* Z:\home\khalils\Downloads\files\data\raw_asc\LTC6561.asc
* Generated by LTspice 26.0.1 for Windows.
* Current Inputs from Avalance Photodiodes\nTop instance In1 selected \nBottom instance In4 selected
* Library below included based on ModelFile attribute of instance XU2, XU1 (C:\users\khalils\AppData\Local\LTspice\lib\sym\OpAmps\LTC6561.asy)
A1 N008 0 0 0 0 N009 N007 0 BUF Ref=.5 Trise=1n Vlow=0 Vhigh=5
C2 N004 0 1
C1 N002 0 1
C3 N005 0 1
V4 N008 0 PWL(0 0 50n 0 +.1n 1)
C6 N010 0 1
R3 OUT 0 50
C7 N011 0 1
C5 IN1 0 4p
V1 N001 0 5
I4 IN2 0 PULSE(0 20u 100n .1n .1n 6.5n 300n)
C9 N013 0 1
C4 N006 0 1
C8 N012 0 1
R2 OUT N003 50
I3 IN1 0 PULSE(0 30u 1.5n .1n .1n 6.5n 300n)
XU2 N001 N001 N001 N010 N011 N012 N013 0 NC_01 NC_02 NC_03 IN2 N009 N001 N003 NC_04 LTC6561 ;pnba Vcco)chsel0)Vcc)Vref1)Vref2)Vref3)Vref4)Gnd)In1)In2)In3)In4)O_Mux)chsel1)Out)OutTerm
XU1 N001 0 N001 N002 N004 N005 N006 0 IN1 NC_05 NC_06 NC_07 N007 0 N003 NC_08 LTC6561 ;pnba Vcco)chsel0)Vcc)Vref1)Vref2)Vref3)Vref4)Gnd)In1)In2)In3)In4)O_Mux)chsel1)Out)OutTerm
C10 IN2 0 4p
.tran 200n
.lib LTC7.lib
.backanno
.end

* LTspice schematic (.asc):
Version 4
SHEET 1 2212 2336
WIRE 496 -96 208 -96
WIRE 624 -96 496 -96
WIRE 688 -96 624 -96
WIRE 688 -80 688 -96
WIRE 208 -64 208 -96
WIRE 496 -64 496 -96
WIRE -112 -16 -688 -16
WIRE 96 -16 -112 -16
WIRE -688 0 -688 -16
WIRE -112 0 -112 -16
WIRE 688 16 688 0
WIRE 0 64 -16 64
WIRE 96 64 64 64
WIRE -112 80 -112 64
WIRE -688 96 -688 80
WIRE 688 144 592 144
WIRE 720 144 688 144
WIRE 864 144 800 144
WIRE 864 160 864 144
WIRE 0 224 -16 224
WIRE 96 224 64 224
WIRE 864 256 864 240
WIRE 0 384 -16 384
WIRE 96 384 64 384
WIRE 0 544 -16 544
WIRE 96 544 64 544
WIRE 208 624 208 608
WIRE 304 624 304 608
WIRE 400 624 400 608
WIRE 496 704 496 608
WIRE 496 704 64 704
WIRE -208 720 -256 720
WIRE 0 720 -128 720
WIRE 656 736 64 736
WIRE 0 784 0 752
WIRE 496 832 208 832
WIRE 624 832 624 -96
WIRE 624 832 496 832
WIRE 208 848 208 832
WIRE 496 848 496 832
WIRE 0 976 -16 976
WIRE 96 976 64 976
WIRE 688 1056 688 144
WIRE 688 1056 592 1056
WIRE 0 1136 -16 1136
WIRE 96 1136 64 1136
WIRE 0 1296 -16 1296
WIRE 96 1296 64 1296
WIRE -96 1376 -640 1376
WIRE 96 1376 -96 1376
WIRE -640 1392 -640 1376
WIRE -96 1392 -96 1376
WIRE 0 1456 -16 1456
WIRE 96 1456 64 1456
WIRE -96 1472 -96 1456
WIRE -640 1488 -640 1472
WIRE 208 1536 208 1520
WIRE 304 1536 304 1520
WIRE 400 1536 400 1520
WIRE 400 1536 304 1536
WIRE 624 1536 624 832
WIRE 624 1536 400 1536
WIRE 496 1568 496 1520
WIRE 656 1568 656 736
WIRE 656 1568 496 1568
SYMBOL current -688 0 R0
WINDOW 123 24 122 Left 2
WINDOW 39 24 101 Left 2
SYMATTR Value PULSE(0 30u 1.5n .1n .1n 6.5n 300n)
SYMATTR InstName I3
SYMBOL voltage -112 720 R90
WINDOW 123 74 56 VTop 2
WINDOW 39 53 56 VTop 2
WINDOW 0 -32 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName V4
SYMATTR Value PWL(0 0 50n 0 +.1n 1)
SYMBOL LTC6561 352 1152 R0
SYMATTR InstName U2
SYMBOL res 816 128 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 50
SYMBOL cap 64 368 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value 1
SYMBOL cap 64 1280 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C8
SYMATTR Value 1
SYMBOL cap 64 528 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C4
SYMATTR Value 1
SYMBOL res 848 144 R0
SYMATTR InstName R3
SYMATTR Value 50
SYMBOL LTC6561 352 240 R0
SYMATTR InstName U1
SYMBOL cap -128 0 R0
SYMATTR InstName C5
SYMATTR Value 4p
SYMBOL cap 64 48 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 1
SYMBOL cap 64 1120 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C7
SYMATTR Value 1
SYMBOL cap -112 1392 R0
SYMATTR InstName C10
SYMATTR Value 4p
SYMBOL cap 64 1440 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C9
SYMATTR Value 1
SYMBOL cap 64 208 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 1
SYMBOL voltage 688 -96 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL digital\\buf 0 656 R0
WINDOW 3 60 96 Left 2
WINDOW 123 49 118 Left 2
WINDOW 40 25 139 Left 2
SYMATTR Value Ref=.5
SYMATTR Value2 Trise=1n
SYMATTR SpiceLine2 Vlow=0 Vhigh=5
SYMATTR InstName A1
SYMBOL current -640 1392 R0
WINDOW 123 24 122 Left 2
WINDOW 39 24 101 Left 2
SYMATTR Value PULSE(0 20u 100n .1n .1n 6.5n 300n)
SYMATTR InstName I4
SYMBOL cap 64 960 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C6
SYMATTR Value 1
FLAG -640 1376 IN2
FLAG -96 1472 0
FLAG 208 624 0
FLAG 688 16 0
FLAG -16 64 0
FLAG -16 224 0
FLAG -16 384 0
FLAG -16 544 0
FLAG 304 624 0
FLAG 400 624 0
FLAG 864 144 OUT
FLAG -688 -16 IN1
FLAG -112 80 0
FLAG 0 784 0
FLAG -256 720 0
FLAG -688 96 0
FLAG -640 1488 0
FLAG 208 1536 0
FLAG 864 256 0
FLAG -16 976 0
FLAG -16 1136 0
FLAG -16 1296 0
FLAG -16 1456 0
TEXT 776 1504 Left 2 !.tran 200n
TEXT -16 -72 Bottom 2 ;Current Inputs from Avalance Photodiodes\nTop instance In1 selected \nBottom instance In4 selected