WM8731CSEFL/R

The WM8731CSEFL/R is an example of a CODEC interface which is used in multiple application fields, virtually any device or system in which conversion from digital to analog or vice versa is needed. It features a mono linear input for audio, like rhythm machine and digital mixer, allowing for lossless digital audio data. The WM8731CSEFL/R CODECs also enable low power consumption capabilities, with low distortion and low noise performance – making it suitable for advanced audio performance.

The WM8731CSEFL/R CODECs comprise stereo audio analog-to-digital converter and digital-to-analog converter. Other components include integrated program-controlled gain amplifier, headphone driver, and analog interface step-down voltage regulator, making it an all-in-one solution for many audio projects. It allows for playing high quality audio file formats with up to 24-bit resolution, supporting sampling rate of up to 192kHz. The power supply for the WM8731CSEFL/R is in 5-3V range and the power consumption is maximum at 300mA.

The WM8731CSEFL/R works thanks to differential analog inputs and outputs. The analog inputs are AC-coupled, while the DAC output is DC-coupled, meaning that both analog and digital control are needed. The analog inputs are valid over the input range 0 dB- –60 dB, while the DAC output range is 0 dB- -100 dB. The WM8731CSEFL/R also contains an integrated headphone driver and analog microphone bias for use in headsets.

The gain register of the device allows for analog audio signal attenuation from 0 dB to -59 dB in 0.75 dB steps. On the other hand, the WM8731CSEFL/R features programmable digital volume control with step size from 0 dB to -103 dB in 0.5 dB steps. The hybrid digital and analog MUX allows for input selection between ADCs, DACs and microphones for much more versatility in audio system design.

The WM8731CSEFL/R includes an integrated headphone driver, supplied with two low pass filters which enable low cutoff frequency of 100Hz and 20Hz respectively. This allows for both speaker output and headphone output simultaneously, providing much improved audio listening experiences. Furthermore, the device also incorporates an analog microphone bias circuit, enabling headset to connect with the headphones’ mics.

The application of the WM8731CSEFL/R ranges far and wide, as many systems and devices benefit from it. It is used in MP3 players, car audio systems, home theater systems, portable media players, digital cameras, medical devices and many more. With its wide range of features and small size, this CODEC will continue to be employed in various applications, providing audio solutions for many different products.