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WM8722 Datasheet(PDF) 1 Page - Wolfson Microelectronics plc |
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WM8722 Datasheet(HTML) 1 Page - Wolfson Microelectronics plc |
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1 / 24 page  w w w w WM8722 Stereo DAC with Integrated Tone Generator and Line/Variable Level Outputs WOLFSON MICROELECTRONICS LTD w :: www.wolfsonmicro.com Advanced Information, June 2001, Rev 2.1 Copyright 2001 Wolfson Microelectronics Ltd. DESCRIPTION The WM8722 is a high performance stereo DAC designed for audio applications such as digital TV and set top boxes. The WM8722 has two stereo analogue outputs, one at line level and one that includes a digitally controllable mute and attenuator function. An on-chip tone generator can be routed through the line or variable outputs. WM8722 supports data input word lengths from 16-24 bits and sampling rates up to 96kHz. The WM8722 consists of a serial interface port, digital interpolation filter, multi-bit sigma delta modulator and stereo DAC in a small 20-pin SSOP package. The 3 or 2-wire serial MPU compatible control port provides access to all features including tone generation, on-chip mute, attenuation and phase reversal. The programmable data input port supports glueless interfaces to popular DSPs, audio decoders and S/PDIF and AES/EBU receivers. FEATURES • Performance − 102dB SNR (‘A’ weighted @48kHz) − -95dB THD − 5V or 3V supply operation − Sampling frequency: 8kHz – 96kHz • 3-wire or 2-wire serial MPU compatible interface for − Input data word; 16/20/24-Bit − Soft mute − De-emphasis − Volume control • On-chip tone generator (1Hz – 32kHz, 0.1 – 25.5s) • Stereo analogue inputs • 20-pin SSOP package APPLICATIONS • Digital TV • Digital broadcast receivers • Set top boxes BLOCK DIAGRAM DIN BCKIN LRCIN SCKI TONE GENERATOR MD MC LATCH DIGITAL ATTENUATOR AND FILTERS MULTI BIT ∑ ∑ ∑ ∑ ∆ ∆∆ ∆ TONE DAC MULTI BIT SC DAC DIGITAL ATTENUATOR AND FILTERS MULTI BIT ∑ ∑ ∑ ∑ ∆ ∆∆ ∆ MULTI BIT SC DAC MXINR MXINL LINEOUTL VAROUTL +6 to -73dB, 1dB Steps VAROUTR LINEOUTR 0 TO -46.5dB, 1.5dB STEPS CAP AVDD AGND DGND + BUSY TCLK +12 to -34.5dB, 1.5dB Steps + + + 0/-6dB 0/-6dB 0/-6dB MONO ATTENUATION CONTROL 4 L Mix Switches (0-9) +12 TO -34.5dB, 1.5dB STEPS DVDD 0/-6dB R Mix Switches (0-9) WM8722 SERIAL INTERFACE CONTROL INTERFACE |
Similar Part No. - WM8722_01 |
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Similar Description - WM8722_01 |
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