EL4093 데이터 시트보기 (PDF) - Intersil
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EL4093 Datasheet PDF : 12 Pages
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Typical Performance Curves (Continued)
EL4093
Differential Gain and
Phase vs DC Input
Voltage at 3.58MHz
Differential Gain and
Phase vs DC Input
Voltage at 3.58MHz
Slew Rate vs Die
Temperature (Video Amp)
Small-Signal Step Response
Large-Signal Step Response
Settling Time vs
Settling Accuracy
(Video Amp)
Maximum Power Dissipation
vs Ambient Temperature,
16-Pin PDIP Package
Maximum Power Dissipation
vs Ambient Temperature,
16-Pin SO Package
Applications Information
Product Description
The EL4093 is a high speed DC-restore system containing a
current feedback amplifier (CFA) and a sample & hold (S/H)
amplifier. The CFA offers a wide 3dB bandwidth of 300MHz
and a slew rate of 1500V/µs, making it ideal for high speed
video applications such as SVGA. The CFA’s excellent
differential gain and phase at 3.58MHz also makes it suitable
for NTSC applications. Drawing only 9.5mA on ±5V supplies,
the EL4093 serves as an excellent choice for those
applications requiring both low power and high bandwidth.
7
The connection between the CFA and sample & hold (the
Autozero interface) has been greatly simplified. The output
of the sample & hold is a high impedance current source,
allowing direct connection to the CFA inverting input for
autozero purposes. In addition, special circuitry within the
sample & hold provides a charge current of 8.5mA in sample
mode, resulting in a sample hold current ratio (ratio of
charging current to droop current) of approx. 1,000,000.
Theory of Operation
In video applications, DC restoration moves the backporch or
black level to a fixed DC reference. The EL4093 uses a CFA
in feedback with a sample & hold to provide DC restoration.
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