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5. PHYSICAL INTERFACE

5.1

Power Supply

The transient response of the regulator is important. If the power rails of the module are

supplied from an external voltage source, the transient response of any regulator used

should be 20µs or less.

5.2

Audio Interfaces

Audio interface as following features:

Mono analogue input for voice band and audio band

Stereo and mono analogue output for voice band and audio band

The stereo audio CODEC uses a fully differential architecture in the analogue signal path,

which results in low noise sensitivity and good power supply rejection while effectively

doubling the signal amplitude. It uses a minimum of external components. The module

features a differential stereo audio output interfaces.

5.2.1

ADC

Figure 6