DAC5687-EP Datasheet, PDF (1/75 Pages) Texas Instruments – 16-BIT 500-MSPS 2´–8´ INTERPOLATING DUAL-CHANNEL DIGITAL-TO-ANALOG CONVERTER (DAC)

DAC5687-EP
www.ti.com
16-BIT 500-MSPS 2×–8× INTERPOLATING DUAL-CHANNEL
DIGITAL-TO-ANALOG CONVERTER (DAC)
SGLS333 – JUNE 2006
FEATURES
• Controlled Baseline
– One Assembly
– One Test Site
– One Fabrication Site
• Extended Temperature Performance of
–55°C to 125°C
• Enhanced Diminishing Manufacturing
Sources (DMS) Support
• Enhanced Product-Change Notification
• Qualification Pedigree ⁽¹⁾
• 500 MSPS
• Selectable 2×–8× Interpolation
• On-Chip PLL/VCO Clock Multiplier
• Full IQ Compensation Including Offset, Gain,
and Phase
• Flexible Input Options
– FIFO With Latch on External or Internal
Clock
– Even/Odd Multiplexed Input
– Single-Port Demultiplexed Input
• Complex Mixer With 32-Bit Numerically
Controlled Oscillator (NCO)
• Fixed-Frequency Mixer With Fs/4 and Fs/2
• 1.8-V or 3.3-V I/O Voltage
• On-Chip 1.2-V Reference
• Differential Scalable Output: 2 mA to 20 mA
• Pin Compatible to DAC5686
• High Performance
– 81-dBc Adjacent Channel Leakage Ratio
(ACLR) WCDMA TM1 at 30.72 MHz
– 72-dBc ACLR WCDMA TM1 at 153.6 MHz
• Package: 100-Pin HTQFP
(1) Component qualification in accordance with JEDEC and
industry standards to ensure reliable operation over an
extended temperature range. This includes, but is not limited
to, Highly Accelerated Stress Test (HAST) or biased 85/85,
temperature cycle, autoclave or unbiased HAST,
electromigration, bond intermetallic life, and mold compound
life. Such qualification testing should not be viewed as
justifying use of this component beyond specified
performance and environmental limits.
APPLICATIONS
• Cellular Base Transceiver Station Transmit
Channel
– CDMA: W-CDMA, CDMA2000, TD-SCDMA
– TDMA: GSM, IS-136, EDGE/UWC-136
– OFDM: 802.16
• Cable Modem Termination System
DESCRIPTION
The DAC5687 is a dual-channel 16-bit high-speed
digital-to-analog converter (DAC) with integrated 2×,
4×, and 8× interpolation filters, a complex numerically
controlled oscillator (NCO), on-board clock multiplier,
IQ compensation, and on-chip voltage reference.
The DAC5687 is pin compatible to the DAC5686,
requiring only changes in register settings for most
applications, and offers additional features and
superior linearity, noise, crosstalk, and phase-locked
loop (PLL) noise performance.
The DAC5687 has six signal processing blocks: two
interpolate by two digital filters, a fine-frequency
mixer with 32-bit NCO, a quadrature modulation
compensation block, another interpolate by two
digital filter, and a coarse-frequency mixer with Fs/2
or Fs/4. The different modes of operation enable or
bypass the signal processing blocks.
The coarse and fine mixers can be combined to span
a wider range of frequencies with fine resolution. The
DAC5687 allows both complex or real output.
Combining the frequency upconversion and complex
output produces a Hilbert Transform pair that is
output from the two DACs. An external RF
quadrature modulator then performs the final single
sideband upconversion.
The IQ compensation feature allows optimization of
phase, gain, and offset to maximize sideband
rejection and minimize LO feedthrough for an analog
quadrature modulator.
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.
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 © 2006, Texas Instruments Incorporated