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What is GB4550?

This electronic component, produced by the manufacturer "Gennum", performs the same function as "Monolithic Video Buffer/Clamp".


GB4550 Datasheet PDF - Gennum

Part Number GB4550
Description Monolithic Video Buffer/Clamp
Manufacturers Gennum　
Logo Gennum Logo　


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GB4550 & GB4550A
Monolithic Video Buffer/Clamp
DATA SHEET
FEATURES
• adjustable clamp level from -5.5 V to +5.5 V at ±10 V
supplies.
• ultra low differential gain (0.02% typ.) and
differential phase (0.03° typ.)
• wideband unity gain: GB4550 ±0.2 dB at 25 MHz
GB4550A ±0.1 dB at 25 MHz
• both drive 150pF loads at full power, flat to 10 MHz.
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• GB4550A — tight delay spread of ±0.15°at colorburst.
• convenient 8 pin SIP packaging.
• both can be configured as a gain stage with reduced
bandwidth.
PIN CONNECTIONS
GB4550 and GB4550A
1 2 3 4 5 67 8
DESCRIPTION
The GB4550 and GB4550A are high performance mono-
lithic video buffer/clamps made on Gennum's LSI process.
They feature a wideband differential amplifier that can be
configured as a gain stage. The output signal voltage is
limited to +2V above the clamp level in order to prevent
damage to crosspoints connected to the output.
The clamping level can be set for normal sync tip clamping
by connecting pin 4 to -0.286 volts. For other applications,
the clamping voltage level can be varied from -5.5 to +5.5
volts.
The GB4550A features a tight delay spread of only ±0.15
degrees while the GB4550 maintains a ± 1.5 degree delay
spread. Both devices operate from ± 9 to ±12 V power
supplies and will directly interface with Gennum's video
crosspoint switches.
The 8 pin SIP package is ideally suited for space restricted
board layouts.
APPLICATIONS
• Input buffering and clamping to crosspoint switches
• Inter - system video signal clamping
Pin No.
1
2
3
4
5
6
7
8
GB4550
+IN
VCC
COMP
VCL
CX
VEE
-IN
OUT
GB4550A
+IN
VCC
NC
VCL
CX
VEE
-IN
OUT
ORDERING INFORMATION
Function
non-inverting input
positive power supply
frequency compensation or NC
clamp voltage input
external capacitor
negative power supply
inverting input
output
CX
(NC on
GB4550A)
COMP
+IN
-IN
VCC
100k
+
-
(+2 V OUTPUT CLAMP)
30k
+
10pF
-
30k
7mA
Nominal
VEE
All resistors in ohms, all capacitors in microfarads unless otherwise stated
VCL
OUT
Part Number
GB4550 - CSA
GB4550ACSA
Package Type
8 pin SIP
8 pin SIP
Temperature Range
0 to 70oC
0 to 70oC
SIMPLIFIED CIRCUIT DIAGRAM
Revision Date: February 1994
Document No. 520 - 34 - 4
GENNUM CORPORATION P.O. Box 489, Stn A, Burlington, Ontario, Canada L7R 3Y3 tel. (905) 632-2996 fax: (905) 632-5946
Japan Branch: A-302, Miyamae Village, 2-10-42 Miyamae, Suginami-ku, Tokyo 168, Japan tel. (03) 3334-7700 fax: (03) 3247-8839

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GB4550 equivalent
0.5
0.4
0.3
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
www.DataSheet4U.co-m0.5
11
TYPICAL PERFORMANCE CURVES
Unless otherwise shown SV = ±10V
CL = 180 pF
150 pF
120 pF
82 pF
10
FREQUENCY (MHz)
4400
Fig. 4 GB4550 Frequency Response
-3
------45678911111111111111111111111111111111111112222222222222222222222222222222222222333333333333333333333333333333333333344444444444444444444444444444444444445555555555555555555555555555555555555666666666666666666666666666666666666677777777777777777777777777777777777778888888888888888888888888888888888888999999999999999999999999999999999999900000000000000000000000000000000000001111111111111111111111111111111111111222222222222222222222222222222222222233333333333333333333333333333333333334444444444444444444444444444444444444555555555555555555555555555555555555566666666666666666666666666666666666667777777777777777777777777777777777777888888888888888888888888888888888888899999999999999999999999999999999999990000000000000000000000000000000000000111111111111111111111111111111111111122222222222222222222222222222222222223333333333333333333333333333333333333444444444444444444444444444444444444455555555555555555555555555555555555556666666666666666666666666666666666666dd7777777777777777777777777777777777777g8888888888888888888888888888888888888pC9999999999999999999999999999999999999L00000000000000000000000000000000000001111111111111111111111111111111111111=22222222222222222222222222222222222221111111111111111111111111111111111111102222222222222222222222222222222222222033333333333333333333333333333333333334444444444444444444444444444444444444p5555555555555555555555555555555555555F66666666666666666666666666666666666667777777777777777777777777777777777777888888888888888888888888888888888888899999999999999999999999999999999999990000000000000000000000000000000000000111111111111111111111111111111111111122222222222222222222222222222222222223333333333333333333333333333333333333
-10 2
2
3 45
FREQUENCY (MHz)
Fig. 5 GB4550 Phase Delay Spread
6
6
0.5
0.3
0.1
0
-0.1
-0.3
CL = 180 pF
CL = 100 pF
CL = 82 pF
-0.5
1
1
10
FREQUENCY (MHz)
40
40
Fig. 6 GB4550A Frequency Response
-3
-1------4567890211112 22221113333222444411133322244411133311122244422233333344411144411122255522233311133344422244411113331111222244422223333311113333444411122224444222333311113334444C1112222444L22233335551113334444=1112224441222333555011133344401111222444p1112222333F2223333111333444441112224441112223332223331111333444222244411133331112224441112223332223334443334445
FREQUENCY (MHz)
Fig. 7 GB4550A Phase Delay Spread
66
0.05
0.03
0.01
0
-0.01
dg
dp
-0.03
VIN = 40 IRE
-0.05
11
35
FREQUENCY (MHz)
Fig. 8 Differential Gain and Phase
1100
REVISION NOTE: Detailed Description added
DOCUMENT
IDENTIFICATION
PRODUCT PROPOSAL
This data has been compiled for market investigation purposes
only, and does not constitute an offer for sale.
ADVANCE INFORMATION NOTE
This product is in development phase and specifications are
subject to change without notice. Gennum reserves the right to
remove the product at any time. Listing the product does not
constitute an offer for sale.
PRELIMINARY DATA SHEET
The product is in a preproduction phase and specifications are
subject to change without notice.
DATA SHEET
The product is in production. Gennum reserves the right to make
changes at any time to improve reliability, function or design, in
order to provide the best product possible.
Gennum Corporation assumes no responsibility for the use of any circuits described herein and makes no representations that they are free from patent infringement.
© Copyright April 1991 Gennum Corporation. All rights reserved. Printed in Canada.
5 520 - 34 - 4


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