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LT6106 for High and Low current

Category: Hardware
Software Version: 17.1.8

I am using LTSpice 17.1.8 to work on a design for LT6106 with a P-CH switch to enable High/Low current measurement.

Low Current is 8uA to 200uA.  High is 3mA to 400mA.

Output of each is 0..2.5VDC in to 10K load.

The lower range does not seam to work.   Calculated Values:

Current RSense Vsense Rin Rout Vout Cout V10K Circuit VDC
0.000008 1000 0.008 499 11000 0.176353 1.60321E-05 0.160321 1.38
0.00001 1000 0.01 499 11000 0.220441 2.00401E-05 0.200401  
0.000015 1000 0.015 499 11000 0.330661 3.00601E-05 0.300601 1.49
0.00002 1000 0.02 499 11000 0.440882 4.00802E-05 0.400802 1.58
0.000025 1000 0.025 499 11000 0.551102 5.01002E-05 0.501002  
0.00003 1000 0.03 499 11000 0.661323 6.01202E-05 0.601202 1.77

The simulation is not even close.

When the P-CH is off the Low Current is being measured.

Also the real circuit VDC does not get the calculated values.

High Current seams to be working in LTSpice.



Moved and added product number.
[edited by: emassa at 7:52 PM (GMT -4) on 16 May 2023]