3 - IN-

4 - OUT

5 - Vcc

subcircuit

* LMX321 MACROMODEL * ------------------------------ * Revision 0, 8/2003 * ------------------------------ * The LMX321 family of op amps are low-cost, low-voltage, general purpose opamps. * These devices offer rail to rail outputs and ground sensing inputs and operate * from single +2.3V to +7V suppply. * ------------------------------ * Connections * 1 = IN+ * 2 = VEE * 3 = IN- * 4 = OUT * 5 = VCC ************************** .SUBCKT LMX321 1 2 3 4 5 XAMP1 5 2 1 3 4 OPAMP .ENDS ************************** ************************** .SUBCKT OPAMP 10 18 7 6 75 * 10 = VCC * 18 = VEE * 7 = IN+ * 6 = IN- * 75 = OUT ***************** VS1 10 11 0V IBIAS 11 12 61.3U DBIAS 18 12 DA RE1 12 91 1.005K RE2 12 92 1.005K QI1 13 15 91 QP1 *INPUT BIAS CURRENT AND OFFSET QI2 14 16 92 QP2 RIN1 15 20 3MEG *COMMON MODE INPUT RESISTANCE RIN2 16 20 3MEG DIN1 15 10 DB DIN2 18 15 DB DIN3 16 10 DB DIN4 18 16 DB ECR1 15 32 111 20 1 *DC PSRR AND CMRR VOS 17 32 1M *INPUT OFFSET VOLTAGE DP1 17 112 DB *INPUT PROTECTION DIODES DP2 112 113 DB DP3 113 16 DB DP4 16 114 DB DP5 114 115 DB DP6 115 17 DB RP1 17 7 3.5K RP2 16 6 3.5K RC1 13 18 1.856K RC2 14 18 1.856K C1 13 14 14.0P FSUP 18 10 VS1 1 *TO COMPENSATE SUPPLY CURRENT ***************** *GAIN STAGE *106dB GAIN GA 21 20 14 13 326.8U RO1 21 20 30606 GB 22 20 21 20 1 RO2 22 20 20K EF 23 20 22 20 1 CC 23 21 36.8P *DOMINANT POLE AT 6.5HZ EG 20 18 10 18 0.5 GCP 22 20 110 20 10 *PSRR AC RESPONSE ***** DVL1 22 33 DA *VOLTAGE LIMITING VMIN1 59 33 6.85M DVL2 34 22 DA VMIN2 34 60 4M ELIM2 59 61 10 18 0.5 ELIM1 63 60 10 18 0.5 ECOMP2 62 20 65 66 1 ECOMP1 64 20 65 66 1 HCOMP2 62 61 VIS3 53.4 HCOMP1 64 63 VIS3 32.52 ***************** EOUT 65 20 22 20 1 *VOLTAGE FOLLOWER ROUT1 65 66 150 *OPEN LOOP OUTPUT RESISTANCE VIS3 66 67 0V ***************** **CURRENT LIMIT DSC1 67 68 DA DSC2 69 67 DA DSC3 69 70 DA DSC4 70 68 DA ISC1 68 69 25MA *LIMITING CURRENT T0 25MA RSC 68 69 10MEG ***************** ROUT2 70 75 0.1M RLOAD 75 20 10MEG ***************** *SUPPLY CURRENT *BIAS CURRENT DSUP 18 10 DB RSUP 10 18 200K ISUP 10 18 95UA *BIAS CURRENT *LOAD CURRENT FSUP1 20 77 VIS3 1 CSUP 77 20 1P DSUP1 20 77 DB DSUP2 77 78 DB VIS4 78 20 0V FSUP2 10 18 VIS4 1 ***************** *PSRR DC AND AC ESUP1 79 20 10 18 1 CPSRR 79 80 7.5P RPSRR 80 20 5K GPSRR1 20 110 80 20 0.05 *AC GPSRR2 20 111 79 20 10.5U *DC -92dB RRDC 111 20 1 RRR 110 20 1 ***************** *CMRR DC AND AC ECM1 81 20 12 18 1 GCM2 20 111 81 20 10U *DC -96dB ***************** *MAX COMMON MODE INPUT VCC-0.9V DIL 12 83 DA RIL 83 84 50 VIL 85 84 0.9V EIL 85 18 10 18 1 ***************** *MINIMUM SUPPLY VOLTAGE SET AT 2.3 DVL3 18 12 DA DVL4 12 86 DA FVL 86 18 VIS5 1 VVL 87 18 2.3V VIS5 87 88 0V DVL5 88 89 DA RVL 89 90 300 EVL1 90 18 10 18 1 ********************************************************** .MODEL QP1 PNP(IS=16E-15 BF=1700) .MODEL QP2 PNP(IS=16E-15 BF=1610.5) .MODEL DA D(N=0.1M) .MODEL DB D(IS=100E-14) ********************************************************** .ENDS * Copyright (c) 2003-2012 Maxim Integrated Products. All Rights Reserved.