EL4430C/EL4431C
Video Instrumentation Amplifiers
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Macromodel
This is a Pspice-compatible macromodel of the EL4430 video instrumentation
amplifier assembled as a subcircuit. The pins are numbered sequentially
as the subcircuit interface nodes. T1 is a transmission line which provides
a good emulation of the more complicated real device. This model correctly
displays the characteristics of input clipping, frequency response, CMRR
both AC and DC, output clipping, output sensitivity to capacitive loads,
gain accuracy, slewrate limiting, input bias current and impedance. The
macromodel does not exhibit proper results with respect to supply current,
supply sensitivities, offsets, output current limit, differential gain or
phase, nor temperature.
a
Connections:
IN
b
VIN
l
l
l
l
l
l
l
l
b
V
l
l
l
l
l
l
a
V
l
l
l
l
l
l
VFB
l
l
l
l
l
VREF
l
l
l
VOUT
l
l
GND
l
l
l
l
l
l
.SUBCKT EL4430/EL
***
3
4
2
7
6
5
8
1
*** EL4430 macromodel ***
***
******
i1 7 10 .00103
i2 7 11 .00103
i3 7 12 .00105
i4 7 13 .00105
v1 7 14 3
v2 7 15 3
v3 19 2 3
******
c1 11 1 .03p
c2 12 1 .03p
c3 18 1 2.1p
c4 16 17 0.6p
******
r1 10 11 2000
r2 12 13 2000
r3 10 1 30e6
r4 16 2 1000
r5 17 2 1000
r6 18 1 1.27e6
r7 23 21 20
r8 21 8 100
******
11 21 8 50n
******
d1 11 14 diode
d2 12 14 diode
d3 18 15 diode
d4 19 18 diode
e
.model diode d(tt 120n)
******
q1 16 3 10 1 pnp
q2 17 4 11 1 pnp
q3 16 5 12 1 pnp
q4 17 6 13 1 pnp
e
e
e
.model pnp pnp (bf 90 va 44 tr 50n)
******
g1 18 1 17 16 .0005
e1 20 1 1 18 1.0
e
e
t1 22 1 20 1 z0 50 td 1.5n
r1t1 22 1 50
e2 23 1 22 1 1.0
******
.ENDS
10
ELANTEC [ ELANTEC SEMICONDUCTOR ]
