REV. A
OP285
–12–
OP285 SPICE Model
* Node assignments
* noninverting input
* inverting input
* positive supply
* negative supply
* output
*
*
.SUBCKT OP285 1 2 99 50 34
*
* INPUT STAGE & POLE AT 100 MHZ
*
R3 5 51 2.188
R4 6 51 2.188
CIN 1 2 1.5E-12
C2 5 6 364E-12
I1 97 4 100E-3
IOS 1 2 1E-9
EOS 9 3 POLY(1) 26 28 35E-6 1
Q1 5 2 7 QX
Q2 6 9 8 QX
R5 7 4 1.672
R6 8 4 1.672
D1 2 36 DZ
D2 1 36 DZ
EN 3 1 100 1
GN1 0 2 13 0 1
GN20 1 16 0 1
*
EREF 98 0 28 0 1
EP 97 0 99 0 l
EM 510 50 0 1
*
* VOLTAGE NOISE SOURCE
*
DN1 35 10 DEN
DN2 10 11 DEN
VN1 35 0 DC 2
VN2 0 11 DC 2
*
* CURRENT NOISE SOURCE
*
DN3 12 13 DIN
DN4 13 14 DIN
VN3 12 0 DC 2
VN4 0 14 DC 2
CN1 13 0 7.53E-3
*
* CURRENT NOISE SOURCE
*
DN5 15 16 DIN
DN6 16 17 DIN
VN5 15 0 DC 2
VN6 0 17 DC2
CN2 16 0 7.53E-3
*
* GAIN STAGE & DOMINANT POLE AT 32 HZ *
R7 18 98 1.09E6
C3 18 98 4.55E-9
G1 98 18 5 6 4.57E-1
V2 97 19 1.4
V3 20 51 1.4
D3 18 19 DX
D4 20 18 DX
*
* POLE/ZERO PAIR AT 1.5MHz/2.7MHz
*
R8 21 98 1E3
R9 21 22 1.25E3
C4 22 98 47.2E-12
G2 98 21 18 28 1E-3
*
* POLE AT 100 MHZ
*
R10 23 98 1
C5 23 98 1.59E-9
G3 98 23 21 28 1
*
* POLE AT 100 MHZ
*
R11 24 98 l
C6 24 98 1.59E-9
G4 98 24 23 28 1
*
* COMMON-MODE GAIN NETWORK WITH ZERO AT
1 kHZ *
R12 25 26 1E6
C7 25 26 1.59E-12
R13 26 98 1
E2 25 98 POLY(2) 1 98 2 98 0 2.506 2.506
*
* POLE AT 100 MHZ
*
R14 27 98 1
C8 27 98 1.59E-9
G5 98 27 24 28 1
*
* OUTPUT STAGE
*
Rl5 28 99 100E3
R16 28 50 100E3
C9 28 50 1 E-6
ISY 99 50 1.85E-3
R17 29 99 100
R18 29 50 100
L2 29 34 1E-9
G6 32 50 27 29 10E-3
G7 33 50 29 27 10E-3
G8 29 99 99 27 10E-3
G9 50 29 27 50 10E-3
V4 30 29 1.3
V5 29 31 3.8
F1 29 0 V4 1
F2 0 29 V5 1
D5 27 30 DX
D6 31 27 DX
D7 99 32 DX
D8 99 33 DX
D9 50 32 DY
D10 50 33 DY
*
* MODELS USED
*
.MODEL QX PNP(BF = 5E5)
.MODEL DX D(IS = lE-12)
.MODEL DY D(IS = lE-15 BV = 50)
.MODEL DZ D(IS = lE-15 BV = 7.0)
.MODEL DEN D(IS = lE-12 RS = 4.35K KF = 1.95E-15
AF = l) .MODEL DIN D(IS = lE-12 RS = 77.3E-6
KF = 3.38E-15 AF = 1) .ENDS OP-285
