There are a number of challenges that designers of heart monitoring equipment need to meet. One key area is the ability of systems to meet clinical standards, even if they are being used in consumer applications. Noise performance of the front end is also a critical requirement since the signals that are being captured are in a very noisy environment and are low when compared to the noise level. Low noise helps the sensor capture and translate the waveforms. The devices where this sensor is used often have a small form factor, so integration of multiple functions is also critical to meet the space requirements. Finally, a long battery life is needed since many of these products have to have 7, 14, or 21 days on the body.