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ZXFV4089N8TA

P1-P3P4-P6P7-P9P10-P12
Issue 4 - December 2008 1 www.zetex.com
© Diodes Incorporated 2008 www.diodes.com
A Product Line of
Diodes Incorporated
ZXFV4089
Video amplifier with DC restoration
Description
Ordering information
The ZXFV4089 is a DC restored video
amplifier (black-level clamp) in an 8 pin SOIC
package. It integrates a high performance
video amplifier with a nulling sample and
hold amplifier specially designed to provide
brightness level stability.
The input video signal is AC coupled to the
main amplifier and this AC coupling capacitor
also acts as the holding capacitor for the
sample and hold amplifier. This configuration
reduces both pin count and external
components over traditional solutions.
Typically, during the back-porch interval of an
analog video waveform the sample and hold
amplifier forces the input of the video
amplifier to the reference voltage.
The video waveform is now referenced to the
new reference voltage for the remainder of the
line-scan interval.
The video amplifier has been optimised for
video applications and as such drives back-
terminated 75⍀ loads with good differential
gain and phase errors. The current feedback
architecture allows the bandwidth to remain
fixed over a wide range of gains, and is set by
two external resistors.
The ZXFV4089 is specified for operation at ±5V
and over the -40°C to +85°C temperature range
and is pin compatible with the industry standard
EL4089.
Features
• Complete analog video DC level
restoration system
• Supports various TV systems
• PAL, NTSC, SECAM
• Excellent video performance
• 0.08% differential gain
• 0.1° differential phase
• 30 MHz 0.1 dB bandwidth
• 210 MHz -3 dB bandwidth
• 400V/ms slewrate
• TTL/CMOS logic compatible HOLD input
• Pin and function compatible with industry
standard EL4089
Applications
• Black level clamp, providing stable intensity
in video systems such as:
• cameras
• image capture
• video mixing
•displays
• DC restoration of other high frequency
signals
Figure 1 Pin connection diagram
Part number Reel size
(inches)
Quantity
per reel
Device
marking
ZXFV4089N8TA 7 500 4089
ZXFV4089N8TC 13 2500 4089
ZXFV4089
Issue 4 - December 2008 2 www.zetex.com
© Diodes Incorporated 2008 www.diodes.com
Absolute maximum ratings
- Over operating free-air temperature (unless otherwise stated)
(b)
NOTES:
(b) Stresses above those listed under absolute maximum ratings may cause permanent damage to the device. This is a
stress rating only; functional operation of the device at these or any other conditions above those indicated in the
operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended
periods may affect device reliability.
(c) At high closed loop gains and low gain setting resistors care must be taken if large input signals are applied to the
device which cause the output stage to saturate for extended periods of time.
(d) The power dissipation of the device when loaded must be designed to keep the device junction temperature below
T
JMAX
, de-rated according to the Theta-ja for the SO8 package, which is typically 168°C/W, i.e. 0.74W at 25°C.
ESD: This device is sensitive to static discharge and proper handling precautions are required.
Recommended operating conditions
Recommended resistor values
V
S±
= 5V, C
L
= 10pF
Positive supply voltage V
CC
to GND -0.5V to +5.5V
Negative supply voltage V
EE
to GND -5.5V to +0.5V
Input voltage, pins 1,2,3 to GND V
EE
-0.5V to V
CC
+0.5V
Differential input voltage 2, pin 1 to pin 2 ±3 V
Output current, pin 7 (continuous, TJ < 110°C) ±60 mA
Internal power dissipation
See note
(d)
Input current, IN- pin 1 ±5 mA
Current into IN+ and HOLD, pins 2 and 4 ±5 mA
Operating ambient temperature range -40°C to 85°C
Storage temperature range -65°C to 150°C
Operating junction temperature T
JMAX
150°C
Parameter Min. Max. Unit
V
S±
Dual supply voltage range ±4.75 ±5.25 V
V
CMR
Common mode input voltage range -3 +3 V
T
A
Ambient temperature range -40 85 °C
V
REFCMR
Common mode input range of V
REF
-2 +2 V
R
DRIVE
Effective resistance driving pin 2 30 150 ⍀
G
CL
R
F
R
G
Peaking
680
n/c
2 dB
1820 0
1000 -2dB
430 430 2dB
2470 470 1.5dB
560 560 0
ZXFV4089
Issue 4 - December 2008 3 www.zetex.com
© Diodes Incorporated 2008 www.diodes.com
Electrical characteristics
V
CC
= 5V, V
EE
= -5V, G =1, R
F
= 1kV, R
LOAD
= 1kV, T
amb
= 25°C unless otherwise stated.
Parameter Conditions Min. Typ. Max. Unit
I
CCH
Positive supply current, holding HOLD = HIGH 5 8 10 mA
I
CCS
Positive supply current, sampling HOLD = LOW 5 8.5 11 mA
I
EEH
Negative supply current, holding HOLD = HIGH 5 8 10 mA
I
EES
Negative supply current, sampling HOLD = LOW 5 8.5 11 mA
Amplifier section, hold Input = high unless otherwise stated
V
OS
Input offset voltage V
IN+
= 0V 1 10 mV
I
B+
+ input bias current 1 5 µA
I
B-
– input bias current 1 10 µA
R
OL
Trans-impedance V
IN+
= ±3V 1800 k⍀
R
IN+
+ input resistance 1 2 M⍀
V
O
Output voltage swing V
IN+
= ±3V,
I
OUT
= 740mA
±2.95 ±3.0 V
I
O
Output drive current 40 mA
+PSRR Positive power supply rejection ratio V
CC
= 5V±5%,
V
EE
= -5V
49 57 dB
-PSRR Negative power supply rejection
ratio
V
CC
= 5V,
V
EE
= -5V ±5%
51 58 dB
C
MRR
Common mode rejection ratio V
IN
= ±3V 48 57 dB
Restore section, HOLD = low unless otherwise stated
V
OSCOMP
Composite input offset voltage, from
V
REF
to amplifier output
V
REF
= 0V 0.3 7 mV
I
REF
V
REF
input bias current V
REF
= 0V 3 12 µA
I
O-IN+
Input restore current available, pin 2 180 300 600 µA
CMRR Common mode rejection ratio V
REF
= ±2V 54 90 dB
+PSRR Positive power supply rejection ratio V
CC
= 5V±5%,
V
EE
= -5V
50 60 dB
-PSRR Negative power supply rejection
ratio
V
CC
= 5V,
V
EE
= -5V ±5%
50 60 dB
V
Hmin
HOLD pin high logic level 2 V
V
Lmax
HOLD pin low logic level 0.8 V
I
IL
Logic low input current HOLD = LOW 40 100 µA
I
IH
Logic high input current HOLD = HIGH 12 µA
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ZXFV4089N8TA

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IC AMP DC RESTORATION 8SOP
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