ZXFV4089N8TC

ZXFV4089
Issue 4 - December 2008 10 www.zetex.com
© Diodes Incorporated 2008 www.diodes.com
Attention is drawn to the footnote of the DC electrical characteristics table, regarding input signal
amplitude. The video signal is ac coupled into the main amplifier and clamped to V
REF
. As a result
of this the actual voltage seen by the device input at pin 2 is the sum of V
REF
plus the video input
signal voltage excursion above V
REF
(when clamping the back porch, this excursion is normally
the luminance waveform of up to about 0.72V white level). At a particular positive value at pin 2
close to 2.7V, the leakage current of the Sample-hold switch increases causing an increase in the
droop rate. Therefore, for example, a reference voltage of 2V with a peak white video signal of
0.7V could result in increased restoration error arising from the increased DC offset. If pin 2 is
driven above +2.7V peak voltage the DC restoration accuracy could be affected and care should
be taken in this respect. When using 0.7V luminance, this is consistent with the maximum
recommended reference voltage of +2V.
Evaluation circuit
An evaluation circuit is available to allow demonstration of the video black-level clamping
function. The circuit uses the Zetex ZXFV4583 sync separator circuit to provide the HOLD function
timing signal. This circuit is described in the datasheet for ZXFV4583. To order the evaluation
board, ask for ZXFV4583EV.
ZXFV4089
Issue 4 - December 2008 11 www.zetex.com
© Diodes Incorporated 2008 www.diodes.com
Package outline - SO8
Note: Controlling dimensions are in inches. Approximate dimensions are provided in millimeters
DIM Inches Millimeters DIM Inches Millimeters
Min. Max. Min. Max. Min. Max. Min. Max.
A 0.053 0.069 1.35 1.75 e 0.050 BSC 1.27 BSC
A1 0.004 0.010 0.10 0.25 b 0.013 0.020 0.33 0.51
D 0.189 0.197 4.80 5.00 c 0.008 0.010 0.19 0.25
H 0.228 0.244 5.80 6.20
E 0.150 0.157 3.80 4.00 h 0.010 0.020 0.25 0.50
L 0.016 0.050 0.40 1.27 - - - - -
ZXFV4089
Issue 4 - December 2008 12 www.zetex.com
© Diodes Incorporated 2008 www.diodes.com
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Definitions
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Diodes Incorporated reserves the right to alter, without notice, specifications, design, price or conditions of supply of any product or
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Applications disclaimer
The circuits in this design/application note are offered as design ideas. It is the responsibility of the user to ensure that the circuit is fit for
the user’s application and meets with the user’s requirements. No representation or warranty is given and no liability whatsoever is
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Diodes Zetex products are specifically not authorized for use as critical components in life support devices or systems without the express
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1. are intended to implant into the body
or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the
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Diodes Inc.
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ESD (Electrostatic discharge)
Semiconductor devices are susceptible to damage by ESD. Suitable precautions should be taken when handling and transporting devices.
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of damage can vary from immediate functional or parametric malfunction to degradation of function or performance in use over time.
Devices suspected of being affected should be replaced.
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Product status key:
“Preview” Future device intended for production at some point. Samples may be available
“Active” Product status recommended for new designs
“Last time buy (LTB)” Device will be discontinued and last time buy period and delivery is in effect
“Not recommended for new designs”
Device is still in production to support existing designs and production
“Obsolete” Production has been discontinued
Datasheet status key:
“Draft version” This term denotes a very early datasheet version and contains highly provisional information, which
may change in any manner without notice.
“Provisional version” This term denotes a pre-release datasheet. It provides a clear indication of anticipated performance.
However, changes to the test conditions and specifications may occur, at any time and without notice.
“Issue” This term denotes an issued datasheet containing finalized specifications. However, changes to
specifications may occur, at any time and without notice.

ZXFV4089N8TC

Mfr. #:
Manufacturer:
Description:
IC AMP DC RESTORATION 8SOP
Lifecycle:
New from this manufacturer.
Delivery:
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