DESCRIPTION
●The WM8731 or WM8731L (WM8731/L) are low power stereo CODECs with an integrated headphone driver. The WM8731/L is designed specifically for portable MP3 audio and speech players and recorders. The WM8731 is also ideal for MD, CD-RW machines and DAT recorders.
●FEATURES
●• Highly Efficient Headphone Driver
●•Audio Performance
●- ADC SNR 90dB (‘A’ weighted) at 3.3V, 85dB at 1.8V
●- DAC SNR 100dB (‘A’ weighted) at 3.3V, 95dB at 1.8V
●•Low Power
●- Playback only 22mW, 8mW (‘L’ Variant)
●- Analogue Pass Through 12mW, 3.5mW (‘L’ variant)
●- 1.42 – 3.6V Digital Supply Operation
●- 2.7 – 3.6V Analogue Supply Operation
●- 1.8 – 3.6V Analogue Supply Operation (‘L’ Variant)
●• ADC and DAC Sampling Frequency: 8kHz – 96kHz
●• Selectable ADC High Pass Filter
●• 2 or 3-Wire MPU Serial Control Interface
●• Programmable Audio Data Interface Modes
●\- I2S, Left, Right Justified or DSP
●- 16/20/24/32 bit Word Lengths
●- Master or Slave Clocking Mode
●• Microphone Input and Electret Bias with Side Tone Mixer
●• Available in 28-lead SSOP or 28-lead QFN package
●APPLICATIONS
●• Portable MP3 Players and Recorders
●• CD and Minidisc Recorders
●• PDAs / smartphones
