DM504 datasheet(199/211 Pages) TI1

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cvideo_vfb

Reconstruction

Filter

~9.5 MHz

(A)

Amplifier

3.7 V/V

(B)

75 W

OUT

cvideo_tvout

cvideo_vfb

Reconstruction

Filter

~9.5 MHz

(A)

(B)

xi_oscj

vssa_oscj

Device

xo_oscj

Crystal

(Optional)

SPRS91v_PCB_CLK_OSC_03

199

DM504

www.ti.com

SPRS977A – NOVEMBER 2016 – REVISED JANUARY 2017

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Applications, Implementation, and Layout

(1)

j in *_osc = 0 or 1

Figure 7-22. Grounding Scheme for High-Frequency Clock

7.7

CVIDEO/SD-DAC Guidelines and Electrical Data/Timing

The device's analog video CVIDEO/SD-DAC TV analog composite output can be operate in one of two

modes: Normal mode and TVOUT Bypass mode. In Normal mode, the device’s internal video amplifier is

used. In TVOUT Bypass mode, the internal video amplifier is bypassed and an external amplifier is

required.

Figure 7-23 shows a typical circuit that permits connecting the analog video output from the device to

standard 75-Ω impedance video systems in Normal mode.

Reconstruction Filter (optional)

AC coupling capacitor (optional)

Figure 7-23. TV Output (Normal Mode)

Figure 7-24 shows a typical circuit that permits connecting the analog video output from the device to

standard 75-Ω impedance video systems in TVOUT Bypass mode.

Reconstruction Filter (optional). Note: An amplifier with an integrated reconstruction filter can alternatively be used

instead of a discrete reconstruction filter.

AC coupling capacitor (optional)

Figure 7-24. TV Output (TVOUT Bypass Mode)

DM504 Datasheet(PDF) 199 Page - Texas Instruments

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