Difference between revisions of "INA326"
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Latest revision as of 16:51, 11 September 2015
- 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....