*////////////////////////////////////////////////////////////////////// * (C) National Semiconductor, Inc. * Models developed and under copyright by: * National Semiconductor, Inc. *///////////////////////////////////////////////////////////////////// * Legal Notice: This material is intended for free software support. * The file may be copied, and distributed; however, reselling the * material is illegal *//////////////////////////////////////////////////////////////////// * For ordering or technical information on these models, contact: * National Semiconductor's Customer Response Center * 7:00 A.M.--7:00 P.M. U.S. Central Time * (800) 272-9959 * For Applications support, contact the Internet address: * amps-apps@galaxy.nsc.com *////////////////////////////////////////////////////////// *LM741 OPERATIONAL AMPLIFIER MACRO-MODEL *////////////////////////////////////////////////////////// * * connections: non-inverting input * | inverting input * | | positive power supply * | | | negative power supply * | | | | output * | | | | | * | | | | | .SUBCKT LM741 1 2 99 50 28 * *Features: *Improved performance over industry standards *Plug-in replacement for LM709,LM201,MC1439,748 *Input and output overload protection * ****************INPUT STAGE************** * IOS 2 1 20N *^Input offset current R1 1 3 250K R2 3 2 250K I1 4 50 100U R3 5 99 517 R4 6 99 517 Q1 5 2 4 QX Q2 6 7 4 QX *Fp2=2.55 MHz C4 5 6 60.3614P * ***********COMMON MODE EFFECT*********** * I2 99 50 1.6MA *^Quiescent supply current EOS 7 1 POLY(1) 16 49 1E-3 1 *Input offset voltage.^ R8 99 49 40K R9 49 50 40K * *********OUTPUT VOLTAGE LIMITING******** V2 99 8 1.63 D1 9 8 DX D2 10 9 DX V3 10 50 1.63 * **************SECOND STAGE************** * EH 99 98 99 49 1 G1 98 9 5 6 2.1E-3 *Fp1=5 Hz R5 98 9 95.493MEG C3 98 9 333.33P * ***************POLE STAGE*************** * *Fp=30 MHz G3 98 15 9 49 1E-6 R12 98 15 1MEG C5 98 15 5.3052E-15 * *********COMMON-MODE ZERO STAGE********* * *Fpcm=300 Hz G4 98 16 3 49 3.1623E-8 L2 98 17 530.5M R13 17 16 1K * **************OUTPUT STAGE************** * F6 50 99 POLY(1) V6 450U 1 E1 99 23 99 15 1 R16 24 23 25 D5 26 24 DX V6 26 22 0.65V R17 23 25 25 D6 25 27 DX V7 22 27 0.65V V5 22 21 0.18V D4 21 15 DX V4 20 22 0.18V D3 15 20 DX L3 22 28 100P RL3 22 28 100K * ***************MODELS USED************** * .MODEL DX D(IS=1E-15) .MODEL QX NPN(BF=625) * .ENDS *$[/url]