nonolith/CEE — Issue #27: Redesign Analog Frontend
Author: itdaniher
Created: 2012-01-04 20:09:39+00:00
State: open

Use a single AD8608 quad opamp as four well-matched unity gain buffers to buffer OUT-A, OUT-B, SMU-A, SMU-B, both channels before and after the current sense resistors.

Use two channels of a second AD8608 as a single-pole antialiasing filter, complete with a 1/2 voltage divider.

Use the other two channels of a second AD8608 as a difference amplifier, likely with gain 100 given by 1M and 10K resistor arrays.

May need loop compensation capacitor for difference in gain bandwidth / freq response between AD8608 and OPA567s.