portable digital audio solutions ------------------------------------------------------------------------------------ WM8711 WM8721 WM8731 www.wolfsonmicro.com AUDIO DACs AND CODECS FOR BATTERY-POWERED APPLICATIONS productbenefits ------------------------------------------------------------------------------------------------Wolfson’s new family of audio ICs for portable applications offers highly integrated, DSP independent solutions that deliver CD quality sound at very low power consumption. The family includes a full audio codec, WM8731, and two DACs, WM8711 and WM8721. All three devices incorporate a powerful headphone amplifier whose output volume can be digitally controlled. Each IC is available as a standard or low voltage part, operating at supply voltages down to 1.42V (digital) and 1.8V (analogue). Using a unique USB clocking scheme, these ICs can generate 44.1kHz, 48kHz, 96kHz and other commonly used sample rates directly from a 12 or 24MHz clock, eliminating the need for a PLL in applications such as MP3 players. The WM8711 and WM8731 are pin-compatible and feature an on-chip clock oscillator to supply the system clock. Wolfson’s portable audio ICs have a very flexible audio interface which can interface to any industry standard DSP or other digital audio chip, thereby providing designers with a higher degree of flexibility. long battery life cd sound quality powerful headphone amplifier highly integrated solution dsp independent ----------------------------------------------------------------------------------------------------------------------------------------------------- ----------------------------------------------------------------------------------------------------------------------------------------------------device WM8721 WM8721L WM8711 WM8711L WM8731 WM8731L device type digital supply voltage analogue supply voltage analogue line-in microphone input on-chip clock generator package dac 1.42V – 3.6V 2.7V – 3.6V no no no 20-pin SSOP dac (low voltage) 1.42V – 3.6V 1.8V – 3.6V no no no 20-pin SSOP dac 1.42V – 3.6V 2.7V – 3.6V yes no yes 28-pin SSOP dac (low voltage) 1.42V – 3.6V 1.8V – 3.6V yes no yes 28-pin SSOP codec 1.42V – 3.6V 2.7V – 3.6V yes yes yes 28-pin SSOP codec (low voltage) 1.42V – 3.6V 1.8V – 3.6V yes yes yes 28-pin SSOP wolfson microelectronics :: leading world experts in the design of signal processing electronics_ portable digital audio solutions ------------------------------------------------------------------------------------ WM8711 WM8721 WM8731 www.wolfsonmicro.com productfeatures -----------------------------------------------------------------------> cd quality audio performance » dac 100dB snr, 88dB thd (‘A’ weighted @ 48kHz) » adc 97dB snr, 85dB thd (WM8731 only) usb headsets mobile phones with mp3 > independent stereo line and headphone outputs » headphone output power: 40mW on 16Ω load » volume and mute controls > low supply voltage » 1.42 – 3.6V digital supply » 1.8 – 3.6V analogue supply for low-voltage parts » 2.7 – 3.6V analogue supply for standard parts palm tops / web browsers mobile information devices > very low power » playback only: 9mW @ 1.8V, 18mW @ 3.3V » simultaneous playback & record: 18mW @ 1.8V, 36mW @ 3.3V » standby: 30µW > programmable sample rates :: 8, 32, 44.1, 48, 88.2, 96kHz > on-chip clock generator (WM8711 and WM8731 only) mp3 players / recorders > programmable audio data interface » i2s, left/right justified or dsp modes » 16/20/24/32-bit word lengths » master or slave clocking mode digital camcorders > 2 or 3-wire serial control interface digital still cameras > temperature range :: –10°C to +70°C part number voltage supply standard pack quantity package WM8711EDS WM8711LEDS WM8721EDS WM8721LEDS WM8731EDS WM8731LEDS standard low standard low standard low 47 47 66 66 47 47 SSOP-28 SSOP-28 SSOP-20 SSOP-20 SSOP-28 SSOP-28 productapplications > > > > > > > mp3 players and recorders mobile information devices palmtops web browsers mobile phones with mp3 digital camcorders and cameras usb headsets >> all battery powered systems incorporating digital audio wolfson microelectronics :: direct sales offices WORLD Headquarters USA Sales Office ASIA PACIFIC Sales Office Wolfson Microelectronics Ltd Bernard Terrace Edinburgh EH8 9NX UK Wolfson Microelectronics Ltd 111 North Market Street Suite 670 San Jose CA 95113 USA Wolfson Microelectronics Ltd 9F-1 No 6 Lane 180 Min-Chiuan East Road Sec 6 Taipei Taiwan RoC Tel: +44 131 667 9386 Fax: +44 131 667 5176 Tel: +1 408 279 2882 Fax: +1 250 746 4186 Tel: +886 2 2792 5775 Fax: +886 2 8791 8590 © Copyright 2001, Wolfson Microelectronics Ltd. Wolfson and are registered trademarks of Wolfson Microelectronics Ltd. All other trademarked names are the property of their respective owners. PF8731F-01/2001 orderinginformation ------------------------------------------------------------------------