* MAX4464 MACROMODEL * ---------------------------- * Revision 1. 8/2003 * ---------------------------- * The MAX4464 is a Micro power opamp operates from a single +1.8 to +5.5 * supply with supply current less than 750nA and feature ground sensing * inputs and Rail-to-Rail output. * ---------------------------- * Connections * 1 = Noninverting input of the amplifier * 2 = Negative power supply * 3 = Inverting input of the amplifier * 4 = Amplifier output * 5 = Positive power supply *----------------------------- ***************************** .SUBCKT MAX4464 1 2 3 4 5 XOPAMP 1 2 3 4 5 OPAMP .ENDS ***************************** ***************************** .SUBCKT OPAMP 17 18 15 42 10 ***************************** *INPUT STAGE VS1 10 11 0V IBIAS 11 12 7.978UA M1 13 16 12 11 MOSFET M2 14 15 12 11 MOSFET VOS 17 16 500U *INPUT OFFSET VOLTAGE RD1 13 18 10K RD2 14 18 10K C1 13 14 40P *SECOND ORDER POLE AT 200KHZ DIN1 16 11 DA *INPUT VOLTAGE LIMITING DIODES DIN2 18 16 DA DIN3 15 11 DA DIN4 18 15 DA FSUP 18 10 VS1 1 *TO COMPENSATE SUPPLY CURRENT ************** *INPUT BIAS CURRENT RIB1 12 16 1.4G RIB2 12 15 1.3125G * BIAS CURRENT OFFSET ************** *MAXIMUM INPUT COMMON MODE VOLTAGE LIMIT DIL 12 80 DY RIL 80 82 10K VIL 81 82 820MV EIL 81 18 10 18 1 ************** *MINIMUM SUPPLY VOLTAGE LIMIT VVL 85 18 1.4V VIS4 85 86 0V RVL 86 87 100K DVL3 87 88 DY EVL 88 18 10 18 1 DVL4 18 12 DY DVL5 12 84 DY FVL 84 18 VIS4 4 *GAIN REDUCES FROM 1.4V SUPPLY TO 1.2V SUPPLY *WITH ZERO GAIN AT 1.2V SUPPLY ************************************************** *GC 100 101 14 13 10U *RP1 100 101 100K *************** *GAIN STAGE GA 25 100 14 13 4U RO1 25 100 5MEG GB 26 100 25 100 0.7143 RO2 26 100 70K EF 27 100 26 100 1 *VOLTAGE FOLLOWER FOR FEEDBACK RLF 27 100 1MEG CC 25 26 15.6P *OPEN LOOP POLE AT 0.040HZ *************** *VOLTAGE LIMITING DP1 26 151 DY EP1 151 153 10 18 0.5 EP3 153 155 26 199 1 HCOMP1 100 155 VIS2 160 DP2 152 26 DY EP2 154 152 10 18 0.5 EP4 156 154 199 26 1 HCOMP2 100 156 VIS2 40 ************************************************** *CMRR (CMRR FREQUENCY RESPONSE NOT ADDED) GCM 100 25 18 12 71.13P ************************************************** *PSRR (PSRR FREQUENCY RESPONSE NOT ADDED) GPS 100 25 10 18 126.5P ************************************************** **************** RO3 27 199 130 *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 11M RILIM 28 30 10K *********** VIS1 34 29 0V FSW 100 36 VIS1 1 *CONTROL GIL DEPENDING ON THE CURRENT DIRECTION 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 25M ************************************************** VIS2 34 42 0V ************************************************** *INTERNAL GROUND AT VDD/2 EG1 100 18 10 18 0.5 ************************************************** *SUPPLY CURRENT MODEL *STANDBY CURRENT ISUP 10 18 600N 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 *LOAD CURRENT COMPENSATING SOURCE ************************************************** .MODEL DA D(IS=100E-14 RS=0.5k) .MODEL MOSFET PMOS(VTO=-0.2 KP=12.57E-4 KF=1.51E-25 AF=0.20) .MODEL DX D(IS=100E-14) .MODEL DZ D(N=10M) .MODEL DY D(IS=100E-14 N=0.1M) ************************************************** .ENDS