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GB4550A

更新时间： 2024-11-19 07:01:07
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页数 文件大小 规格书
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Monolithic Video Buffer/Clamp

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GB4550A 数据手册

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GB4550 & GB4550A  
Monolithic Video Buffer/Clamp  
DATA SHEET  
FEATURES  
DESCRIPTION  
• adjustable clamp level from -5.5 V to +5.5 V at ±10 V  
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.  
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.  
• GB4550A — tight delay spread of ±0.15°at colorburst.  
• convenient 8 pin SIP packaging.  
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.  
• both can be configured as a gain stage with reduced  
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.  
bandwidth.  
PIN CONNECTIONS  
The 8 pin SIP package is ideally suited for space restricted  
board layouts.  
GB4550 and GB4550A  
APPLICATIONS  
• Input buffering and clamping to crosspoint switches  
• Inter - system video signal clamping  
1
2
3
4
5
6
7
8
CX  
Pin No. GB4550  
GB4550A  
+IN  
Function  
(+2 V OUTPUT CLAMP)  
1
2
3
4
5
6
7
8
+IN  
VCC  
COMP  
VCL  
non-inverting input  
positive power supply  
frequency compensation or NC  
clamp voltage input  
external capacitor  
negative power supply  
inverting input  
100k  
VCC  
NC  
30k  
V
CL  
(NC on  
GB4550A)  
COMP  
+
-
10pF  
VCL  
CX  
CX  
+IN  
-IN  
+
-
VEE  
VEE  
30k  
-IN  
-IN  
OUT  
OUT  
output  
VCC  
OUT  
7mA  
Nominal  
VEE  
All resistors in ohms, all capacitors in microfarads unless otherwise stated  
ORDERING INFORMATION  
Part Number  
GB4550 - CSA  
GB4550ACSA  
Package Type  
8 pin SIP  
Temperature Range  
SIMPLIFIED CIRCUIT DIAGRAM  
o
0 to 70 C  
o
8 pin SIP  
0 to 70 C  
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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