Data converters are the interface between the analog and digital domains. They convert analog signals to digital signals, and vice versa. Systems typically have interfaces to the real-world in an analog form. For instance, there can be a temperature input, or a sound output. The only way for a DSP or a microcontroller to work with these signals is to first convert them into the digital domain and then convert them back to the analog domain. Thus, there is a strong need for data converters. Typically, data converters receive analog inputs from a sensor after some form of signal conditioning and then feed digital signals to a DSP or microcontroller. Data converters also accept digital signals from a DSP or microcontroller to produce analog signals for an amplifier or some sort of output device, such as a speaker.