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WM8816 Datasheet(PDF) 1 Page - Wolfson Microelectronics plc |
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WM8816 Datasheet(HTML) 1 Page - Wolfson Microelectronics plc |
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1 / 12 page  WM8816 Stereo Digital Volume Control Advanced Information, September 2000, Rev 1.1 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 pre-production phase of development. Supplementary data will be published at a later date. 2000 Wolfson Microelectronics Ltd . DESCRIPTION The WM8816 is a highly linear stereo volume control for audio systems. The design is based on resistor chains with external op-amps, which provides flexibility for the supply voltage, signal swing, noise floor and cost optimisation. The gain of each channel can be independently programmed from -111.5dB to +15.5dB through a digital serial control interface. Audible clicks on gain changes are eliminated by changing gains only when a zero crossing has been detected in the signal. The device also features peak level detection, which can be used for Automatic Gain Control. The WM8816 operates from a single +5V supply and accepts signal input levels up to ±18V. The WM8816 is available in a 16-pin SOIC package. It is guaranteed over a temperature range of -40 ° to 85°C. FEATURES • Gain range from -111.5dB to +15.5dB • 0.5dB Gain step size • Total Harmonic Distortion 0.001% (100dB) typical • Crosstalk -110dB typical • Input signals up to ±18V • Zero Detection for Gain Changes • Hardware and Software Mute • Power On/Off Transient Suppression APPLICATIONS • Audio Amplifiers • Consumer Audio / Entertainment Systems • Mixing Desks • Audio Recording Equipment BLOCK DIAGRAM Zero Crossing Detector Zero Crossing Detector Peak Level Detector Peak Level Detector CSB (6) MUTEB (8) DATA (9) CCLK (10) LGND (5) LIN (4) DAC (3) LFO (2) LMO RIN (13) RGND (12) (14) RFO (15) RMO (1) AVDD (16) AGND (7) DVDD (11) DGND + - + - LEFT OUT RIGHT OUT External Opamps Control WM8816 |
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