INA326

• Gain calculation

• We select to have maximum combined gain of Instrumentation-Amp and MSP430: G=1000
• MSP430 has max Gain G1=32
• INA326 Gain G2 = 1000/32 => G2 = ~32
• G2 = 2(R2/R1) =>

G2*R1 = 2*R2 =>

G2*R1/2 = R2 OR

R2 = G2*R1/2

replacing with values:

R2 = 32*2KΩ/2 =>

R2 = 64KΩ/2 =>

R2 = 32KΩ =>

R2 =~33KΩ

For R1 = 2KΩ
G2 = R2 value expressed in KΩ
33KΩ -> G2 = 33
10KΩ -> G2 = 10....