OP181 Datasheet, PDF (14/16 Pages) Analog Devices – Ultralow Power, Rail-to-Rail Output Operational Amplifiers

OP181/OP281/OP481
ECM1 11 98 POLY(2) (1, 98) (2, 98) 0 .5 .5
R1 11 12 1.59E6
C1 11 12 100E-12
R2 12 98 283
*
* POLE AT 900kHz
*
EREF 98 0 (90, 0) 1
G1 98 20 (4, 6) 1E-6
R3 20 98 1E6
C2 20 98 177E-15
*
* POLE AT 500kHz
*
E2 21 98 (20, 98) 1
R4 21 22 1E6
C3 22 98 320E-15
*
* GAIN STAGE
*
CF 45 40 8. 5E-12
R5 40 98 65. 65E6
G3 98 40 (22, 98) 4.08E-7
D3 40 41 DX
D4 42 40 DX
V3 99 41 DC 0.5
V4 42 50 DC 0.5
*
* OUTPUT STAGE
*
ISY 99 50 1.375E-6
RS1 99 90 10E6
RS2 90 50 10E6
M1 45 46 99 99 POX L=1.5u W=300u
M2 45 47 50 50 NOX L=1.5u W=300u
EG1 99 46 POLY(1) (98, 40) 0.77 1
EG2 47 50 POLY(1) (40, 98) 0.77 1
*
* MODELS
*
.MODEL POX PMOS (LEVEL=2, KP=25E-6, VTO=-0.75, LAMBDA=0.01)
.MODEL NOX NMOS (LEVEL=2, KP=25E-6, VTO=0.75, LAMBDA=0.01)
.MODEL PIX PNP (BF=200)
.MODEL DX D(IS=1E-14)
.ENDS
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