* MAX4028 MACROMODEL * ------------------------------ * Revision 0, 11/2004 * ------------------------------ * MAX4028 is a 5V triple, 2:1 voltage-feedback multiplexer * amplifier with input clamps and a fixed gain of 2V/V. * ------------------------------ * Connections * 1 = IN3A * 2 = IN2A * 3 = IN1A * 4 = A/B_ * 5 = KEYREF * 6 = IN1B * 7 = IN2B * 8 = IN3B * 9 = CLAMP/KEY_3_ * 10 = GND * 11 = OUT3 * 12 = CLAMP/KEY_2_ * 13 = OUT2 * 14 = VCC * 15 = OUT1 * 16 = DISABLE_ *************************************** .SUBCKT MAX4028 1 2 3 4 5 6 7 8 9 10 + 11 12 13 14 15 16 **************** X1 3 6 15 4 16 14 10 MAX4028AMPF X2 2 7 13 4 12 16 14 10 17 MAX4028AMPV X3 1 8 11 4 9 16 14 10 17 MAX4028AMPV **************** X4 5 17 10 MAX4028KCREF .ENDS *************************************** *************************************** .SUBCKT MAX4028AMPF 1 2 3 4 5 6 7 X1 5 7 3 6 1 2 4 18 20 MAX4028AMP VCL1A 18 7 0.2 VCL1B 20 7 0.2 *OUTPUT CLAMP VOH 12 7 2.8 DOH 3 12 DX .MODEL DX D(N=0.002 CJO=1E-18) .ENDS *************************************** *************************************** .SUBCKT MAX4028AMPV 1 2 3 4 5 6 7 8 9 X1 6 8 3 7 1 2 4 22 24 MAX4028AMP X2 22 24 5 25 26 27 28 8 MAX4028DMUX VCL2A 25 8 0.2 VCL2B 27 8 0.2 E21 26 8 9 8 1 E23 28 8 9 8 1 *OUTPUT CLAMP VOH 12 13 2.4 EOH 13 8 9 8 2 DOH 3 12 DX .MODEL DX D(N=0.002 CJO=1E-18) .ENDS *************************************** *************************************** .SUBCKT MAX4028AMP 1 4 6 7 8 9 10 11 12 *FEEDBACK RF 6 3 1K RIN 3 4 1K *INPUT STAGE **************** GQ 7 4 109 0 6.661M IQ 7 4 3.013M IEER 4 7 1.215M **************** IEE 7 99 1.215M RE1 99 40 49.85 RE2 99 50 49.85 Q1 20 3 40 QX Q2 30 2 50 QY RC1 20 4 96.886 RC2 30 4 96.886 **************** *INTERMEDIATE STAGE *POWER SUPPLY REJECTION ZERO AND POLE GPS1 21 22 7 4 7.54 RPS1 22 23 0.1 LPS1 23 21 159.134N GPS2 21 222 22 21 1M RPS2 21 222 1K CPS2 222 21 159.1P *GAIN STAGES GPSA 31 21 222 21 10U GA 31 21 20 30 11.47M R2 31 21 100K C2 31 33 4.5P E1 33 21 5 21 1 GB 21 5 31 21 1 RO2 21 5 35.0007K **************** *LEVEL SHIFTING STAGE VREF 21 4 2.5 **************** *OUTPUT DISABLE S1 5 6 1 4 SMOD3 **************** *DISABLE LOGIC ESHDNH 106 107 7 0 1 VSHDNH 0 107 3 ESHDNL 108 110 7 0 1 VSHDNL 0 110 4.2 DSHDNH 111 106 DX DSHDNL 108 111 DX RSC 111 112 1 VIMEAS 112 1 0 FDIS 109 0 VIMEAS 1 DL 0 109 DX DH 109 113 DX VCLAMP 113 0 1 RPU 109 114 1MEG VPU 114 0 0.5 **************** *2:1 INPUT MUX S2 313 2 10 4 SMOD1 S3 314 2 10 4 SMOD2 ***************** *INPUT CLAMP CIRCUIT VBE1 8 311 0.6 DCL1 11 311 DX ECL1 313 4 311 4 1 VBE2 9 312 0.6 DCL2 12 312 DX ECL2 314 4 312 4 1 ***************** *MODELS USED .MODEL QX PNP(BF=1492.537) .MODEL QY PNP(BF=1492.537) .MODEL DX D(N=0.002 CJO=1E-18) .MODEL SMOD1 VSWITCH(RON=0.001 ROFF=100MEG VON=2 VOFF=0.8) .MODEL SMOD2 VSWITCH(RON=0.001 ROFF=100MEG VON=0.8 VOFF=2) .MODEL SMOD3 VSWITCH(RON=0.001 ROFF=100G VON=2 VOFF=0.8) **************** .ENDS *************************************** *************************************** *KEY-CLAMP REFERENCE GENERATOR .SUBCKT MAX4028KCREF 1 2 3 VCLL 4 3 0.2 ECL 2 3 4 1 1MEG RF 2 1 5K RIN 1 3 5K .ENDS *************************************** *************************************** *2:4 DMUX .SUBCKT MAX4028DMUX 1 2 3 4 5 6 7 8 S11 1 4 3 8 SMOD1 S12 1 5 3 8 SMOD2 S21 2 6 3 8 SMOD1 S22 2 7 3 8 SMOD2 .MODEL SMOD1 VSWITCH(RON=0.001 ROFF=100MEG VON=2 VOFF=0.8) .MODEL SMOD2 VSWITCH(RON=0.001 ROFF=100MEG VON=0.8 VOFF=2) .ENDS ***************************************