**                                                                           
** Property of Texas Instruments -- For Unrestricted Internal Use Only --    
** Unauthorized reproduction and/or distribution is strictly prohibited.     
** This product is protected under copyright law and trade secret law as     
** an unpublished work.  Created 1997, (C) Copyright 1997, 1998, 1999 Texas 
** Instruments.  All rights reserved.
**                                                                           
** These commodities are under U.S. Government distribution license          
** control. As such, they are not to be re-exported without prior            
** approval of the U.S. Department of Commerce.                              
**                                                                           
***************************************************************************
*
*   Process:     1833C07.0, 1833A07.0, 1833C07.B, 18C07.A, 18C07.B, 18C07.C
*   Component:   RES_NWELL
*   Description: Nwell Resistor  
*   Strength:    High
*   Model:       Passive Subcircuit
*   Source:      Process Control Document
*   SPICE:       HSPICE 98.4 or later
*   Ownership:   TI SPICE Modeling Lab
*   Other:       
*
*   Library Version : 2000.04.26
*
*   Model Version:    Final 1.01
*      
***************************************************************************
**                                                                          **
**       REVISION      DATE              DESCRIPTION OF REVISION(S)         **
**                                                                          **
**        a1.0     25 JULY '97           3-Terminal Scalable Model          **
**        a1.1     20 FEB  '98           3-Terminal Scalable Model          **
**  Final 1.00     01 MAR  '99           Resistor properties changed        **
**                                       in accordance with PCD changes     **
**                                       and model re-formatted to MSP/ASIC **
**                                       standard                           **
**  Final 1.01     04 APR  '00           Corrected node connection for D2P  **
**                                       in NWELL resistor model subcircuit **
**                                                                          **
***************************************************************************
*
* Notices:
*      
*  1. TCs good from 25C to 125C.  Nominal temperature is 25C.
*  2. Each simulator requires its own file format.  Check to make sure the
*     "SPICE" line in the title block above matches your simulator.
*  3. Please do not alter any part of this file.  If you would like to make
*     a change, contact the TI SML staff.
*  4. All models created by the TI SML from PCD information.
*      
***************************************************************************
*
* Contents:
*
* Model Cards     
* RES_NWELL_18C07        Nwell Resistor Body
* RES_NW_HD_18C07   Nwell Resistor Head
*      
* Subcircuit Model
* R_NWELL_18C07          Nwell Resistor
*
***************************************************************************
*
* Subcircuit:
*
*                    Rhead   Rbody   Rhead
*       o------------/\/\/---/\/\/---/\/\/------------o
*         |       |                         |       |
*        _|__    _|__		           _|__    _|__
* DnwpsA  /\      /\ DnwpsP	    DnwpsA  /\      /\ DnwpsP
*        /__\    /__\		           /__\    /__\
*         |       | 		            |       |
*         |_______| 		            |_______|
*             |			                |
*             -----------------------------------
*                              |
*                              o
*
* Rhead=RSH_head/(W-WR)
* Rbody=RSH_body*(L-LR)/(W-WR)
* Area of nwell/psub diode DnwpsA=(L-LR)*(W-WR)/2
* Area (perimeter) of nwell/psub diode DnwpsP=(L-LR)
*
***************************************************************************
* Technology "Shrink"/Scaling factor
.param NWELL_SCALE = 0.5
* Technology (PCD) Parameters
* Body resistance (ohm/square)
.param RES_NWELL_B = 500
* Resistor head resistivity (ohm-micron)
.param RES_NWELL_H = 500
* Width reduction (microns)
.param RES_NWELL_WR = 0.45
* Length reduction (microns)
.param RES_NWELL_LR = 0.0
* Nwell resistor body temperature coefficients
*
* Parameter changes in translation: 
*
*   Parameter  TI-SPICE        HSPICE         
*   -------------------------------------------------
*   TNOM       25              renamed to TREF
*
.MODEL RES_NWELL_18C07 R
+ SCALE    = 1.15
+ TC1      = 0.0027
+ TC2      = 9.5e-06
+ TREF     = 25
* Nwell resistor head temperature coefficients
*
* Parameter changes in translation: 
*
*   Parameter  TI-SPICE        HSPICE         
*   -------------------------------------------------
*   TNOM       25              renamed to TREF
*
.MODEL RES_NW_HD_18C07 R
+ SCALE    = 1.43
+ TC1      = 0.005
+ TC2      = 2e-05
+ TREF     = 25
***************************************************************************
.SUBCKT R_NWELL_18C07 R0 R1 SUB W = 0.0 L = 0.0 
RH1 R0 P1  RES_NW_HD_18C07 R='RES_NWELL_H/(W*NWELL_SCALE-RES_NWELL_WR)'
RB P1 P2  RES_NWELL_18C07 R='RES_NWELL_B*(L*NWELL_SCALE-RES_NWELL_LR)/(W*NWELL_SCALE-RES_NWELL_WR)'
RH2 P2 R1  RES_NW_HD_18C07 R='RES_NWELL_H/(W*NWELL_SCALE-RES_NWELL_WR)'
D1A  SUB R0  DIODE_NW_PSUBA_18C07 AREA = '1e-12*((W*NWELL_SCALE-RES_NWELL_WR)*(L*NWELL_SCALE-RES_NWELL_LR)/2)'
D1P  SUB R0  DIODE_NW_PSUBP_18C07 AREA = '1e-12*(L*NWELL_SCALE-RES_NWELL_LR)'
D2A  SUB R1  DIODE_NW_PSUBA_18C07 AREA = '1e-12*((W*NWELL_SCALE-RES_NWELL_WR)*(L*NWELL_SCALE-RES_NWELL_LR)/2)'
D2P  SUB R1  DIODE_NW_PSUBP_18C07 AREA = '1e-12*(L*NWELL_SCALE-RES_NWELL_LR)'
.ENDS R_NWELL_18C07 
***************************************************************************
* Converted by SCONV ver. 5.19
