el2120 Intersil Corporation, el2120 Datasheet - Page 10

• Manufacturer Part Number: el2120
• Description: 100mhz Current Feedback Amplifier
• Manufacturer: Intersil Corporation

The EL2120 Macromodel
This macromodel has been developed to assist the user in
simulating the EL2120 with surrounding circuitry. It was
developed for the PSPICE simulator (copyrighted 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.
* Revision A. March 1992
* Enhancements include PSRR, CMRR, and Slew Rate Limiting
* Connections:
*
*
*
*
*
.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 10µA
iinm 2 0 5µA
r12 3 0 2Meg
*
* Slew Rate Limiting
*
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 1µH
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
*
q1 4 18 19 qp
q2 7 18 20 qn
q3 7 19 21 qn
3
+input
|
|
|
|
|
2
-input
|
|
|
|
7
+Vsupply
|
|
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10
4
-Vsupply
|
|
6
output
|
EL2120
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