* MAX4285 MACROMODEL * ------------------------------ * Revision 0, 3/2004 * ------------------------------ * The MAX4285 Single ADC buffer amplifiers combine high speed performance and * single +3V supply operation. It offers a disable feature that reduces power * supply current and places the output in high-impedance state. * ------------------------------ * Connections * 1 = OUT * 2 = VEE * 3 = IN+ * 4 = IN- * 5 = DISABLE\ * 6 = VCC *************************************** *$ *************************************** .SUBCKT MAX4285 1 2 3 4 5 6 XAMP 6 2 3 4 1 5 MAX4285_S .ENDS *************************************** .SUBCKT MAX4285_S 10 18 17 16 70 91 * 10 = VCC * 18 = VEE * 17 = IN+ * 16 = IN- * 91 = DISABLE\ * 70 = OUT ***************** VS1 10 11 0V GBIAS 11 12 96 20 3.830M DBIAS 18 12 DA *INPUT BIAS CURRENT AND OFFSET QI1 13 15 191 QP1 QI2 14 16 192 QP2 RE1 12 191 56.2 RE2 12 192 56.2 DIN1 15 10 DB DIN2 18 15 DB DIN3 16 10 DB DIN4 18 16 DB CIN1 15 20 2P CIN2 16 20 2P VOS 17 32 1.5M *PSRR AND CMRR ECMPS1 15 32 A111 20 1 RC1 13 18 70 RC2 14 18 70 C1 13 19 4P RZ 19 14 475 FSUP 18 10 VS1 1 ***************** GP 20 101 14 13 2.5M RP 101 20 400 ***************** *GAIN STAGE GA 21 20 101 20 20.0M RO1 21 20 500 GB 22 20 21 20 1 RO2 22 20 5.012K EF 23 20 22 20 1 CC 23 21 12.30P EG 20 18 10 18 0.5 GACRR 20 22 A110 20 1 ***** DVL1 22 33 DA VMIN1 59 33 0.027 DVL2 34 22 DA VMIN2 34 60 0.027 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 1M HCOMP1 64 63 VIS3 1M ***************** EOUT 65 20 22 20 1 ROUT1 65 66 17 VIS3 66 67 0V ***************** *CURRENT LIMIT DSC1 67 68 DA DSC2 69 67 DA DSC3 69 70 DA DSC4 70 68 DA GSC1 68 69 96 20 106M ILK 68 69 700N RSC1 68 69 10MEG RSC 67 70 1MEG ***************** *SUPPLY CURRENT *BIAS CURRENT DSUP 18 10 DB ISUP 10 18 1MA GSUP 10 18 96 20 23M *LOAD CURRENT FSUP1 20 77 VIS3 1 CSUP 77 20 0.05P DSUP1 20 77 DB DSUP2 77 78 DB VIS4 78 20 0V FSUP2 10 18 VIS4 1 ***************** *SHUTDOWN RSHIN 91 20 500K ESH3 220 20 91 18 1 RSHA 220 221 1K CSHA 221 20 32P ESH2 92 20 221 20 1 RSH1 92 93 100 VSH1 93 94 0V EHYS 95 94 POLY(2) 10 18 96 20 0 0 0 0 0.333 RBL 94 20 10K ESH1 95 20 10 18 0.667 **** FSH1 20 96 VSH1 1 CSH1 96 20 10P DSH2 20 96 DA DSH1 96 97 DA VSH2 97 20 1V RSH2 96 20 100K ***************** *MAX COMMON MODE INPUT VCC-1.25V DIL 12 83 DA RIL 83 84 62.5 VIL 85 84 0.905V EIL 85 18 10 18 1 ***************** *MINIMUM SUPPLY VOLTAGE SET AT 4.5 OR +/-2.25 DVL3 18 12 DA DVL4 12 86 DA FVL 86 18 VIS5 1 VVL 87 18 2.79V VIS5 87 88 0V DVL5 88 89 DA RVL 89 90 300 EVL1 90 18 10 18 1 ***************** *PSRR DC VEREF 224 18 5V GPSRR2 20 A111 10 224 3.162M EPS1 225 20 10 18 1 CPS1 225 226 1P RPS1 226 20 53 GPSRR1 A110 20 226 20 1 RRDC A111 20 1 RRAC A110 20 1 ***************** *CMRR DC ECM1 81 18 12 18 1 VCM 227 18 3V GCM2 20 A111 81 227 5.55M ********************************************************** .MODEL QP1 PNP(IS=16E-15 BF=295.44) .MODEL QP2 PNP(IS=16E-15 BF=291.00) .MODEL DA D(N=0.1M) .MODEL DB D(IS=100E-14) ********************************************************** .ENDS *$