* MAX4487 MACROMODEL * ---------------------------- * Revision 0. 3/2004 * ---------------------------- * The MAX4487 low cost general purpose opamp operates from a single +2.7V to 5.5V * Supply, feature ground sensing inputs and rail to rail outputs and are unity * gain stable * ---------------------------- * Connections * 1 = OUTA * 2 = INA- * 3 = INA+ * 4 = VDD * 5 = INB+ * 6 = INB- * 7 = OUTB * 8 = OUTC * 9 = INC- * 10 = INC+ * 11 = VSS * 12 = IND+ * 13 = IND- * 14 = OUTD *----------------------------- ********************************** .SUBCKT MAX4487 1 2 3 4 5 6 7 8 9 10 11 12 13 14 XOPAMP1 3 11 2 1 4 MAX4487_S XOPAMP2 5 11 6 7 4 MAX4487_S XOPAMP3 10 11 9 8 4 MAX4487_S XOPAMP4 12 11 13 14 4 MAX4487_S .ENDS ********************************** ********************************** .SUBCKT MAX4487_S 17 18 15 42 10 ********************************** *INPUT STAGE VS1 10 11 0V IBIAS 11 12 363.76U M1 13 16 12 11 MOSFET M2 14 15 12 11 MOSFET VOS 17 16 300U RD1 13 18 1K RD2 14 18 1K C1 13 14 8.2P DIN1 16 11 DA CIN1 16 100 2P CIN2 15 100 2P DIN2 18 16 DA DIN3 15 11 DA DIN4 18 15 DA FSUP 18 10 VS1 1 ************** *INPUT BIAS CURRENT IBIAS1 12 16 0.1P IBIAS2 12 15 0.1P ************** *MAXIMUM INPUT COMMON MODE VOLTAGE LIMIT DIL 12 80 DY RIL 80 82 10K VIL 81 82 1020MV EIL 81 18 10 18 1 ************** *MINIMUM SUPPLY VOLTAGE LIMIT VVL 85 18 2.7V VIS4 85 86 0V RVL 86 87 10K DVL3 87 88 DY EVL 88 18 10 18 1 DVL4 18 12 DY DVL5 12 84 DY FVL 84 18 VIS4 4 ************************************************** *GAIN STAGE GA 25 100 14 13 439.82U RO1 25 100 2.274K GB 26 100 25 100 1.0 RO2 26 100 79.433K EF 27 100 26 100 1 RLF 27 100 1MEG CC 25 26 8P *************** *VOLTAGE LIMITING DP1 26 151 DY EP1 151 153 10 18 0.5 EP3 153 155 26 199 1 HCOMP1 100 155 VIS2 12.07 DP2 152 26 DY EP2 154 152 10 18 0.5 EP4 156 154 199 26 1 HCOMP2 100 156 VIS2 16.13 ************************************************** *CMRR (CMRR FREQUENCY RESPONSE NOT ADDED) GCM 100 25 18 12 247.29N ************************************************** *PSRR (PSRR FREQUENCY RESPONSE NOT ADDED) GPS 100 25 10 18 320.0N ************************************************** **************** RO3 27 199 100 *CURRENT LIMITING AT TWO LEVELS FOR SINK AND SOURCE D1 30 199 DY D2 199 28 DY D3 29 28 DY D4 30 29 DY ILIM1 28 30 27M RILIM 28 30 10K *********** VIS1 34 29 0V FSW 100 36 VIS1 1 D9 100 36 DX D10 36 35 DX D11 35 37 DY VLIM1 37 100 1V R1 35 100 1MEG CX1 35 100 0.050P GIL 28 30 35 100 6M ************************************************** VIS2 34 42 0V ************************************************** *INTERNAL GROUND AT VDD/2 EG1 100 18 10 18 0.5 ************************************************** *SUPPLY CURRENT MODEL *STANDBY CURRENT ISUP 10 18 2.2M DISUP 10 90 DY RISUP 90 91 20MEG VISUP 91 18 2.5V *************** *LOAD CURRENT DSUP 18 10 DX FIS1 100 60 VIS2 1 D17 100 60 DX D18 60 61 DX VIS3 100 61 0V FSUP1 18 10 VIS3 1 ************************************************** .MODEL DA D(IS=100E-14 RS=0.5k) .MODEL MOSFET PMOS(VTO=-0.2 KP=27.5E-4) .MODEL DX D(IS=100E-14) .MODEL DZ D(N=10M) .MODEL DY D(IS=100E-14 N=0.1M) ************************************************** .ENDS * Copyright (c) 2003-2012 Maxim Integrated Products. All Rights Reserved.