Current-Mode Multiplier - Intersil
Description
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Current Mode Multiplier
Features
EL2082
FN7152
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 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.
• Flexible inputs and outputs, all ground referred • 150MHz large and small-signal bandwidth • 46dB of calibrated gain control range • 70dB isolation in disable mode @ 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
EL2082 (8-PIN SO, PDIP)
TOP VIEW
• General “cold” front-panel control of AC signals
Ordering Information
PART NUMBER TEMP.
RANGE PACKAGE
PKG.
NO.
EL2082...
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