AD8541/AD8542/AD8544
* AD8542 SPICE Macro-model Typical Values
* 6/98, Ver. 1
* TAM / ADSC
*
* Copyright 1998 by Analog Devices
*
* Refer to “README.DOC” file for License State-
ment. Use of this
* model indicates your acceptance of the terms
and provisions in
* the License Statement.
*
* Node Assignments
*
noninverting input
*
| inverting input
*
| |
positive supply
*
| |
| negative supply
*
| |
| | output
*
| |
| | |
*
| |
| | |
.SUBCKT AD8542
1 2 99 50 45
*
* INPUT STAGE
*
M1
4 1 8 8 PIX L=0.6E-6 W=16E-6
M2
6 7 8 8 PIX L=0.6E-6 W=16E-6
M3 11 1 10 10 NIX L=0.6E-6 W=16E-6
M4 12 7 10 10 NIX L=0.6E-6 W=16E-6
RC1 4 50 20E3
RC2 6 50 20E3
RC3 99 11 20E3
RC4 99 12 20E3
C1
4 6 1.5E-12
C2 11 12 1.5E-12
I1 99 8 1E-5
I2 10 50 1E-5
V1 99 9 0.2
V2 13 50 0.2
D1
8 9 DX
D2 13 10 DX
EOS 7 2 POLY(3) (22,98) (73,98) (81,0) 1E-3 1 1
1
IOS 1 2 2.5E-12
*
* CMRR 64dB, ZERO AT 20kHz
*
ECM1 21 98 POLY(2) (1,98) (2,98) 0 .5 .5
RCM1 21 22 79.6E3
CCM1 21 22 100E-12
RCM2 22 98 50
*
* PSRR=90dB, ZERO AT 200Hz
*
RPS1 70 0 1E6
RPS2 71 0 1E6
CPS1 99 70 1E-5
CPS2 50 71 1E-5
EPSY 98 72 POLY(2) (70,0) (0,71) 0 1 1
RPS3 72 73 1.59E6
CPS3 72 73 500E-12
RPS4 73 98 25
*
* VOLTAGE NOISE REFERENCE OF 35nV/rt(Hz)
*
VN1 80 0 0
RN1 80 0 16.45E-3
HN 81 0 VN1 35
RN2 81 0 1
*
* INTERNAL VOLTAGE REFERENCE
*
VFIX 90 98 DC 1
S1
90 91 (50,99) VSY_SWITCH
VSN1 91 92 DC 0
RSY 92 98 1E3
EREF 98 0 POLY(2) (99,0) (50,0) 0 .5 .5
GSY 99 50 POLY(1) (99,50) 0 3.7E-6
*
* ADAPTIVE GAIN STAGE
* AT Vsy>+4.2, AVol=45 V/mv
* AT Vsy<+3.8, AVol=450 V/mv
*
G1 98 30 POLY(2) (4,6) (11,12) 0 2.5E-5 2.5E-5
VR1 30 31 DC 0
H1 31 98 POLY(2) VR1 VSN1 0 5.45E6 0 0 49.05E9
CF 45 30 10E-12
D3 30 99 DX
D4 50 30 DX
*
* OUTPUT STAGE
*
M5 45 46 99 99 POX L=0.6E-6 W=375E-6
M6 45 47 50 50 NOX L=0.6E-6 W=500E-6
EG1 99 46 POLY(1) (98,30) 1.05 1
EG2 47 50 POLY(1) (30,98) 1.04 1
*
* MODELS
*
.MODEL POX PMOS (LEVEL=2,KP=20E-6,VTO=-
+1,LAMBDA=0.067)
.MODEL NOX NMOS (LEVEL=2,KP=20E-
+6,VTO=1,LAMBDA=0.067)
.MODEL PIX PMOS (LEVEL=2,KP=20E-6,VTO=-
+0.7,LAMBDA=0.01,KF=1E-31)
.MODEL NIX NMOS (LEVEL=2,KP=20E-
+6,VTO=0.7,LAMBDA=0.01,KF=1E-31)
.MODEL DX D(IS=1E-14)
.MODEL VSY_SWITCH VSWITCH(ROFF=100E3,RON=1,VOFF=-
+4.2,VON=-3.5)
.ENDS AD8542
REV. A
–11–
AD [ ANALOG DEVICES ]
