DAC39RF10 datasheet(207/232 Pages) TI2

207 / 232 page

The NLFM Chirp frequency ramp is shown in Figure 9-13, complex time domain baseband waveform inFigure

9-14, baseband frequency spectrum in Figure 9-15 and auto-correlation in Figure 9-16.

Time (samples)

500

1000 1500 2000 2500 3000 3500 4000 4500

3100

3120

3140

3160

3180

3200

3220

3240

3260

3280

3300

Figure 9-13. NLFM Frequency Ramp

Figure 9-14. Complex Time Domain of NLFM Chirp

(Red = real, Black = imag)

Frequency (MHz)

-125 -100 -75

-50

-25

100 125

-60

-50

-40

-30

-20

-10

Figure 9-15. Digital Spectrum for NLFM Chirp

Time (fraction of pulse time)

-0.05 -0.04 -0.03 -0.02 -0.01

0.01 0.02 0.03 0.04 0.05

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

Figure 9-16. Auto-correlation of NLFM Chirp

The output spectra for the NLFM Chirp at 3.2GHz is shown in Figure 9-17. The largest spur is the duty-cycle

image at 4.8GHz, which is suppressed 50dB. Figure 9-18 shows a 1GHz span centered at 3.2GHz. The

interpolation filters confine the output spectrum to a 250MHz wide band at 3.2GHz. The spectra purity of the

200MHz is shown with a full scale tone in Figure 9-19. The largest spurs are

≅ 80dBc at 3.16GHz, which is the

4th harmonic (aliased back into 1st Nyquist zone), and the 6th harmonic at

≅ 86dBc.

www.ti.com

DAC39RF10-SP, DAC39RF10-SEP

DAC39RFS10-SP, DAC39RFS10-SEP

SBAS932A – MARCH 2024 – REVISED FEBRUARY 2026

Submit Document Feedback

207

Product Folder Links: DAC39RF10-SP DAC39RF10-SEP DAC39RFS10-SP DAC39RFS10-SEP

DAC39RF10 Datasheet(PDF) 207 Page - Texas Instruments

DAC39RF10 Datasheet(HTML) 207 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL