GT4123 Datasheet, PDF (1/7 Pages) Gennum Corporation – Two Channel Video Multipliers

GT4123, GT4123A
Two Channel Video Multipliers
DATA SHEET
FEATURES
• two-quadrant video multiplication
• 20 MHz 0.1 dB video & control channel bandwidth
• one external frequency compensation adjustment
• ultra low differential gain & differential phase
• convenient 8 pin package
APPLICATIONS
• Multimedia Graphics Overlay
• Production switchers
• Linear Keyers
PIN CONNECTIONS
TOP VIEW
OUTPUT
PIN 1
8
FREQ. COMP
CONTROL
GROUND
4
5
V_cc
VIDEO IN B
VEE
VIDEO IN A
8 PIN DIP
ORDERING INFORMATION
Part Number
GT4123 - CDA
GT4123 - CKA
GT4123ACDA
GT4123ACKA
Package Type
8 pin PDIP
8 pin SOIC
8 pin PDIP
8 pin SOIC
Temperature Range
0^o to 70^o C
0^o to 70^o C
0^o to 70^o C
0^o to 70^o C
DESCRIPTION
The GT4123 and GT4123A are monolithic dual-channel
video multipliers for use in a wide range of applications
including broadcast and multimedia.
Featuring two wideband video inputs and a single control
input, they achieve high quality video mixing of the two
video input signals to a single output by implementing the
function:
V_O = [ ( V_C • V_A) + (1 - V_C) • V_B ]
where V_C is the control input voltage, which may be varied
continuously over the range 0 to 1V with respect to the
ground pin, and V_A and V_B are the video input signals.
The GT4123 operates with typical power supply voltages
of ±10 volts and draws 15 mA of current. The GT4123A
typically operates from +12 and -5 volt supplies. Both are
available in 8 pin PDIP and 8 pin SOIC.
An Application Note entitled "Using the GT4123 and GT4123A
Video MIxer ICs" (Document No. 520 - 61) is available from
Gennum Corporation.
VIDEO IN A
VIDEO IN B
CONTROL
MULTIPLIER
CORE
FREQ
COMP
OUTPUT
V_REF (0.5V)
(INTERNAL)
FUNCTIONAL BLOCK DIAGRAM
CAUTION
ELECTROSTATIC
SENSITIVE DEVICES
DO NOT OPEN PACKAGES OR HANDLE
EXCEPT AT A STATIC-FREE WORKSTATION
Revision Date: January 1994.
Document No. 520 - 38 - 3
GENNUM CORPORATION P.O. Box 489, Stn A, Burlington, Ontario, Canada L7R 3Y3 tel. [phone] fax: [phone]
Japan Branch: A-302, M i yamae Vi l l age, 2–10–42 M i yamae, Suginami–ku Tokyo 168, Japan tel. [phone] fax [phone]