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DAC39RFS10 Scheda tecnica(PDF) 64 Page - Texas Instruments

Il numero della parte DAC39RFS10
Spiegazioni elettronici  DDS39RF12 and DDS39RFS12, 12GSPS to 24GSPS, Dual and Single Channel, Multi- Nyquist Direct Digital Synthesizer (DDS)
PDF  177 Pages
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Produttore elettronici  TI2 [Texas Instruments]
Homepage  https://www.ti.com
Logo TI2 - Texas Instruments

DAC39RFS10 Scheda tecnica(HTML) 64 Page - Texas Instruments

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0
DUC_GAIN0
DUC0
sum
saturate
round
0
DUC_GAIN1
DUC1
0
DUC_GAIN2
0
DUC_GAIN3
2
DESDAC
DAC
DUC2(I) or DUC0(Q)
DUC3(I) or DUC1(Q)
DAC_SRCx[1]
DAC_SRCx[0]
DAC_SRCx[2]
DAC_SRCx[3]
Figure 7-47. Channel Bonder Block Diagram
7.3.6.3 DES Interpolator
The output of the summation block or the non-interpolated input signal can optionally be interpolated by 2x by
the DES interpolator to double the sample rate for DES2XL and DES2XH output modes. The DES interpolator
has a passband bandwidth of 80%, stopband attenuation of 54dB and ripple less than ±0.02dB. The DES
interpolator can operate as high pass (DES2XH) or low pass (DES2XL) with an inverted spectrum. The DES2X
filter coefficients are listed in Table 7-14 and the responses are shown in Figure 7-48, with the passband ripple
for DES2XL shown in Figure 7-49.The sample rate after interpolation is 2*fCLK due to having samples on both
the rising and falling edges, so the x-axis in Figure 7-48 covers the Nyquist zone.
Table 7-14. DES2X Filter Coefficients
Filter
Coefficients (center tap is in bold)
DES2X
[-9 0 19 0 -39 0 70 0 -122 0 211 0 -403 0 1293 2048 1293 0 -403 0 211 0 -122 0 70 0 -39 0 19 0 -9 ]*2-11
DDS39RF12, DDS39RFS12
SBASB21 – SEPTEMBER 2024
www.ti.com
64
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Product Folder Links: DDS39RF12 DDS39RFS12



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