参数资料
型号: LT1399CS#TR
厂商: Linear Technology
文件页数: 4/16页
文件大小: 0K
描述: IC AMP CURR FEEDBACK TRPL 16SOIC
标准包装: 2,500
放大器类型: 电流反馈
电路数: 3
转换速率: 800 V/µs
-3db带宽: 300MHz
电流 - 输入偏压: 10µA
电压 - 输入偏移: 1500µV
电流 - 电源: 4.6mA
电流 - 输出 / 通道: 80mA
电压 - 电源,单路/双路(±): 4 V ~ 12 V,±2 V ~ 6 V
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 16-SOIC(0.154",3.90mm 宽)
供应商设备封装: 16-SO
包装: 带卷 (TR)
12
LT1398/LT1399/LT1399HV
sn13989 13989fas
U
S
A
O
PPLICATI
WU
U
I FOR ATIO
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%
VS = ±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
VIN
VOUT
VS = ±7.5V
50ns/DIV
RF = 324
RG = 162
RS = 16.9
CL = 330pF
1398/99 F07
Figure 8. Buffered RGB to Color-Difference Matrix
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LT1399HV 制造商:LINER 制造商全称:Linear Technology 功能描述:Low Cost Dual and Triple 300MHz Current Feedback Amplifiers with Shutdown
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