LT6550 datasheet(14/16 Pages) LINER

14 / 16 page

LT6550/LT6551

65501f

–

450

Ω

450

Ω

–

450

Ω

450

Ω

–

450

Ω

450

Ω

1070

Ω

549

Ω

2940

Ω

174

Ω

LT6550

261

Ω

–3.3V

3.3V

–

450

Ω

450

Ω

–

450

Ω

450

Ω

–

450

Ω

450

Ω

105

Ω

133

Ω

LT6550

–3.3V

6550/51 TAO3

Y = 0.299R + 0.587G + 0.114B

PB = 0.565(B – Y)

PR = 0.713(R – Y)

f3dB ≈ 44MHz

RGB to YPBPR Component-Video Conversion

TYPICAL APPLICATIO

Consumer products require generation of YPBPR lumi-

nance/chrominance component signals, often from RGB

source content. The YPBPR format has a luminance signal

and two weighted color difference signals at baseband.

Even with their fixed internal gain resistors, two LT6550s

connected as shown easily implement the required con-

version matrix equations. The Y channel is a weighted

average of the 2X amplified RGB signals and with the

feedback connection of the Y channel output in the second

LT6550 back to the gain-resistor common pin, an implicit

Y subtraction is performed for the chroma channels and

the desired unity gain is produced for the Y-channel. The

necessary scaling of the color-difference signals is per-

formed passively by their respective output termination

resistor networks. Since this circuit naturally produces

bipolar chroma signals (

±0.35V at the cable load) regard-

less of RGB offset, the simplest implementation is to

power the circuit with

±3.3V split supplies. With an avail-

able output swing of about 5.6V for this supply configura-

tion, the circuit handles video with composite syncs and/

or various offsets without difficulty.

LT6550 Datasheet(PDF) 14 Page - Linear Technology

LT6550 Datasheet(HTML) 14 Page - Linear Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Datasheet Download

Link URL