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DAC5686 数据表(PDF) 1 Page - Texas Instruments

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部件名 DAC5686
功能描述  16-BIT, 500-MSPS, 216 INTERPOLATING DUAL-CHANNEL DIGITAL-TO-ANALOG CONVERTER
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

DAC5686 数据表(HTML) 1 Page - Texas Instruments

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FEATURES
APPLICATIONS
DESCRIPTION
DAC5686
www.ti.com ............................................................................................................................................................ SLWS147F – APRIL 2003 – REVISED JUNE 2009
16-BIT, 500-MSPS, 2×–16× INTERPOLATING DUAL-CHANNEL
DIGITAL-TO-ANALOG CONVERTER
• 1.8-V Digital and 3.3-V Analog Supplies
234
• 500-MSPS Maximum-Update-Rate DAC
• 1.8-V/3.3-V CMOS-Compatible Interface
• WCDMA ACPR
• Power Dissipation: 950 mW at Full Maximum
Operating Conditions
1 Carrier: 76 dB Centered at 30.72-MHz IF,
245.76 MSPS
• Package: 100-Pin HTQFP
1 Carrier: 73 dB Centered at 61.44-MHz IF,
245.76 MSPS
• Cellular Base Transceiver Station Transmit
2 Carrier: 72 dB Centered at 30.72-MHz IF,
Channel
245.76 MSPS
CDMA: W-CDMA, CDMA2000, IS-95
4 Carrier: 64 dB Centered at 92.16-MHz IF,
TDMA: GSM, IS-136, EDGE/UWC-136
491.52 MSPS
• Baseband I and Q Transmit
• Selectable 2×, 4×, 8×, and 16× Interpolation
• Input Interface: Quadrature Modulation for
Linear Phase
Interfacing With Baseband Complex Mixing
0.05-dB Pass-Band Ripple
ASICs
80-dB Stop-Band Attenuation
• Single-Sideband Up-Conversion
• Diversity Transmit
Stop-Band Transition 0.4–0.6 fDATA
• Cable Modem Termination System
• 32-Bit Programmable NCO
• On-Chip 2×–16× PLL Clock Multiplier With
Bypass Mode
• Differential Scalable Current Outputs: 2 mA to
20 mA
• On-Chip 1.2-V Reference
The DAC5686 is a dual-channel 16-bit high-speed digital-to-analog converter (DAC) with integrated 2×, 4×, 8×,
and 16× interpolation filters, a numerically controlled oscillator (NCO), onboard clock multiplier, and on-chip
voltage reference. The DAC5686 has been specifically designed to allow for low input data rates between the
DAC and ASIC, or FPGA, and high output transmit intermediate frequencies (IF). Target applications include
high-speed digital data transmission in wired and wireless communication systems and high-frequency
direct-digital synthesis DDS.
The DAC5686 provides three modes of operation: dual-channel, single-sideband, and quadrature modulation. In
dual-channel mode, interpolation filtering increases the DAC update rate, which reduces sinx/x rolloff and
enables the use of relaxed analog post-filtering.
Single-sideband mode provides an alternative interface to the analog quadrature modulators. Channel carrier
selection is performed at baseband by mixing in the ASIC/FPGA. Baseband I and Q from the ASIC/FPGA are
input to the DAC5686, which in turn performs a complex mix resulting in Hilbert transform pairs at the outputs of
the DAC5686's two DACs. An external RF quadrature modulator then performs the final single-sideband
up-conversion. The DAC5686's complex mixing frequencies are flexibly chosen with the 32-bit programmable
NCO.
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.
2
PowerPAD is a trademark of Texas Instruments.
3
Excel is a trademark of Microsoft Corporation.
4
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2003–2009, 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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