A Product Line of
Diodes Incorporated
ZXFV4089
Video amplifier with DC restoration
Description
The ZXFV4089 is a DC restored video The video waveform is now referenced to the
amplifier (black-level clamp) in an 8 pin SOIC new reference voltage for the remainder of the
package. It integrates a high performance line-scan interval.
video amplifier with a nulling sample and
hold amplifier specially designed to provide
brightness level stability.
The video amplifier has been optimised for
video applications and as such drives back-
terminated 75⍀ loads with good differential
The input video signal is AC coupled to the gain and phase errors. The current feedback
main amplifier and this AC coupling capacitor architecture allows the bandwidth to remain
also acts as the holding capacitor for the fixed over a wide range of gains, and is set by
sample and hold amplifier. This configuration two external resistors.
reduces both pin count and external
components over traditional solutions.
The ZXFV4089 is specified for operation at 5V
and over the -40°C to +85°C temperature range
Typically, during the back-porch interval of an and is pin compatible with the industry standard
analog video waveform the sample and hold EL4089.
amplifier forces the input of the video
amplifier to the reference voltage.
Features
Applications
•
Complete analog video DC level
restoration system
Supports various TV systems
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•
Black level clamp, providing stable intensity
in video systems such as:
•
•
•
•
cameras
•
image capture
video mixing
displays
•
•
PAL, NTSC, SECAM
Excellent video performance
•
•
•
0.08% differential gain
0.1° differential phase
30 MHz 0.1 dB bandwidth
DC restoration of other high frequency
signals
•
•
•
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210 MHz -3 dB bandwidth
400V/ms slewrate
TTL/CMOS logic compatible HOLD input
Pin and function compatible with industry
standard EL4089
Figure 1 Pin connection diagram
Ordering information
Part number
Reel size Quantity
(inches) per reel
Device
marking
ZXFV4089N8TA
ZXFV4089N8TC
7
13
500
2500
4089
4089
Issue 4 - December 2008
© Diodes Incorporated 2008
1
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