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GB4570-CTA Datasheet

  • GB4570-CTA

  • Monolithic Video Buffer/Clamp

  • 5頁

  • ETC

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GB4570 Monolithic
Video Buffer/Clamp
DATA SHEET
FEATURES
鈥?/div>
accurate sync tip clamping (
鹵
2 mV typical)
鈥?/div>
less than 1 mV clamping distortion
鈥?/div>
variable clamping voltage (V
EE
+ 3 V to V
CC
-4.5 V)
鈥?/div>
ultra low differential gain and differential phase
鈥?/div>
less than
鹵
0.15
擄
phase delay variation at 3.58 MHz
鈥?/div>
鹵
0.1 dB flatness to 80 MHz
鈥?/div>
鹵
4.5 to
鹵
13.2 V supply voltage range
DESCRIPTION
The GB4570 is a high performance video buffer/clamp used
primarily for sync tip clamping of video signals. Key features
include operation from
鹵
4.5 to
鹵
13.2 V supply voltages,
鹵
0.1
dB flatness to 80 MHz and availability of industry standard DIP
and SOIC packages.
In a typical video application, the GB4570 clamps the sync tip
to a known voltage. The clamping level can be set for normal
sync tip clamping by connecting pin 3 to - 0.286 volts. For
applications requiring non-standard sync tip clamping, the
clamping voltage applied to pin 3 may be varied.
The GB4570 features a tight delay spread of only
鹵
0.15擄 at
color burst frequencies and less than
鹵
1 millivolts clamping
distortion.
PIN CONNECTIONS
GB4570
GND
V
IN
V
CLAMP
C
HOLD
1
2
3
4
8
7
6
5
V
CC
V
OUT
V
EE
NC
APPLICATIONS
鈥?/div>
鈥?/div>
鈥?/div>
Sync tip clamping of NTSC, PAL, SECAM and RGB
Video Signals
Input buffering and clamping
Inter-system video signal clamping
SIMPLIFIED CIRCUIT DIAGRAM
V
CC
8
AVAILABLE PACKAGING
8 pin PDIP
8 pin SOIC
V
IN
COUPLING
CAP
2
7 V
OUT
ORDERING INFORMATION
Part Number
Package
Temperature Range
6
-
50k
+
V
EE
GB4570-CDA
GB4570-CKA
GB4570-CTA
8 pin PDIP
8 pin SOIC
0擄 to 70擄C
0擄 to 70擄C
3 V
CLAMP
8 pin SOIC Tape 0擄 to 70擄C
4
C
HOLD
Document No. 521 - 18 - 01
GENNUM CORPORATION P.O. Box 489, Stn A, Burlington, Ontario, Canada L7R 3Y3 tel. (905) 632-2996 fax: (905) 632-2055
Japan Branch: A-302, Miyamae Village, 2-10-42, Miyamae, Suginami-ku, Tokyo 168, Japan
tel. (03) 3247-8838
fax. (03) 3247-8839

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