• 简体中文
• English

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 I_IN pin replicates the voltage present on the V_IN pin; therefore, the V_IN pin can be used to reject common-mode noise and establish an input ground reference. The gain control input is calibrated to 1mA/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-pin SO.

Key Features

• Flexible inputs and outputs, all ground referred
• 150MHz large and small-signal bandwidth
• 46dB of calibrated gain control range
• 70dB isolation in disable mode at 10MHz
• 0.15% diff gain and 0.05° diff phase performance at NTSC using application circuit
• Operates on ±5V to ±15V 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