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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 / 23 page  WM8722 Stereo DAC with Integrated Tone Generator and Line/Variable Level Outputs Advanced Information, May 2000, Rev 1.5 WOLFSON MICROELECTRONICS LTD Lutton Court, Bernard Terrace, Edinburgh, EH8 9NX, UK Tel: +44 (0) 131 667 9386 Fax: +44 (0) 131 667 5176 Email: sales@wolfson.co.uk http://www.wolfson.co.uk Advanced Information data sheets contain preliminary data on new products in the preproduction phase of development. Supplementary data will be published at a later date. 2000 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-board 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) − THD+N: -90dB @ F.S. − 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-board 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 (17) SERIAL INPUT INTERFACE BCKIN (19) LRCIN (18) SCKI (20) TONE GENERATOR MD (3) MC (2) LATCH (4) DIGITAL ATTENUATOR AND FILTERS MULTI BIT ∑∆ TONE DAC MULTI BIT SC DAC DIGITAL ATTENUATOR AND FILTERS MULTI BIT ∑∆ MULTI BIT SC DAC (7) MXINR MXINL(14) (13)LINEOUTL (12) VAROUTL +6 to -73dB, 1dB Steps (9) VAROUTR (8) LINEOUTR 0 TO -46.5dB, 1.5dB STEPS (15) CAP (11) AVDD (10) AGND (6) DGND + I2S/SDIF 16,18, 20 OR 24 BITS BUSY (5) TCLK (1) +12 to -34.5dB, 1.5dB Steps + + + WM8722 0/-6dB 0/-6dB 0/-6dB MONO ATTENUATION CONTROL 4 L Mix Switches (0-9) +12 TO -34.5dB, 1.5dB STEPS (16) DVDD 0/-6dB R Mix Switches (0-9) |
Número de pieza similar - WM8722 |
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Descripción similar - WM8722 |
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