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SGM8054 Datasheet(PDF) 11 Page - SG Micro Corp

Part # SGM8054
Description  250MHz, Rail-to-Rail Output
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Manufacturer  SGMICRO [SG Micro Corp]
Direct Link  http://www.sg-micro.com
Logo SGMICRO - SG Micro Corp

SGM8054 Datasheet(HTML) 11 Page - SG Micro Corp

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250MHz, Rail-to-Rail Output
CMOS Operational Amplifiers
11
SG Micro Corp
www.sg-micro.com
SGM8051/2/3/4/5
TYPICAL APPLICATION CIRCUITS
Differential Amplifier
The circuit shown in Figure 3 performs the difference function.
If the resistors ratios are equal (R4/R3 = R2/R1), then
VOUT = (Vp - Vn) × R2/R1 + VREF.
Vn
Vp
VOUT
SGM8051
VREF
R1
R2
R3
R4
Figure 3. Differential Amplifier
Low Pass Active Filter
The low pass filter shown in Figure 4 has a DC gain of (-R2/R1)
and the -3dB corner frequency is 1/2
R2C. Make sure the filter
bandwidth is within the bandwidth of the amplifier. The large
values of feedback resistors can couple with parasitic
capacitance and cause undesired effects such as ringing or
oscillation in high-speed amplifiers. Keep resistor values as low
as possible and consistent with output loading consideration.
VIN
VOUT
SGM8051
R1
R2
R3 = R1//R2
C
Figure 4. Low Pass Active Filter
Driving Video
The SGM805x can be used in video applications like in Figure 5.
VIN
SGM8051
RG
RF
75Ω
75Ω
CABLE
VOUT
75Ω
G = 1 + RF / RG
Figure 5. Typical Video Driving


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