ADV7191 datasheet(12/69 Pages) AD

Part #	ADV7191

Description	Video Encoder with Six 10-Bit DACs and Video Encoder with Six DAC Outputs

Download	69 Pages

Scroll/Zoom	100%

Manufacturer	AD [Analog Devices]

Direct Link	http://www.analog.com

Logo

12 / 69 page

ADV7190/ADV7191

–12–

REV. 0

Programmable gamma correction is also available. Figure 6 shows

the response of different gamma values to a ramp signal.

250

200

150

100

50

0

300

SIGNAL OUTPUTS

SIGNAL

INPUT

0.5

GAMMA CORRECTION BLOCK OUTPUT

TO A RAMP INPUT FOR VARIOUS GAMMA VALUES

0

50

100

150

200

250

LOCATION

0.3

1.5

1.8

Figure 6. Signal Input (Ramp) and Selectable Gamma

Output Curves

The on-board SSAF (Super Subalias Filter) with extended

luminance frequency response and sharp stopband attenuation

enables studio quality video playback on modern TVs, giving

optimal horizontal line resolution. An additional sharpness

control feature allows high-frequency enhancement on the lumi-

nance signal.

The device is driven by a 27 MHz clock. Data can be output at

27 MHz or 54 MHz (on-board PLL) when 4

oversampling is

enabled. Also, the output filter requirements in 4

oversampling

and 2

oversampling differ, as can be seen in Figure 7.

–30dB

0dB

6.75MHz

13.5MHz

27.0MHz

40.5MHz

54.0MHz

2

FILTER

REQUIREMENTS

4

FILTER

REQUIREMENTS

Figure 7. Output Filter Requirements in 4

× Oversampling

Mode

ENCODER

CORE

2

I

N

T

E

R

P

O

L

A

T

I

O

N

6

D

A

C

O

U

T

P

U

T

S

54MHz

OUTPUT

RATE

ADV7190/ADV7191

PLL

54MHz

MPEG2

PIXEL BUS

27MHz

Figure 8. PLL and 4

× Oversampling Block Diagram

The ADV7190/ADV7191 also supports both PAL and NTSC

square pixel operation. In this case the encoder requires a

24.5454 MHz Clock for NTSC or 29.5 MHz Clock for PAL

square pixel mode operation. All internal timing is generated

on-chip.

An advanced power management circuit enables optimal control

of power consumption in normal operating modes or sleep modes.

The Output Video Frames are synchronized with the incoming

data Timing Reference Codes. Optionally, the Encoder accepts

(and can generate)

HSYNC, VSYNC, and FIELD timing signals.

These timing signals can be adjusted to change pulsewidth and

position while the part is in master mode.

HSO/CSO and VSO TTL outputs are also available and are timed

to the analog output video.

A separate teletext port enables the user to directly input teletext

data during the vertical blanking interval.

The ADV7190/ADV7191 also incorporates WSS and CGMS-A

data control generation and Macrovision Rev 7.1.

The ADV7190/ADV7191 modes are set up over a 2-wire

serial bidirectional port (I

2C-compatible) with two slave

addresses, and the device is register-compatible with the

ADV7172/ADV7173.

The ADV7190ADV7191 is packaged in a 64-lead LQFP

package.

DATA PATH DESCRIPTION

For PAL B, D, G, H, I, M, N, and NTSC M, N modes, YCrCb

4:2:2 Data is input via the CCIR-656/601-compatible Pixel

Port at a 27 MHz data rate. The pixel data is demultiplexed to

form three data paths. Y typically has a range of 16 to 235, Cr

and Cb typically have a range of 128+/–112; however, it is

possible to input data from 1 to 254 on both Y, Cb, and Cr.

The ADV7190/ADV7191 supports PAL (B, D, G, H, I, N, M)

and NTSC M, N (with and without Pedestal) and PAL60 stan-

dards. Digital Noise Reduction can be applied to the Y signal.

Programmable gamma correction can also be applied to the Y

signal if required.

The Y data can be manipulated for contrast control and a set-up

level can be added for brightness control. The Cr, Cb data can

be scaled to achieve color saturation control. All settings become

effective at the start of the next ﬁeld when double buffering is

enabled.

The appropriate sync, blank, and burst levels are added to the

YCrCb data. Macrovision antitaping, (ADV7190 only) Closed-

Captioning, and Teletext levels are also added to Y and the

resultant data is interpolated to 54 MHz when 4

× Oversampling

is enabled. The interpolated data is ﬁltered and scaled by three

digital FIR ﬁlters.

The U and V signals are modulated by the appropriate Subcarrier

Sine/Cosine waveforms and a phase offset may be added onto

the color subcarrier during active video to allow hue adjustment.

The resulting U and V signals are added together to make up

the Chrominance Signal. The Luma (Y) signal can be delayed

by up to six clock cycles (at 27 MHz) and the Chroma signal

can be delayed by up to eight clock cycles (at 27 MHz). The

Luma and Chroma Signals are added together to make up the

Composite Video Signal. All timing signals are controlled.

The YCrCb data is also used to generate RGB data with appropri-

ate sync and blank levels. The YUV levels are scaled to output

the suitable SMPTE/EBU N10, MII, or Betacam levels.

Similar Part No. - ADV7191

Manufacturer	Part #	Datasheet	Description
Analog Devices	ADV7191	626Kb / 72P	Video Encoders with Six 10-Bit DACs and 54 MHz Oversampling REV. B
	ADV7191KST	626Kb / 72P	Video Encoders with Six 10-Bit DACs and 54 MHz Oversampling REV. B
	ADV7191KSTZ	626Kb / 72P	Video Encoders with Six 10-Bit DACs and 54 MHz Oversampling REV. B
	ADV7191	626Kb / 72P	Video Encoders with Six 10-Bit DACs and 54 MHz Oversampling REV. B

More results

Similar Description - ADV7191

Manufacturer	Part #	Datasheet	Description
Analog Devices	ADV7172	469Kb / 60P	Digital PAL/NTSC Video Encoder with Six DACs REV. B
	ADV7173	469Kb / 60P	Digital PAL/NTSC Video Encoder with Six DACs REV. B
	ADV7340	1Mb / 108P	Multiformat Video Encoder, Six 12-Bit Noise Shaped Video DACS Rev. C
	ADV7344	2Mb / 108P	Multiformat Video Encoder Six 14-Bit Noise Shaped Video DACs REV. B
	ADV7344	1Mb / 88P	Multiformat Video Encoder Six 14-Bit Noise Shaped Video DACs REV. 0
	ADV7341	1Mb / 108P	Multiformat Video Encoder, Six 12-Bit Noise Shaped Video DACS Rev. C
	ADV7314	1Mb / 84P	Multiformat 216 MHz Video Encoder with Six NSV 14-Bit DACs REV. 0
	ADV7310	1Mb / 84P	Multiformat 216 MHz Video Encoder with Six NSV 12-Bit DACs REV. A
	ADV7321	1Mb / 88P	Multiformat 216 MHz Video Encoder with Six NSV 12-Bit DACs REV. A
	ADV7311	1Mb / 84P	Multiformat 216 MHz Video Encoder with Six NSV 12-Bit DACs REV. A

More results

ADV7191 Datasheet(PDF) 12 Page - Analog Devices

ADV7191 Datasheet(HTML) 12 Page - Analog Devices

Similar Part No. - ADV7191

Similar Description - ADV7191

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69

Datasheet Download

Link URL