******************************************************************************* * Copyright (C) Maxim Integrated Products, Inc., All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included * in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. * * Except as contained in this notice, the name of Maxim Integrated * Products, Inc. shall not be used except as stated in the Maxim Integrated * Products, Inc. Branding Policy. * * The mere transfer of this software does not imply any licenses * of trade secrets, proprietary technology, copyrights, patents, * trademarks, maskwork rights, or any other form of intellectual * property whatsoever. Maxim Integrated Products, Inc. retains all * ownership rights. *************************************************************** * The MAX253 is a monolithic oscillator/power-driver specifically designed * to provide isolated power for an isolated RS-485 or RS-232 data interface. * ------------------------------ *Note: ** Macro model is developed using the typical device parameters given in the data sheet with 5 volts power supply. Model does not take care of the device non-linearity with temperature variations. Model characteristics may not match actual device behavior at abnormal operating conditions. * ------------------------------ .subckt MAX253 1 2 3 4 5 6 7 8 * | | | | | | | | * | | | | | | | | * | | | | | | | | * | | | | | | | Open drain of N-channel transformer drive 2 * | | | | | | | * | | | | | | Ground * | | | | | | * | | | | | Supply voltage * | | | | | * | | | | Not internally connected * | | | | * | | | Shutdown * | | | * | | Frequency switch * | | * | Ground * | * Open drain of N-channel transformer drive 1 * * Date of model creation: * 10/2008 * * * Revision History: * Version 0 * Version 1 * * Recommendations: * Use SIMETRIX (or SPICE 2G6; other simulators may require translation) * For a quick, effective design, use a combination of: data sheet * specs, bench testing, and simulations with this macromodel * * * Supported: * Switching Frequency , Switching waveform ,DC supply current , Leakage current * Model works only at temperature of 27 degree celsius. * * * Not Supported: * Model does not take care of the device non-linearity with temperature variations. * * * Known Discrepancies in Model vs. Datasheet: * * ************************************************************************************************** D_MAX253_D3 MAX253_N12511147 MAX253_N125271341 diodemacro_ideal I_MAX253_I4 6 7 DC 0.4uA D_MAX253_CO10_D2 7 MAX253_SDR diodemacro_mostideal G_MAX253_CO10_G1 MAX253_SDR 7 4 VREF -1E6 D_MAX253_CO10_D1 MAX253_SDR VDD diodemacro_mostideal D_MAX253_D4 MAX253_N125272000 MAX253_N12511147 diodemacro_ideal V_MAX253_V2 MAX253_N12501179 7 +PULSE 1 0 0 10n 10n 1.4286u 2.8572u M_MAX253_M4 8 MAX253_N12510516 7 7 NHVT L=1u W=1.6m M_MAX253_M2 MAX253_N12501179 MAX253_FSR MAX253_N12500961 7 NCHJ L=1u + W=525u G_MAX253_G2 6 7 MAX253_SDR 7 -0.9E-4 R_MAX253_R6 MAX253_N125272000 MAX253_N12510451 0.5 M_MAX253_M6 MAX253_N12510516 MAX253_SDR 7 7 NJNT L=1u W=2u E_MAX253_E2 MAX253_N12510705 7 6 MAX253_N12511147 1 R_MAX253_R7 MAX253_N125270721 MAX253_N12510516 6 C_MAX253_C3 7 MAX253_N12510516 5n D_MAX253_D1 MAX253_N12510705 MAX253_N125270721 diodemacro_ideal R_MAX253_R1 3 VDD 1000G E_MAX253_E1 MAX253_FSRN 7 VDD MAX253_FSR 1 D_MAX253_D2 MAX253_N125270920 MAX253_N12510705 diodemacro_ideal E_MAX253_E2P1 MAX253_N12511147 7 POLY(2) 6 7 MAX253_N12500961 7 0 0 0 0 + 1 I_MAX253_I3 3 7 DC 10pA I_MAX253_I5 6 7 DC 0.45mA R_MAX253_R4 MAX253_N125270920 MAX253_N12510516 0.5 M_MAX253_M3 1 MAX253_N12510451 7 7 NHVT L=1u W=1.6m V_MAX253_V4 VDD 7 5V G_MAX253_G1 3 7 MAX253_FSRN 7 10E-6 R_MAX253_R5 MAX253_N125271341 MAX253_N12510451 6 V_MAX253_V3 VREF 7 1.6V M_MAX253_M5 MAX253_N12510451 MAX253_SDR 7 7 NJNT L=1u W=2u D_MAX253_CO9_D2 7 MAX253_FSR diodemacro_mostideal G_MAX253_CO9_G1 MAX253_FSR 7 3 VREF -1E6 D_MAX253_CO9_D1 MAX253_FSR VDD diodemacro_mostideal C_MAX253_C1 7 MAX253_N12510451 5n V_MAX253_V1 MAX253_N12501169 7 +PULSE 1 0 0 10n 10n 2.5u 5u M_MAX253_M1 MAX253_N12501169 MAX253_FSRN MAX253_N12500961 7 NCHJ L=1u + W=525u I_MAX253_I1 4 7 DC 10pA ****************** .model diodemacro_ideal d(n=0.001) .model diodemacro_mostideal d(IS=1E-12 N=0.000001 BV=35 IBV=1) .model NJNT nmos(VTO=0.5 KP=50E-2) .model NCHJ nmos(VTO=0.5 KP=100E-6 CGSo=3E-9) .model NHVT nmos(VTO=1.0 KP=100E-6) .ENDS MAX253 ******************