Current-Mode Multiplier - Elantec
Description
EL2082C
EL2082C
Current-Mode Multiplier
Features
Flexible inputs and outputs all ground referred
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 phase performance at NTSC using application circuit
Operates on g5V to g15V power supplies
Outputs may be paralleled to function as a multiplexer
Applications
Level adjust for video signals Video faders and mixers Signal routing multiplexers Variable active filters Video monitor contrast control AGC Receiver IF gain control Modulation demodulation General ‘‘cold’’ front-panel
control of AC signals
Ordering Information
Part No Temp Range Package Outline
EL2082CN 0 C to a75 C 8-Pin P-DIP MDP0031
EL2082CS 0 C to a75 C 8-Pin SO
MDP0027
General Description
The EL2082 is a general purpose variable gain control building block built using an advanced proprietary complementary bipolar 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
The IIN pin replicates the voltage present on the VIN pin therefore the VIN pin can be used to reject common-mode noise and 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
Because current signals rather than voltages are employed multiple inputs can be summed and many outputs wire-or’ed or mixed
The EL2082 operates from a wide range of supplies and is available in standard 8-pin plastic DIP or 8-lead SO
Connection Diagram
8-Pin DIP SO
Top View
2082 – 1
January 1996 Rev D
Note All information ...
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