* Copyright (c) 1998-2022 Analog Devices, Inc. All rights reserved. * .subckt AD8237 1 2 3 4 5 6 7 8 VOS N014 IN+ 37.5e-6 VOS1 N025 REF 37.5e-6 I23 IN- 0 -1e-12 I24 FB 0 -1e-12 I1 IN+ 0 -650e-12 I2 REF 0 -650e-12 G7 0 V+ N016 V+ 1 R4 0 V+ 10E9 G8 0 V- N004 V- 1 R5 0 V- 10E9 G1 0 IN+ N021 N023 1.26e-9 R13 N023 IN+ 10e9 G2 0 IN- N021 N023 1.26e-9 R14 IN- N021 10E9 R16 N023 -Vs 10E9 R15 +Vs N023 10E9 E10 VPOSx 0 +Vs 0 1 E11 VNEGx 0 -Vs 0 1 I3 +Vs -Vs 130E-6 H3 N003 IN- V24 67.3 V24 N001 0 0 R19 N001 0 0.0166 G4 0 Out_inp V- V+ 100E-6 G5 0 Out_inp FB N025 100E-6 R10 Out_inp 0 10E9 R11 Out_inp 0 10E9 G6 0 sub_out 0 Out_inp 1 R1 0 sub_out 10E9 C1 N020 sub_out 85E-12 C2 N019 N020 25E-12 D7 V+ N012 D D8 N018 V+ D V3 VPOSx N012 0.55 V4 N018 VNEGx 0.6 D9 V- N002 D D10 N006 V- D V5 VPOSx N002 0.55 V6 N006 VNEGx 0.6 EPSRR+ N015 N014 N100 N200 1 E1 N100 0 N024 0 1 R6 N100 N200 1 R7 N200 0 1E6 C3 N200 0 0.3E-6 R9 N024 0 1E6 C4 +Vs N024 100e-6 EPSRR- N004 N003 N300 N400 1 E2 N300 0 N026 0 1 R12 N300 N400 0.5 R17 N400 0 1E6 C5 N400 0 0.5E-6 R18 N026 0 1E6 C6 -Vs N026 100e-6 D16 N9999 N009 DX D18 N017 N9999 DX V1 N017 N022 0.7 V13 N005 N009 0.7 H1 VPOSx N005 POLY(1) V_current 0 -29.4 5880.5 -500000000 H2 N022 VNEGx POLY(1) V_current 0 50 -18820 590000000 V_current VOUT N9999 0 ECMRR N016 N015 cmrr_out 0 1 L2 N028 0 15 R24 N028 cmrr_out 500 G12 0 cmrr_out VCM 0 8E-10 R22 IN+ VCM 10e9 R23 IN- VCM 10e9 G11 IN+ IN- IN+ IN- -0.5e-8 S1 N020 N019 BW 0 SW G9 0 N013 sub_out 0 0.0023 R21 N013 0 500 C7 N013 0 2e-9 C8 IN- 0 10e-12 C10 IN+ 0 10e-12 E3 N010 V- VPOSX N007 1 E4 V- N011 VPOSX N008 1 D1 V+ N010 D D2 N011 V+ D V7 N007 VNEGX 1.6 V8 N008 VNEGX 1.6 G3 0 REF N027 N029 1.26e-9 R8 FB N027 10e9 R20 REF N027 10e9 G10 0 FB N027 N029 1.26e-9 R2 N029 +Vs 10e9 R3 N029 -Vs 10e9 R28 Out_inp N019 10k R9999 N9999 N013 0.01 R25 +Vs 5 1µ Noiseless R26 IN+ 2 1µ Noiseless R27 IN- 3 1µ Noiseless R29 REF 6 1µ Noiseless R30 -Vs 4 1µ Noiseless R31 BW 1 1µ Noiseless R32 8 VOUT 1µ Noiseless R33 7 FB 1µ Noiseless I4 BW 0 1f .model SW Vswitch (Ron=1e-3 Roff=1e9 Von=-2.5 Voff=+2.5 Vh=0) .model D D .model DX D IS=1E-14 EG=0.6 .ends AD8237