GB4550 Datasheet, PDF (1/5 Pages) Gennum Corporation – Monolithic Video Buffer/Clamp

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.
• 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
V_CC
COMP
V_CL
C_X
V_EE
-IN
OUT
GB4550A
+IN
V_CC
NC
V_CL
C_X
V_EE
-IN
OUT
Function
non-inverting input
positive power supply
frequency compensation or NC
clamp voltage input
external capacitor
negative power supply
inverting input
output
C_X
(NC on
GB4550A)
COMP
+IN
-IN
V_CC
100k
+
-
(+2 V OUTPUT CLAMP)
30k
V_CL
+
10pF
-
30k
7mA
Nominal
OUT
V_EE
ORDERING INFORMATION
All resistors in ohms, all capacitors in microfarads unless otherwise stated
Part Number
GB4550 - CSA
GB4550ACSA
Package Type
8 pin SIP
8 pin SIP
Temperature Range
0 to 70^oC
0 to 70^oC
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. [phone] fax: [phone]
Japan Branch: A-302, Miyamae Village, 2-10-42 Miyamae, Suginami-ku, Tokyo 168, Japan tel. [phone] fax: [phone]