LT1991 Applied Through a Dual 4:1 MUX as an Individual Battery Cell Monitor for a 4-Cell Battery

LT1991 Applied Through a Dual 4:1 MUX as an Individual Battery Cell Monitor for a 4-Cell Battery. The Circuit shows the LT1991 configured as a difference amplifier in a gain of 3, applied across the individual cells of a battery through a dual 4:1 mux