*////////////////////////////////////////////////////////////////////// * (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 *////////////////////////////////////////////////////////// *LM324 Low Power Quad OPERATIONAL AMPLIFIER MACRO-MODEL *////////////////////////////////////////////////////////// * * connections: non-inverting input * | inverting input * | | positive power supply * | | | negative power supply * | | | | output * | | | | | * | | | | | .SUBCKT LM324 1 2 99 50 28 * *Features: *Eliminates need for dual supplies *Large DC voltage gain = 100dB *High bandwidth = 1MHz *Low input offset voltage = 2mV *Wide supply range = +-1.5V to +-16V * *NOTE: Model is for single device only and simulated * supply current is 1/4 of total device current. * Output crossover distortion with dual supplies * is not modeled. * ****************INPUT STAGE************** * IOS 2 1 5N *^Input offset current R1 1 3 500K R2 3 2 500K I1 99 4 100U R3 5 50 517 R4 6 50 517 Q1 5 2 4 QX Q2 6 7 4 QX *Fp2=1.2 MHz C4 5 6 128.27P * ***********COMMON MODE EFFECT*********** * I2 99 50 75U *^Quiescent supply current EOS 7 1 POLY(1) 16 49 2E-3 1 *Input offset voltage.^ R8 99 49 60K R9 49 50 60K * *********OUTPUT VOLTAGE LIMITING******** V2 99 8 1.63 D1 9 8 DX D2 10 9 DX V3 10 50 .635 * **************SECOND STAGE************** * EH 99 98 99 49 1 G1 98 9 POLY(1) 5 6 0 9.8772E-4 0 .3459 *Fp1=7.86 Hz R5 98 9 101.2433MEG C3 98 9 200P * ***************POLE STAGE*************** * *Fp=2 MHz G3 98 15 9 49 1E-6 R12 98 15 1MEG C5 98 15 7.9577E-14 * *********COMMON-MODE ZERO STAGE********* * *Fpcm=10 KHz G4 98 16 3 49 5.6234E-8 L2 98 17 15.9M R13 17 16 1K * **************OUTPUT STAGE************** * F6 50 99 POLY(1) V6 300U 1 E1 99 23 99 15 1 R16 24 23 17.5 D5 26 24 DX V6 26 22 .63V R17 23 25 17.5 D6 25 27 DX V7 22 27 .63V V5 22 21 0.27V D4 21 15 DX V4 20 22 0.27V D3 15 20 DX L3 22 28 500P RL3 22 28 100K * ***************MODELS USED************** * .MODEL DX D(IS=1E-15) .MODEL QX PNP(BF=1.111E3) * .ENDS *$