參數(shù)資料
型號(hào): LT1398CS
廠商: LINEAR TECHNOLOGY CORP
元件分類: 運(yùn)動(dòng)控制電子
英文描述: Low Cost Dual and Triple 300MHz Current Feedback Amplifiers with Shutdown
中文描述: DUAL OP-AMP, 12000 uV OFFSET-MAX, 300 MHz BAND WIDTH, PDSO16
封裝: 0.150 INCH, PLASTIC, SO-16
文件頁(yè)數(shù): 12/16頁(yè)
文件大小: 229K
代理商: LT1398CS
12
LT1398/LT1399/LT1399HV
U
S
A
O
PPLICATI
U
U
Buffered RGB to Color-Difference Matrix
Two LT1398s can be used to create buffered color-
difference signals from RGB inputs (Figure 8). In this
application, the R input arrives via 75
coax. It is routed
to the noninverting input of LT1398 amplifier A1 and to
a 1082
resistor R8. There is also an 80.6
termination
+
A2
1/2 LT1398
+
B1
1/2 LT1398
+
A1
1/2 LT1398
R7
324
R6
162
R5
324
R10
2940
R9
549
R11
80.6
R
G
B
R12
86.6
R13
76.8
ALL RESISTORS 1%
V
S
=
±
5V
R8
1082
75
SOURCES
R1
324
R2
324
R4
324
R3
324
B-Y
Y
R-Y
1398/99 F08
+
B2
1/2 LT1398
resistor R11, which yields a 75
input impedance at the
R input when considered in parallel with R8. R8 connects
to the inverting input of a second LT1398 amplifier (A2),
which also sums the weighted G and B inputs to create a
–0.5 Y output. LT1398 amplifier B1 then takes the
–0.5 Y output and amplifies it by a gain of –2, resulting
in the Y output. Amplifier A1 is configured in a noninvert-
ing gain of 2 with the bottom of the gain resistor R2 tied
to the Y output. The output of amplifier A1 thus results in
the color-difference output R-Y.
The B input is similar to the R input. It arrives via 75
coax, and is routed to the noninverting input of LT1398
amplifier B2, and to a 2940
resistor R10. There is also
a 76.8
termination resistor R13, which yields a 75
input impedance when considered in parallel with R10.
R10 also connects to the inverting input of amplifier A2,
adding the B contribution to the Y signal as discussed
above. Amplifier B2 is configured in a noninverting gain
of 2 configuration with the bottom of the gain resistor R4
tied to the Y output. The output of amplifier B2 thus
results in the color-difference output B-Y.
Figure 7. LT1399HV Output Voltage Swing
V
IN
V
OUT
V
S
=
±
7.5V
R
F
= 324
R
G
= 162
R
S
= 16.9
C
L
= 330pF
50ns/DIV
1398/99 F07
Figure 8. Buffered RGB to Color-Difference Matrix
相關(guān)PDF資料
PDF描述
LT1399HV Low Cost Dual and Triple 300MHz Current Feedback Amplifiers with Shutdown
LT1399HVCS Low Cost Dual and Triple 300MHz Current Feedback Amplifiers with Shutdown
LT1399CGN Low Cost Dual and Triple 300MHz Current Feedback Amplifiers with Shutdown
LT1399CS Octal D-Type Edge-Triggered Flip-Flops With 3-State Outputs 20-PDIP 0 to 70
LT1398 Low Cost Dual 300MHz Current Feedback Amplifiers with Shutdown(低價(jià)雙路300MHz電流反饋放大器(帶關(guān)端引腳))
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