参数资料
型号: LT1807CS8#PBF
厂商: Linear Technology
文件页数: 15/28页
文件大小: 0K
描述: IC OPAMP PREC R-R I/O DUAL 8SOIC
标准包装: 100
放大器类型: 通用
电路数: 2
输出类型: 满摆幅
转换速率: 140 V/µs
增益带宽积: 325MHz
电流 - 输入偏压: 5µA
电压 - 输入偏移: 100µV
电流 - 电源: 11mA
电流 - 输出 / 通道: 85mA
电压 - 电源,单路/双路(±): 2.5 V ~ 12.6 V,±1.25 V ~ 6.3 V
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
供应商设备封装: 8-SO
包装: 管件
产品目录页面: 1319 (CN2011-ZH PDF)
LT1806/LT1807
22
18067fc
TYPICAL APPLICATIONS
Single Supply Video Line Driver
The LT1806/LT1807 are wideband rail-to-rail op amps with
large output current that allows them to drive video signals
in low supply applications. Figure 4 depicts a single supply
video line driver with AC coupling to minimize the quies-
cent power dissipation. Resistors R1 and R2 are used to
level-shift the input and output to provide the largest signal
swing. The gain of 2 is set up with R3 and R4 to restore
the signal at VOUT, which is attenuated by 6dB due to the
matching of the 75Ω line with the back-terminated resistor,
R5. The back termination will eliminate any reection of
the signal that comes from the load. The input termination
resistor, RT, is optional—it is used only if matching of
the incoming line is necessary. The values of C1, C2 and
C3 are selected to minimize the droop of the luminance
signal. In some less stringent requirements, the value of
capacitors could be reduced. The –3dB bandwidth of the
driver is about 90MHz on 5V supply, and the amount of
peaking will vary upon the value of capacitor C4.
Figure 4. 5V Single Supply Video Line Driver
+
LT1806
VIN
18067 F04
C1
33μF
C2
150μF
RT
75Ω
RLOAD
75Ω
VOUT
R2
5k
R3
1k
R4
1k
C4
3pF
R1
5k
5V
2
3
6
7
4
R5
75Ω
75W
COAX CABLE
C3
1000μF
+
Figure 5. Video Line Driver Frequency Response
FREQUENCY (MHz)
–2
VOLTAGE
GAIN
(dB)
4
5
–3
–4
3
0
2
1
–1
0.2
10
100
18067 F05
–5
1
VS = 5V, 0V
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