DAC39RF10 datasheet(96/232 Pages) TI2

96 / 232 page

CLK+

CLK–

DAC Output

(Sine Wave)

+VFS

-VFS

TS = 1/FCLK

tpd

TS /2

Figure 7-7. RF Mode Timing Diagram

FOUT/FCLK

0.5

1.5

2.5

-50

-45

-40

-35

-30

-25

-20

-15

-10

-5

Figure 7-8. RF Mode Output Frequency Response

7.3.1.4 DES Mode

Dual edge sampling (DES) mode outputs unique samples on both the rising and falling edge of CLK, doubling

the sample rate for the same clock frequency. An extra digital interpolate by 2 stage is included in the device to

enable a double sample rate.

An non-50% CLK duty cycle results in an image of the signal at FCLK - FOUT. Compared to NRZ mode with

the same clock frequency, DES mode provides significant reduction in the image amplitude, reducing filter

requirements. There are three DES modes: DES1X, DES2XL and DES2XH. DES1X mode also allows 15.52

or 20.8GSPS of unique data in 12-bit and 8-bit single channel mode, supporting 7.68GHz or 10.4GHz of signal

bandwidth. DES2XL uses an low pass 2x interpolation filter to increase from the single edge sample rate to dual

edge sample rate, and supports output frequencies between 0 - 0.4*FCLK with up to 4.16GHz of signal BW).

DES2XH uses a high pass interpolation filter, supporting output frequencies between 0.6 - 1.0*FCLK with the

same signal BW as DES2XL.

DAC39RF10-SP, DAC39RF10-SEP

DAC39RFS10-SP, DAC39RFS10-SEP

SBAS932A – MARCH 2024 – REVISED FEBRUARY 2026

www.ti.com

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

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