Version 4 SHEET 1 1404 1236 WIRE 320 832 320 784 WIRE 320 960 320 912 WIRE 464 224 464 176 WIRE 464 352 464 304 WIRE 464 480 464 448 WIRE 464 592 464 560 WIRE 608 176 464 176 WIRE 608 288 608 176 WIRE 608 384 608 352 WIRE 608 784 320 784 WIRE 608 896 608 784 WIRE 608 992 608 960 WIRE 640 288 608 288 WIRE 640 352 608 352 WIRE 640 896 608 896 WIRE 640 960 608 960 WIRE 704 176 608 176 WIRE 704 784 608 784 WIRE 864 176 784 176 WIRE 864 288 832 288 WIRE 864 288 864 176 WIRE 864 352 832 352 WIRE 864 416 832 416 WIRE 864 784 784 784 WIRE 864 800 864 784 WIRE 864 896 832 896 WIRE 864 896 864 880 WIRE 864 1072 832 1072 WIRE 864 1104 864 1072 WIRE 864 1216 864 1184 WIRE 896 1072 864 1072 WIRE 944 784 864 784 WIRE 944 960 832 960 WIRE 944 960 944 784 WIRE 1008 176 864 176 WIRE 1008 224 1008 176 WIRE 1008 352 1008 304 WIRE 1056 784 944 784 WIRE 1056 832 1056 784 WIRE 1056 960 1056 912 FLAG 608 992 0 FLAG 608 384 0 FLAG 864 352 vcc FLAG 864 1216 0 FLAG 464 448 vcc FLAG 464 592 0 FLAG 1056 960 0 FLAG 320 960 0 FLAG 864 416 out2 IOPIN 864 416 Out FLAG 896 1072 out1 IOPIN 896 1072 Out FLAG 464 352 0 FLAG 1008 352 0 SYMBOL Opamps\\LTC6101 736 944 R0 SYMATTR InstName U1 SYMBOL res 688 800 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName Rsense2 SYMATTR Value 0.05 SYMBOL res 688 192 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName Rsense SYMATTR Value 0.05 SYMBOL res 848 1088 R0 SYMATTR InstName Rm SYMATTR Value 2k SYMBOL voltage 1056 816 R0 SYMATTR InstName V1 SYMATTR Value 12 SYMBOL voltage 464 464 R0 SYMATTR InstName V2 SYMATTR Value 5 SYMBOL res 848 784 R0 SYMATTR InstName Rg SYMATTR Value 100 SYMBOL current 320 832 R0 WINDOW 123 0 0 Left 0 WINDOW 39 24 116 Left 0 SYMATTR SpiceLine load SYMATTR InstName I2 SYMATTR Value PULSE(1 2 0 1u 1u 1m 1) SYMBOL voltage 464 208 R0 SYMATTR InstName V3 SYMATTR Value 12 SYMBOL MAX4173T 736 336 R0 SYMATTR InstName U2 SYMBOL current 1008 224 R0 WINDOW 123 0 0 Left 0 WINDOW 39 24 116 Left 0 SYMATTR SpiceLine load SYMATTR InstName I3 SYMATTR Value PULSE(1 2 0 1u 1u 1m 1) TEXT 360 -280 Left 0 ;High Side Current Sense With MAX4173T And LTC6101\n \nMaxim models source: \nhttp://www.maxim-ic.com/tools/spice/current_sense_amps/macro/MAX4173T.FAM\nDon't connect pin GND2 to GND in the schematic because of a stupid voltage \nsource between GND1 and GND2 in the model. I wonder how such a nonsense \nin the model could pass any quality check at Maxim. TEXT 368 -56 Left 0 !.op TEXT 952 416 Left 0 ;Vout = I * Rsense * 20 TEXT 368 -24 Left 0 !.tran 2m TEXT 992 1072 Left 0 ;Vout = I * Rsense * Rm / Rg TEXT 736 88 Left 0 ;I TEXT 752 696 Left 0 ;I TEXT 368 8 Left 0 !.options plotwinsize=0 TEXT 640 520 Left 0 ;specific symbol TEXT 632 1136 Left 0 ;specific symbol LINE Normal 784 112 704 112 LINE Normal 768 96 784 112 LINE Normal 768 128 784 112 LINE Normal 784 720 704 720 LINE Normal 720 704 704 720 LINE Normal 720 736 704 720