Wolfson Microelectronics plc: Products : CODECs

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WM9711

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Low Power Audio Codec for Portable Applications
FEATURES AC’97 Rev 2.2 compatible stereo codec DAC SNR 94dB, THD –87dB ADC SNR 92dB, THD –87dB Variable Rate Audio, supports all WinCE sample rates Tone Control, Bass Boost and 3D Enhancement On-chip 45mW headphone driver On-chip 400mW mono speaker driver Stereo, mono or differential microphone input Automatic Level Control (ALC) Auxiliary mono DAC (ring tone or DC level generation) Seamless interface to wireless chipset Up to 5 GPIO pins 2 comparator inputs for battery monitoring 1.8V to 3.6V supplies 7x7mm QFN	DESCRIPTION The WM9711L is a highly integrated input / output device designed for mobile computing and communications. The device can connect directly to mono or stereo microphones, stereo headphones and a mono speaker, reducing total component count in the system. Additionally, phone input and output pins are provided for seamless integration with wireless communication devices. The WM9711L also offers five GPIO pins for interfacing to buttons or other digital devices. To monitor the battery voltage in portable systems, the WM9711L has two uncommitted comparator inputs. All device functions are accessed and controlled through a single AC-Link interface compliant with the AC’97 standard. Additionally, the WM9711L can generate interrupts to indicate low battery, dead battery, thermal cut-out and GPIO conditions. The WM9711L operates at supply voltages from 1.8 to 3.6 Volts. Each section of the chip can be powered down under software control to save power. The device is available in a small leadless 7x7mm QFN package, ideal for use in hand-held portable systems.