In summary, instrumentation amplifiers are one of the least complicated components on a typical circuit board. Because of their ease of use, the external circuitry needed for optimum performance is often overlooked. With a little thought, the full performance of the instrumentation amplifier can be realized through careful consideration of the bias current return path, driving the reference pin, input voltages near the supply rails, input voltages beyond the supply rails, potential radio frequency interference, and ensuring there are no mismatched components at inputs.