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DAC5688IRGCR-DAC5688IRGCRG4
16-bit, 800 MSPS 2x-8x Interpolating Dual-Channel Digital-to-Analog Converter with integrated PLL
DAC5688
www.ti.com SLLS880C –DECEMBER 2007–REVISED AUGUST 2010
DUAL-CHANNEL, 16-BIT, 800 MSPS, 2x–8x INTERPOLATING
DIGITAL-TO-ANALOG CONVERTER (DAC)
Checkfor Samples: DAC5688
1FEATURES DESCRIPTION Dual, 16-Bit, 800 MSPS DACs The DAC5688isa dual-channel 16-bit 800 MSPS
digital-to-analog converter (DAC) with dual CMOS
• Dual, 16-Bit, 250 MSPS CMOS Input Datadigital data bus, integrated 2x-8x interpolation filters,
– 16 Sample Input FIFO a fine frequency mixer with 32-bit complex
– Flexible input data bus options numerically controlled oscillator (NCO), on-board
High Performance clock multiplier, IQ compensation, and internal
voltage reference. Different modes of operation
– 81 dBc ACLR WCDMA TM1at70 MHz enableor bypass various signal processing blocks.
• 2x-32x Clock Multiplying PLL/VCO The DAC5688 offers superior linearity, noise,
Selectable 2x–8x Interpolation Filters crosstalk and PLL phase noise performance.
Stop-band Attenuation>80 dB The DAC5688 dual CMOS data bus provides 250
Complex Mixer with 32-Bit NCO MSPS input data transfer per DAC channel. Several
input data options are available: dual-bus data,
• Digital Quadrature Modulator Correction single-bus interleaved data, even and odd
– Gain, Phase and Offset Correction multiplexingat half-rate, andan input FIFO with either
Digital Inverse SINC Filter external or internal clockto ease interface timing.
Input data can interpolated 2x,4xor 8xby on-board
• 3-or 4-Wire Serial Control Interface digital interpolating FIR filters with over 80 dBof
• On Chip 1.2-V Reference stop-band attenuation.
• Differential Scalable Output:2to 20 mA The DAC5688 allows both complexor real output. An
• Package: 64-pin 9×9mm QFN optional 32-bit NCO/mixerin complex mode provides
frequency upconversion and the dual DAC output
APPLICATIONS producesa complex Hilbert Transform pair.A digital
Inverse SINC filter compensates for natural DAC
• Cellular Base Stationssin(x)/x frequency roll-off. The digital Quadrature
• Broadband Wireless Access (BWA) Modulator Correction (QMC) feature allows IQ
• WiMAX 802.16 compensationof phase, gain and offsetto maximize
• Fixed Wireless Backhaul sideband rejection and minimize LO feed-throughof
• Cable Modem Termination System (CMTS) an external quadrature modulator performing the final
single sideband RF up-conversion.
The DAC5688is pin compatible with the DAC5689
which does not includea clock-multiplying PLL. The
