EL2082C
Current-Mode Multiplier
Typical Performance Curves Ð Contd.
8-Pin Plastic DIP
Maximum Power Dissipation
vs Ambient Temperature
8-Lead SO
Maximum Power Dissipation
vs Ambient Temperature
2082–11
2082–12
Applications Information
The EL2082 is best thought of as a current-conveyor with variable current gain. A current input to the
pin, with a gain controlled by V
I pin will be replicated as a current driven out the I
an input of 1 mA will produce an output current of 1 mA for V
. Thus,
GAIN
1V. An input of 1 mA will
IN
OUT
e
range is zero to 2V. A negative level
GAIN
e
, even only 20 mV, will yield very high signal attenuation.
a
produce an output of 2 mA for V
b
2V. The useable V
GAIN
GAIN
on V
GAIN
The EL2082 in Conjunction with Op-Amps
This resistor-load circuit shows a simple method of converting voltage signals to currents and vice
versa:
a
V
R
R
R
G
GAIN
L
F
e
Gain
a
1V
R
95X
R
G
#
J #
J
IN
a
EL2082
Op-Amp
2082–13
g
would typically be 1 kX for video level inputs, or 10 kX for 10V instrumentation signals. The
R
IN
higher the value of R (the lower the input current), the lower the distortion levels of the EL2082 will
IN
be. An approximate expression of the nonlinearity of the EL2082 is:
2
e
Nonlinearity (%)
0.3 I (mA)
* IN
Optimum input current level is a tradeoff between distortion and signal-to-noise-ratio. The distortion
levels; distortion is set by input currents alone.
and input range do not change appreciably with V
GAIN
7
ELANTEC [ ELANTEC SEMICONDUCTOR ]
