ADV7172 datasheet(6/59 Pages) AD

Il numero della parte	ADV7172

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

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Produttore elettronici	AD [Analog Devices]

Homepage	http://www.analog.com

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ADV7172/ADV7173

–6–

REV. A

5 V TIMING SPECIFICATIONS

(VAA = +5 V

5%1, VREF = 1.235 V, RSET1 = 600

unless otherwise noted. All specifications

TMIN to TMAX

2 unless otherwise noted.)

Parameter

Conditions

Min

Typ

Max

Units

MPU PORT3, 4

SCLOCK Frequency

0

400

kHz

SCLOCK High Pulsewidth, t1

0.6

µs

SCLOCK Low Pulsewidth, t2

1.3

µs

Hold Time (Start Condition), t3

After this period the 1st clock is generated

0.6

µs

Setup Time (Start Condition), t4

relevant for repeated Start Condition.

0.6

µs

Data Setup Time, t5

100

ns

SDATA, SCLOCK Rise Time, t6

300

ns

SDATA, SCLOCK Fall Time, t7

300

ns

Setup Time (Stop Condition), t8

0.6

µs

ANALOG OUTPUTS

3, 5

Analog Output Delay

7ns

DAC Analog Output Skew

0

ns

CLOCK CONTROL AND

PIXEL PORT

5, 6

fCLOCK

27

MHz

Clock High Time, t9

8ns

Clock Low Time, t10

8ns

Data Setup Time, t11

4.0

ns

Data Hold Time, t12

5.0

ns

Control Setup Time, t11

4ns

Control Hold Time, t12

3ns

Digital Output Access Time, t13

15

24

ns

Digital Output Hold Time, t14

10

ns

Pipeline Delay, t15

37

Clock Cycles

TELETEXT PORT3, 7

Digital Output Access Time, t16

20

ns

Data Setup Time, t17

2ns

Data Hold Time, t18

6ns

RESET CONTROL3

RESET Low Time

3ns

NOTES

1The max/min specifications are guaranteed over this range. The max/min values are typical over 4.75 V to 5.25 V range.

2Temperature range T

MIN to TMAX: 0 °C to +70 °C.

3TTL input values are 0 to 3 volts, with input rise/fall times

≤ 3 ns, measured between the 10% and 90% points. Timing reference points at 50% for inputs and

outputs. Analog output load

≤ 10 pF.

4Guaranteed by characterization.

5Output delay measured from the 50% point of the rising edge of CLOCK to the 50% point of full-scale transition.

6Pixel Port consists of the following:

Pixel Inputs:

P7–P0

Pixel Controls:

HSYNC, FIELD/VSYNC, BLANK, VSO, CSO_HSO, CLAMP

Clock Input:

CLOCK

7Teletext Port consists of the following:

Teletext Output:

TTXREQ

Teletext Input:

TTX

Specifications subject to change without notice.

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