The key to reducing the effects of the noise is to maximize the input signal level. What this means is that the HCI designer should increase the gain of the signal conditioning circuitry until the maximum sensor output is equal to the of the ADC. It is also possible to reduce down to the maximum level of the sensor. The problem with this is that the noise will corrupt the small signals. A good rule of thumb is to keep at least as large as the maximum digital signal, usually 5V.