FEATURES

• Audio Performance 
• ADC SNR 90dB (’A’ weighted) at 3.3V, 85dB at 1.8V
• Low Power
• 1.42 - 3.6V Digital Supply Operation
• 1.8 - 3.6V Analogue Supply Operation
• 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 5x5mm 28-pin QFN package

The WM8951L is a low power stereo ADC with an integrated microphone interface and crystal oscillator for clock generation. The WM8951L is ideal for voice recorders, wireless microphones and games console accessories.

Stereo line and mono microphone level audio inputs are provided, along with a mute function, programmable line level volume control and a bias voltage output suitable for an electret type microphone.

Stereo 24-bit multi-bit sigma delta ADCs are used with oversampling decimation filters. Digital audio input word lengths from 16-32 bits and sampling rates from 8kHz to 96kHz are supported.

The device is controlled via a 2 or 3 wire serial interface. The interface provides access to all features including volume controls, mutes and extensive power management facilities. The device is available in a small 28 lead 5x5mm quad flat leadless package (QFN).