DAC5682Z
www.ti.com ........................................................................................................................................................ SLLS853C–AUGUST 2007–REVISED JUNE 2009
16-BIT, 1.0 GSPS 2x-4x INTERPOLATING DUAL-CHANNEL
DIGITAL-TO-ANALOG CONVERTER (DAC)
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FEATURES
DESCRIPTION
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16-Bit Digital-to-Analog Converter (DAC)
1.0 GSPS Update Rate
The DAC5682Z is a dual-channel 16-bit 1.0 GSPS
digital-to-analog converter (DAC) with wideband
LVDS data input, integrated 2x/4x interpolation filters,
on-board clock multiplier and internal voltage
reference. The DAC5682Z offers superior linearity,
noise, crosstalk and PLL phase noise performance.
16-Bit Wideband Input LVDS Data Bus
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8 Sample Input FIFO
Interleaved I/Q data for Dual-DAC Mode
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High Performance
73 dBc ACLR WCDMA TM1 at 180 MHz
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The DAC5682Z integrates a wideband LVDS port
with on-chip termination. Full-rate input data can be
transferred to a single DAC channel, or half-rate and
1/4-rate input data can be interpolated by on-board
2x or 4x FIR filters. Each interpolation FIR is
configurable in either Low-Pass or High-Pass mode,
allowing selection of a higher order output spectral
image. An on-chip delay lock loop (DLL) simplifies
LVDS interfacing by providing skew control for the
LVDS input data clock.
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2x-32x Clock Multiplying PLL/VCO
2x or 4x Interpolation Filters
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Stopband Transition 0.4–0.6 Fdata
Filters Configurable in Either Low-Pass or
High-Pass Mode
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Allows Selection of Higher Order Image
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Fs/4 Coarse Mixer
On Chip 1.2 V Reference
The DAC5682Z allows both complex or real output.
An optional Fs/4 coarse mixer in complex mode
provides coarse frequency upconversion and the dual
DAC output produces a complex Hilbert Transform
pair. An external RF quadrature modulator then
performs the final single sideband up-conversion.
Differential Scalable Output: 2 to 20 mA
Package: 64-Pin 9 × 9 mm QFN
APPLICATIONS
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Cellular Base Stations
Broadband Wireless Access (BWA)
WiMAX 802.16
Fixed Wireless Backhaul
Cable Modem Termination System (CMTS)
The DAC5682Z is characterized for operation over
the industrial temperature range of –40°C to 85°C
and is available in a 64-pin QFN package. Other
single-channel members of the family include the
interpolating DAC5681Z
DAC5681.
and non-interpolating
ORDERING INFORMATION
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ORDER CODE
DAC5682ZIRGCT
DAC5682ZIRGCR
PACKAGE DRAWING/TYPE(1)(2)(3)
TRANSPORT MEDIA
Tape and Reel
QUANTITY
250
RGC / 64QFN Quad Flatpack
No-Lead
–40°C to 85°C
Tape and Reel
2000
(1) Thermal Pad Size: 7,4 mm × 7,4 mm
(2) MSL Peak Temperature: Level-3-260C-168 HR
(3) 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.
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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 © 2007–2009, 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.