The transfer function of V_OUT– is heavily reliant on resistors (R₁, R₂, R₃, and R₄), therefore TI recommends to use resistors with low tolerances to maximize performance and minimize error. This design uses resistors with resistance values of
36kΩ with tolerances measured to be within 2% of these resistor values. If the noise of the system is a key parameter, the user can select smaller resistance values (6kΩ or lower) to keep the overall system noise low and the noise from the resistors lower than the amplifier noise.