EL2120C
100 MHz Current Feedback Amplifier
The EL2120C Macromodel
This macromodel has been developed to assist the user in simulating the EL2120C with surrounding
circuitry It was developed for the PSPICE simulator (copywritten by the Microsim corporation) and
may need to be rearranged for other simulators particularly the H operator It approximates frequency
response and small-signal transients as well although the effects of load capacitance does not show
This model is slightly more complicated than the models used for low-frequency op-amps but is much
more accurate for AC
The model does not simulate these characteristics accurately
noise
non-linearities
slew rate limitations
temperature effects
settling time
manufacturing variations
input or output resonances CMRR and PSRR
Revision A March 1992
Enhancements include PSRR CMRR and Slew Rate Limiting
a
input
Connections
b
input
l
a
Vsupply
l
l
b
Vsupply
l
l
l
output
l
l
l
l
l
subckt M2120
Input Stage
e1 10 0 3 0 1 0
vis 10 9 0V
h2 9 12 vxx 1 0
r1 2 11 25
l1 11 12 20nH
iinp 3 0 10mA
iinm 2 0 5mA
r12 3 0 2Meg
Slew Rate Limiting
3
l
2
l
7
l
4
l
6
q1 4 18 19 qp
q2 7 18 20 qn
q3 7 19 21 qn
q4 4 20 22 qp
r7 21 6 4
r8 22 6 4
ios1 7 19 2 5mA
ios2 20 4 2 5mA
Supply
ips 7 4 10mA
h1 13 0 vis 600
r2 13 14 1K
d1 14 0 dclamp
s2 0 14 dclamp
High Frequency Pole
e2 30 0 14 0 0 00166666666
15 30 17 1mH
c5 17 0 0 5pF
r5 17 0 600
Transimpedance Stage
g1 0 18 17 0 1 0
rol 18 0 140K
cdp 18 0 7 9pF
Output Stage
Error Terms
ivos 0 23 5mA
vxx 23 0 0V
e4 24 0 6 0 1 0
e5 25 0 7 0 1 0
e6 26 0 4 0 1 0
r9 24 23 562
r10 25 23 10K
r11 26 23 10K
Models
model qn npn (is
e
5e
b
15 bf
e
500 tf
e
0 1nS)
model qp pnp (is
e
5e
b
15 bf
e
500 tf
e
0 1nS)
model dclamp d(is
e
1e
b
30 ibv
e
0 02 bv
e
4 n
e
4)
ends
11
TD is 3 8in
TAB WIDE
T
ELANTEC [ ELANTEC SEMICONDUCTOR ]
