* AD780B SPICE Macromodel 5/93, Rev. A * AAG / PMI * * This version of the AD780 voltage reference model simulates the worst case * parameters of the 'B' grade. The worst case parameters used * correspond to those in the data sheet. * * Copyright 1993 by Analog Devices, Inc. * * Refer to "README.DOC" file for License Statement. Use of this model * indicates your acceptance with the terms and provisions in the License Statement. * * NODE NUMBERS * VIN * | TEMP * | | GND * | | | TRIM * | | | | VOUT * | | | | | RANGE * | | | | | | .SUBCKT AD780B 2 3 4 5 6 8 * * BANDGAP REFERENCE * I1 4 40 DC 1.21369E-3 R1 40 4 1E3 TC=3E-6 EN 10 40 42 0 1 G1 4 10 2 4 4.85668E-9 F1 4 10 POLY(2) VS1 VS2 (0,2.42834E-5,3.8E-5) Q1 2 10 11 QT I2 11 4 DC 12.84E-6 R2 11 3 1E3 I3 3 4 DC 0 * * NOISE VOLTAGE GENERATOR * VN1 41 0 DC 2 DN1 41 42 DEN DN2 42 43 DEN VN2 0 43 DC 2 * * INTERNAL OP AMP * G2 4 12 10 20 1.93522E-4 R3 12 4 2.5837E9 C1 12 4 6.8444E-11 D1 12 13 DX V1 2 13 DC 1.2 * * SECONDARY POLE @ 508 kHz * G3 4 14 12 4 1E-6 R4 14 4 1E6 C2 14 4 3.1831E-13 * * OUTPUT STAGE * ISY 2 4 6.8282E-4 FSY 2 4 V1 -1 RSY 2 4 500E3 * G4 4 15 14 4 25E-6 R5 15 4 40E3 Q2 4 15 16 QP I4 2 16 DC 100E-6 Q3 4 16 18 QP R6 18 23 15 R7 16 21 150E3 R8 2 17 34.6 Q4 17 16 19 QN R9 21 20 6.46E3 R10 20 4 6.1E3 R11 20 5 53E3 R12 20 8 15.6E3 I5 5 4 DC 0 I6 8 4 DC 0 VS1 21 19 DC 0 VS2 23 21 DC 0 L1 21 6 1E-7 * * OUTPUT CURRENT LIMIT * FSC 15 4 VSC 1 VSC 2 22 DC 0 QSC 22 2 17 QN * .MODEL QT NPN(IS=1.56E-16 BF=1E4) .MODEL QN NPN(IS=1E-15 BF=1E3) .MODEL QP PNP(IS=1E-15 BF=1E3) .MODEL DX D(IS=1E-15) .MODEL DEN D(IS=1E-12 RS=2.425E+05 AF=1 KF=6.969E-16) .ENDS AD780B