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WM8816 Dataheets PDF



Part Number WM8816
Manufacturers Wolfson Microelectronics plc
Logo Wolfson Microelectronics plc
Description Stereo Digital Volume Control
Datasheet WM8816 DatasheetWM8816 Datasheet (PDF)

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 de.

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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. WM8816 Stereo Digital Volume Control Advanced Information, September 2000, Rev 1.1 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 LIN (4) LGND (5) Zero Crossing Detector Peak Level Detector (3) LFO (2) LMO + LEFT OUT CSB (6) MUTEB (8) DATA (9) CCLK (10) WM8816 Control DAC External Opamps RGND (12) RIN (13) Zero Crossing Detector Peak Level Detector (15) RMO + - (14) RFO RIGHT OUT (1) AVDD (16) AGND (7) DVDD WOLFSON MICROELECTRONICS LTD Lutton Court, Bernard Terrace, Edinburgh, EH8 9NX, UK Tel: +44 (0) 131 667 9386 Fax: +44 (0) 131 667 5176 Email: [email protected] http://www.wolfson.co.uk (11) DGND 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. WM8816 PIN CONFIGURATION AVDD LMO LFO LIN LGND CSB DVDD MUTEB 1 2 3 4 5 6 7 8 16 AGND 15 RMO 14 RFO 13 RIN 12 RGND 11 DGND 10 CCLK 9 DATA Advanced Information ORDERING INFORMATION DEVICE XWM8816EDW TEMP. RANGE -40 to +85oC PACKAGE 16-pin SOIC (plastic) PIN DESCRIPTION PIN NAME TYPE DESCRIPTION 1 AVDD Supply Supply Voltage for Analogue Circuitry 2 LMO Analogue Output External Op-amp Inverting Input (Left Channel) 3 LFO Analogue Input External Op-amp Feedback Signal (Left Channel) 4 LIN Analogue Input Input Signal (Left Channel) 5 LGND Analogue Input Input Signal Ground (Left Channel) 6 CSB Digital Input Chip Select (active low) 7 DVDD Supply Supply Voltage for Digital Circuitry 8 MUTEB Digital Input Mute (active low) 9 DATA Digital In / Out Serial Interface Data Input / Output (tri-state) 10 CCLK Digital Input Serial Interface Clock 11 DGND Supply Digital Ground 12 RGND Analogue Input Input Signal Ground (Right Channel) 13 RIN Analogue Input Input Signal (Right Channel) 14 RFO Analogue Input External Op-amp Feedback Signal (Right Channel) 15 RMO Analogue Output External Op-amp Inverting Input (Right Channel) 16 AGND Supply Analogue Ground WOLFSON MICROELECTRONICS LTD AI Rev 1.1 September 2000 2 Advanced Information WM8816 ABSOLUTE MAXIMUM RATINGS Absolute Maximum Ratings are stress ratings only. Permanent damage to the device may be caused by continuously operating at or beyond these limits. Device functional operating limits and guaranteed performance specifications are given under Electrical Characteristics at the test conditions specified. ESD Sensitive Device. This device is manufactured on a CMOS process. It is therefore susceptible to damage from excessive static voltages. To optimise the distortion and noise performance of pins 3, 4, 13 and 14, the on-chip ESD protection circuitry has been restricted, and consequently only achieves 300V when characterised to the Human Body Model. Proper ESD precautions must be taken during handling and storage of this device. As per JEDEC specification JESD22-A112-A, this product requires specific storage conditions prior to surface mount assembly. It has been classified as having a Moisture Sensitivity Level of 3 and is therefore supplied in vacuum-sealed moisture barrier bags. CONDITION Input signal voltage Positive supply voltage (AVDD to AGND, DVDD to DGND) Input voltage (all other pins) Operating temperature Storage temperature MIN -20V -0.5V -0.5V -40°C -55°C MAX +20V 6V AVDD + 0.5V 85°C 125°C RECOMMENDED OPERATING CONDITIONS PARAMETER Input signal voltage Positive supply voltage Negative supply voltage Input signal grounds Operating temperature SYMBOL TEST CONDITIONS MIN TYP MAX UNIT AVDD, DVDD AGND, DGND LGND, RGND -18 +18 V 4.5 5 5.5 V 0V 0V -20 60 60 °C ELECTRICAL CHARACTERISTICS TEST CONDITIONS AVDD = 5.0V, AGND = 0V, TA = 25°C, unless otherwise stated. PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Analogue Inputs / Outp.


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