The WM8951L is designed as one kind of low power stereo ADC that can be used in (1)wireless microphones; (2)voice recorders; (3)games console accessories applications. This device is controlled via a 2 or 3 wire serial interface and is available in a small 28 lead 5x5mm quad flat leadless package (QFN). Features of the WM8951L are:(1)microphone input and electret bias with side tone mixer; (2)available in 5x5mm 28-pin QFN package; (3)sampling frequency: 8kHz to 96kHz; (4)selectable ADC high pass filter; (5)2 or 3-wire MPU serial control interface; (6)programmable audio data interface modes; (7)audio performance: ADC SNR 90dB (A weighted) at 3.3V, 85dB at 1.8V, low power, 1.42 to 3.6V digital supply operation and 1.8 to 3.6V analogue supply operation. The absolute maximum ratings of the WM8951L can be summarized as:(1)Digital supply voltage: -0.3 V to +3.63 V;(2)Analogue supply voltage: -0.3 V to +3.63 V;(3)Voltage range digital inputs: DGND-0.3V to DVDD+0.3V;(4)Voltage range analogue inputs: AGND1/2-0.3V to AVDD1/2+0.3V;(5)Operating temperature range: -25°C to +85°C.