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DAC5687 View Datasheet(PDF) - Texas Instruments

Part NameDescriptionManufacturer
DAC5687 16-BIT, 500 MSPS 2?8 INTERPOLATING DUAL-CHANNEL DIGITAL-TO-ANALOG CONVERTER (DAC) Texas-Instruments
Texas Instruments Texas-Instruments
DAC5687 Datasheet PDF : 80 Pages
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www.ti.com
HP8665B
Synthesized
Signal
Generator
3.3 V
Sinusoid
FREQ. = fdata
Agilent 8133A
Pulse Generator
PULSE
FREQ. = fdata
Ampl. = 1 VPP
0.01 µF 1:4
200
Mini Circuits
TCM4−1W
PULSE
FREQ. = fdata
16
Agilent 16702B
Mainframe System
With
16720A Pattern
Generator Card 16
CLK1
CLK1C
CLK2
CLK2C
PLLLOCK
DA[15:0]
DB[15:0]
TXENABLE
RESETB
DAC5687
SLWS164E – FEBRUARY 2005 – REVISED SEPTEMBER 2006
1.8 V/2.1 V
10 10 pF
EXTLO
EXTIO
BIASJ
IOUTA1
IOUTA2
IOUTB1
IOUTB2
IOVDD
IOGND
CEXTIO
0.1 µF
3.3 V
Rohde & Schwarz
FSQ8
Spectrum
Analyzer
RBIAS
1 k
100
3.3 V
1:4
100
Mini Circuits
T4−1
3.3 V
3.3 V
3.3 V
330 pF
3.3 V
0.033 µF 93.1
Figure 27. DAC5687 Test Configuration for PLL Clock Mode
B0039-02
WCDMA test-model-1 test vectors for the DAC5687 characterization were generated in accordance with the
3GPP Technical Specification. Chip-rate data was generated using the test-model-1 block in the Agilent ADS.
For multicarrier signals, different random seeds and PN offsets were used for each carrier. A Matlab™ script
performed pulse shaping, interpolation to the DAC input data rate, frequency offsets, rounding, and scaling. Each
test vector is 10 ms long, representing one frame. Special care is taken to assure that the end of the file wraps
smoothly to the beginning of the file.
The cumulative complementary distribution function (CCDF) for the 1-, 2-, and 4-carrier test vectors is shown in
Figure 28. The test vectors are scaled such that the absolute maximum data point is 0.95 (–0.45 dB) of full scale.
No peak reduction is used.
Copyright © 2005–2006, Texas Instruments Incorporated
Product Folder Link(s): DAC5687
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