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DAC5686IPZP Datasheet

  • DAC5686IPZP

  • 16-BIT, 500-MSPS, 2X16X INTERPOLATING DUAL-CHANNEL DIGITAL-T...

  • 1328.46KB

  • 46页

  • TI

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DAC5686
www.ti.com
SLWS147B 鈥?APRIL 2003 鈥?REVISED AUGUST 2004
16-BIT, 500-MSPS, 2脳鈥?6脳 INTERPOLATING DUAL-CHANNEL DIGITAL-TO-ANALOG
CONVERTER
FEATURES
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500 MSPS Maximum Update Rate DAC
WCDMA ACPR
鈥?1 Carrier: 76 dB Centered at 30.72-MHz IF,
245.76 MSPS
鈥?1 Carrier: 73 dB Centered at 61.44-MHz IF,
245.76 MSPS
鈥?2 Carrier: 72 dB Centered at 30.72-MHz IF,
245.76 MSPS
鈥?4 Carrier: 64 dB Centered at 92.16-MHz IF,
491.52 MSPS
Selectable 2脳, 4脳, 8脳, and 16脳 Interpolation
鈥?Linear Phase
鈥?0.05-dB Pass-Band Ripple
鈥?80-dB Stop-Band Attenuation
鈥?Stop-Band Transition 0.4鈥?.6 f
DATA
32-Bit Programmable NCO
On-Chip 2脳鈥?6脳 PLL Clock Multiplier With
Bypass Mode
Differential Scalable Current Outputs: 2 mA to
20 mA
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On-Chip 1.2-V Reference
1.8-V Digital and 3.3-V Analog Supplies
1.8-V/3.3-V CMOS Compatible Interface
Power Dissipation: 950 mW at Full Maximum
Operating Conditions
Package: 100-Pin HTQFP
APPLICATIONS
Cellular Base Transceiver Station Transmit
Channel
鈥?CDMA: W-CDMA, CDMA2000, IS-95
鈥?TDMA: GSM, IS-136, EDGE/UWC-136
Baseband I and Q Transmit
Input Interface: Quadrature Modulation for
Interfacing With Baseband Complex Mixing
ASICs
Single-Sideband Up-Conversion
Diversity Transmit
Cable Modem Termination System
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DESCRIPTION
The DAC5686 is a dual-channel 16-bit high-speed digital-to-analog converter (DAC) with integrated 2脳, 4脳, 8脳,
and 16脳 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.
Unmatched gains and offsets at the RF quadrature modulator result in unwanted sideband and local oscillator
feedthrough. Each DAC in the DAC5686 has an 11-bit offset adjustment and 12-bit gain adjustment, which
compensate for quadrature modulator input imbalances, thus reducing RF filtering requirements.
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.
PowerPAD is a trademark of Texas Instruments.
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright 漏 2003鈥?004, Texas Instruments Incorporated

DAC5686IPZP 产品属性

  • Data Converter Basics

  • 90

  • 集成电路 (IC)

  • 数据采集 - 数模转换器

  • -

  • 12ns

  • 16

  • 并联

  • 2

  • 模拟和数字

  • 950mW

  • -40°C ~ 85°C

  • 表面贴装

  • 100-TQFP 裸露焊盘

  • 100-HTQFP（14x14）

  • 托盘

  • 4 电流，单极

  • 500M

  • 296-31328-ND - MODULE PATTERN GENERATOR BOARD296-17515-ND - EVALUATION MODULE FOR DAC5686

  • 296-16695-5

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