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WM8731SEDS/R 数据表(PDF) 1 Page - Wolfson Microelectronics plc |
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WM8731SEDS/R 数据表(HTML) 1 Page - Wolfson Microelectronics plc |
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1 / 63 page  w WM8731 / WM8731L Portable Internet Audio CODEC with Headphone Driver and Programmable Sample Rates WOLFSON MICROELECTRONICS plc To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews/ Production Data, August 2006, Rev 4.3 Copyright ©2006 Wolfson Microelectronics plc 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. 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 and DACs are used with oversampling digital interpolation and decimation filters. Digital audio input word lengths from 16-32 bits and sampling rates from 8kHz to 96kHz are supported. Stereo audio outputs are buffered for driving headphones from a programmable volume control, line level outputs are also provided along with anti-thump mute and power up/down circuitry. The device is controlled via a 2 or 3 wire serial interface. The interface provides access to all features including volume controls, mutes, de-emphasis and extensive power management facilities. The device is available in a small 28- lead SSOP package or the smaller 28 lead quad flat leadless package (QFN). 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 - I 2S, 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 BLOCK DIAGRAM MUX MUX VOL VOL ADC ADC DIGITAL FILTERS DIGTAL AUDIO INTERFACE CONTROL INTERFACE DAC DAC VOL/ MUTE VOL/ MUTE H/P DRIVER H/P DRIVER Σ Σ RHPOUT LHPOUT ROUT LOUT RLINEIN LLINEIN VMID AVDD AGND 0dB/ 20dB MICIN +12 to -34.5dB, 1.5dB Steps +6 to -73dB 1 dB Steps HPVDD HPGND +6 to -73dB 1 dB Steps OSC MICBIAS MUTE Bypass Bypass CLKIN DIVIDER (Div x1, x2) CLKOUT DIVIDER (Div x1, x2) ATTEN/ MUTE MUTE MUTE ATTEN/ MUTE MUTE MUTE MUTE MUTE MUTE +12 to -34.5dB, 1.5dB Steps Side Tone Side Tone W WM8731 |
类似零件编号 - WM8731SEDS/R |
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类似说明 - WM8731SEDS/R |
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