ADV7172 View Datasheet(PDF) - Analog Devices

Part Name

Description

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ADV7172

Digital PAL/NTSC Video Encoder with Six DACs (10 Bits), Color Control and Enhanced Power Management

Analog Devices 

ADV7172/ADV7173

t3

SDATA

t5

t3

t6

t1

SCLOCK

t2

t7

t4

t8

Figure 1. MPU Port Timing Diagram

CLOCK

t9 t10

t12

CONTROL

I / PS

HSYNC,

FIELD/VSYNC,

BLANK

CONTROL

O / PS

PIXEL INPUT

DATA

Cb

Y

Cr

Y

Cb

Y

HSYNC,

FIELD/VSYNC,

BLANK,

CSO_HSO,

VSO, CLAMP

t11

t13

t14

Figure 2. Pixel and Control Data Timing Diagram

TTXREQ

t16

CLOCK

t17

TTX

t18

4 CLOCK

CYCLES

4 CLOCK

CYCLES

4 CLOCK

CYCLES

Figure 3. Teletext Timing Diagram

3 CLOCK

CYCLES

4 CLOCK

CYCLES

DAC Average Current Consumption

DAC D, E, F: The average current consumed by each DAC is the DAC output current as determined by RSET2/VREF (see Appendix 8).

DAC A, B, C: In normal power mode the average current consumed by each DAC is the DAC output current as determined by RSET1

(see Appendix 8).

In Low Power Mode the average current consumed by each DAC is approximately half the DAC output current as determined by RSET1.

Consult AN-551 for detailed information on ADV7172/ADV7173 power management.

–8–

REV. B

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