参数资料
型号: LT6551IMS#TRPBF
厂商: Linear Technology
文件页数: 6/16页
文件大小: 0K
描述: IC AMP VIDEO QUAD 3.3V 10-MSOP
标准包装: 2,500
应用: 电压反馈
输出类型: 满摆幅
电路数: 4
-3db带宽: 90MHz
转换速率: 600 V/µs
电流 - 电源: 8.5mA
电流 - 输出 / 通道: 60mA
电压 - 电源,单路/双路(±): 3 V ~ 12.6 V
安装类型: 表面贴装
封装/外壳: 10-TFSOP,10-MSOP(0.118",3.00mm 宽)
供应商设备封装: 10-MSOP
包装: 带卷 (TR)
LT6550/LT6551
14
65501fa
+
450
450
+
450
450
+
450
450
1
R
G
B
PR
Y
PB
2
3
45
9
10
8
7
1070
549
2940
75
75
174
LT6550
261
75
–3.3V
3.3V
+
450
450
+
450
450
+
450
450
1
2
3
45
9
10
8
7
105
75
133
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
U
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.
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