EL2082C
Current-Mode Multiplier
Features
# Flexible inputs and outputs, all
ground referred
General Description
The EL2082 is a general purpose variable gain control building
block, built using an advanced proprietary complementary bi-
polar process. It is a two-quandrant multiplier, so that zero or
negative control voltages do not allow signal feedthrough and
very high attenuation is possible. The EL2082 works in current
mode rather than voltage mode, so that the input impedance is
low and the output impedance is high. This allows very wide
bandwidth for both large and small signals.
# 150 MHz large and small-signal
bandwidth
# 46 dB of calibrated gain control
range
# 70 dB isolation in disable mode
10 MHz
@
# 0.15% diff gain and 0.05 diff
§
The I pin replicates the voltage present on the V pin; there-
IN
IN
fore, the V pin can be used to reject common-mode noise and
IN
phase performance at NTSC
using application circuit
establish an input ground reference. The gain control input is
calibrated to 1 mA/mA signal gain for 1V of control voltage.
The disable pin (E) is TTL-compatible, and the output current
can comply with a wide range of output voltages.
g
g
# Operates on 5V to 15V power
supplies
# Outputs may be paralleled to
function as a multiplexer
Because current signals rather than voltages are employed, mul-
tiple inputs can be summed and many outputs wire-or’ed or
mixed.
Applications
# Level adjust for video signals
# Video faders and mixers
# Signal routing multiplexers
# Variable active filters
# Video monitor contrast control
# AGC
The EL2082 operates from a wide range of supplies and is avail-
able in standard 8-pin plastic DIP or 8-lead SO.
Connection Diagram
# Receiver IF gain control
# Modulation/demodulation
8-Pin DIP/SO
# General ‘‘cold’’ front-panel
control of AC signals
Ordering Information
Ý
Outline
Part No.
Temp. Range
Package
8-Pin P-DIP MDP0031
8-Pin SO MDP0027
a
EL2082CN 0 C to 75 C
§
§
2082–1
a
EL2082CS 0 C to 75 C
§
§
Top View
Note: All information contained in this data sheet has been carefully checked and is believed to be accurate as of the date of publication; however, this data sheet cannot be a ‘‘controlled document’’. Current revisions, if any, to these
specifications are maintained at the factory and are available upon your request. We recommend checking the revision level before finalization of your design documentation.
©
1992 Elantec, Inc.
ELANTEC [ ELANTEC SEMICONDUCTOR ]
