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參數(shù)資料
| 型號： | LT6559CUD#PBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 4/16頁 |
| 文件大小： | 0K |
| 描述： | IC AMP VIDEO TRPL 16-QFN |
| 標(biāo)準(zhǔn)包裝： | 121 |
| 應(yīng)用： | 通用 |
| 電路數(shù)： | 3 |
| -3db帶寬： | 300MHz |
| 轉(zhuǎn)換速率： | 800 V/µs |
| 電流 - 電源： | 4.6mA |
| 電流 - 輸出 / 通道： | 100mA |
| 電壓 - 電源，單路/雙路(±)： | 4 V ~ 12 V，±2 V ~ 6 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-WFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 16-QFN-EP（3x3） |
| 包裝： | 管件 |
LT6559
12
6559f
TYPICAL APPLICATIONS
YPBPR to RGB Conversion
Two LT6559s can be used to map the YPBPR “component”
video into the RGB color space as shown in Figure 8. The
Y input is properly terminated with 75Ω and buffered with
a gain of 2 by amplier A2. The PR input is terminated
and buffered with a gain of 2.8 by amplier A1. The PB
input is terminated and buffered with a gain of 3.6 by
amplier A3.
Amplier B1 performs an equally weighted addition
of ampliers A1 and A2 outputs, thereby producing
2(Y + 1.4PR), which generates the desired R signal at the
terminated load due to the voltage division by 2 caused by
the termination resistors. Amplier B3 forms the equally
weighted addition of ampliers A2 and A3 outputs, thereby
producing 2(Y + 1.8PB), which generates the desired B
signal at the terminated load.
Amplier B2 performs a weighted summation of all three
inputs. The PB signal is amplied overall by:
=
301
154
36
2 034
.
(
.
)
k
The PR signal is amplied overall by:
=
301
590
28
2 071
.
(
.
)
The Y signal is amplied overall by:
1
698
1
301
590 1 54
22 1
k
kk
+
+=
|| .
( )
Therefore the amplier B2 output is:
2(Y – 0.34PB – 0.71PR)
which generates the desired G signal at the terminated load.
The sync present on the Y input is reconstructed on all
three R, G, and B outputs.
Figure 8. YPBPR to RGB Conversion
R = Y + 1.40PR
G = Y – 0.34PB – 0.71 PR
B = Y + 1.77PB
ALL RESISTORS 1%
VS = ±3V TO ±5V
+
–
A1
1/3 LT6559
75
301
165
PR
+
–
A2
1/3 LT6559
75
301
301
Y
+
–
A3
1/3 LT6559
75
301
118
PB
+
–
B1
1/3 LT6559
1k
301
301
R
75
1k
+
–
B2
1/3 LT6559
+
–
B3
1/3 LT6559
301
301
B
75
1k
301
590
G
75
698
1.54k
6559 F08
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