input data options are available: dual-bus data,  
single-bus interleaved data, even and odd  
multiplexing at half-rate, and an input FIFO with either  
external or internal clock to ease interface timing.  
Input data can interpolated 2x, 4x or 8x by on-board  
digital interpolating FIR filters with over 80 dB of  
stop-band attenuation.  
•
•
Complex Mixer with 32-Bit NCO  
Digital Quadrature Modulator Correction  
–
Gain, Phase and Offset Correction  
•
•
•
•
•
Digital Inverse SINC Filter  
3- or 4-Wire Serial Control Interface  
On Chip 1.2-V Reference  
Differential Scalable Output: 2 to 20 mA  
Package: 64-pin 9×9mm QFN  
The DAC5688 allows both complex or real output. An  
optional 32-bit NCO/mixer in complex mode provides  
frequency upconversion and the dual DAC output  
produces a complex Hilbert Transform pair. A digital  
Inverse SINC filter compensates for natural DAC  
sin(x)/x frequency roll-off. The digital Quadrature  
Modulator Correction (QMC) feature allows IQ  
compensation of phase, gain and offset to maximize  
sideband rejection and minimize LO feed-through of  
an external quadrature modulator performing the final  
single sideband RF up-conversion.  
APPLICATIONS  
•
•
•
•
•
Cellular Base Stations  
Broadband Wireless Access (BWA)  
WiMAX 802.16  
Fixed Wireless Backhaul  
Cable Modem Termination System (CMTS)  
The DAC5688 is pin compatible with the DAC5689  
which does not include a clock-multiplying PLL. The  
DAC5688 is characterized for operation over the  
industrial temperature range of –40°C to 85°C and is  
available in a 64-pin 9x9mm QFN package.  
ORDERING INFORMATION(1)  
Order Code  
TA = –40°C to 85°C  
Package Qty  
Tape and Reel Format  
Package  
Drawing/Type(2) (3)  
DAC5688IRGCT  
DAC5688IRGCR  
250  
RGC / 64QFN Quad Flatpack No-Lead  
2000  
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI  
website at www.ti.com.  
(2) Thermal Pad Size: 7,4 mm × 7,4 mm  
(3) MSL Peak Temperature: Level-3-260C-168 HR  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas  
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
PRODUCTION DATA information is current as of publication date.  
Copyright © 2007–2010, Texas Instruments Incorporated  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
 
 
 
 
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