TLV5734

TRIPLE 8BIT 30MSPS ADC WITH HIGH

PRECISION CLAMP FOR YUV/RGB VIDEO

SLES026A − APRIL 2002 − REVISED JANUARY 2003

8

POST OFFICE BOX 655303

clamp function (continued)

Table 2. Clamp Operation

ADC_OUT

CLP_OE

CLP_OUT

BUFFER

RC

<REF

1

HIGH

H

Charge

= REF

0

HIGH

Z

Hold

> REF

1

LOW

L

Discharge

AIN

A

EXTCLP

B

Active Video

Figure 3. Clamp Timing Diagram

Table 3. Clamp Timing

TIME INTERVAL

NTSC 4fsc = 14.318 MHz

PAL 4fsc = 17.745 MHz

BT 601

× 2 = 27 MHz (NTSC)

A (Min.)

8 clocks (0.56

µs)

8 clocks (0.45

µs)

16 clocks (0.59

µs)

B (Min.)

16 clocks (1.12

µs)

16 clocks (0.90

µs)

32 clocks (1.19

µs)

output data format

The TLV5734 can select three output data formats for different video data processing by the combination of

MODE0 and MODE1 (see Table 4). The output is synchronous with the rising edge of CLK that comes after INIT

is pulled high. Timing diagrams and output data tables for formats 1, 2, and 3 are shown in Figure 4 through

Figure 6 and Table 5 through Table 7.

Table 4. Output Data Format Selection

CONDITION

OUTPUT DATA

MODE 1

MODE 0

OUTPUT DATA FORMAT

RATIO OF Y:U:V

L

L

Format 1

4:1:1

L

H

Format 2

4:4:4

H

L

Format 3

4:2:2

H

H

Not used

N/A