ICs for Audio Common Use AN7395K, AN7395S Spatializer IC ■ Overview AN7395K 20 10 11 0.5±0.1 0.9±0.25 1 1.778 ■ Features • Profound three-dimensional spatial sound with conventional two-speaker system • Audio signal recorded through this IC reproducible by ordinary stereo unit • Optimization of enhancement effect • Sound expansion variably controllable • Pseudo stereo effect with monaural sound signal • Positioning/Shift of individual sound source along 270 degrees arc in real time Unit : mm 19.1±0.3 AN7395K and AN7395S developed for the consumer electronics and multimedia markets, the Spatializer integrated circuit is based on Desper Prodcts multi-channel PRO Spatializer ® 3D Audio Production System. The AN7395K and AN7395S make use of this innovative technology to enhance and expand the sound from conventional two-speaker systems. 1.1±0.25 6.35±0.3 3.45±0.25 4.5±0.25 + 0.1 5 – 0.0 0.35 3 ~ 15˚ 7.62±0.25 20-Lead SDIP Package (SDIP020-P-0300A) Unit : mm 1 20 10 11 0.3 5.4±0.3 7.7±0.3 1.5±0.2 0.15 0.65 0.1±0.1 1.27 12.6±0.3 0.4±0.25 0.4 AN7395S ■ Application • Computer sound board • Active speaker system • Multi-media equipment for home • Desk-top type TV meeting unit • HiFi unit (amp., preamp.) • Stereo TV and video • Portable audio equipment • Car audio • Converter for cable or satellite broadcasting • Video game for home and business 20-Lead SOP Package (SOP020-P-0300A) ICs for Audio Common Use AN7395K, AN7395S ■ Application Circuit 27nF + 6.0 ~+10.0 VDC + + 10µF 10µF 1MΩ 39nF 10nF 18 16 15 12 6 11 10 F1 F2 NC VCC SET TIM2 TIM1 22µF 100µF Left channel output + + Left Channel Input 9 LRET LOUT 3 1 LIN 100µF SOUT 4 22µF + Right Channel Input Surround output + AN7395S 100µF 19 RIN ROUT 5 VREG GND Mode GND VREF RRET 13 17 20 14 8 2 7 Right channel output + ((Space)) 100µF 10kΩVR 150kΩ + 22µF + 56nF + to VCC + 1µF Changeover 0 to 0.9V : OFF mode 2.1 to 2.8V : STEREO mode 4.2 to VCC : MONAURAL mode ■ Product Specification Outline Table Main Characteristics (VCC = 9V, f = 1kHz, Ta = 25˚C) Parameter Total Circuit Current Maximum Input Voltage Output Noise Voltage Note 1) Total Harmonics Distortion Note 2) Input Resistance Symbol Itot Vin (max.) Vno THD Condition Vin= 0mV Lin, Rin THD = 1% Note 3) Lout, Rout Rg = 4.7kΩ Note 4) Lout, Rout Vin = 400mV Note 3) RIN min. typ. 5 11 2.0 2.8 max. 17 mA Vrms 20 100 0.05 0.3 50 Unit µVrms % kΩ Note 1) Measured through filter of A characteristic curve Note 2) Measured through 15Hz to 30kHz (12dB/OCT) filter Note 3) Mode : ST Lin + Rin ((Space)) MIN Note 4) Mode : ST ((Space)) MIN ■ Operational Description The AN7395K and AN7395S are respectively equipped with the following devices : • Type E Spatializer (Spatial Expansion) It uses the ordinary stereo record and broadcasting as a sound source and can offer sound expansion exceeding speaker location. provides natural sound effect which can not be obtained only with conventional two-speaker stereo system. Sound image positioned at the center does not move at all, and music instruments and sound positioned to left and right surround listeners. The surround stage can be created, exceeding location of two speakers. Real three-dimensional sound field can be created by ambience sound. Listeners feel as if no speakers exist. →It • Type D Spatializer (Directional Positioning) It can position or shift the individual sound source along 270˚ arc in real time for example at game play or reproduction. →The AN7395K and AN7395S can support almost infinitive number of inputs. They require only the function panning these signals between L and R. These ICs can be easily incorporated in the video game machine or sound board of computer and thereby the sound source can be controlled in three dimensions without DSP. • Type S Spatializer (Spatial Synthesis) Though almost all the sound of computer, video game or multi-media uses mono-source, playback is often performed by the stereo unit. The spatializer can give the mono-source profoundness and realism, providing the natural and comfortable pseudo stereo effect. ICs for Audio Common Use AN7395K, AN7395S ■ Miscellaneous When users use these products, licensing contract should be made with the Desper Products, Inc. For details, refer to the following : JAPAN OFFICE Desper Products Inc. Tokyo Office USA OFFICE Desper Products Inc. SilliconValley Offices Mr. Masaya Ishikawa Far East Manager Mr. Mark Markunas OEM Accouunt Manager 1-15-4-201 Sasazuka, Shibuya-ku, Tokyo, 151-0073 Japan TEL : +81-3-5454-1140 FAX : +81-3-5790-5394 E-mail : [email protected] 453Ranvendale Drive, Suite C Mountain view, CA 94118 TEL : (415)428-0400Ext207 FAX : (415)428-1064 E-mail : [email protected] * Spatializer®and are the trademarks of Desper Products Inc. ■ Printed Circuit Board Layout 10kΩ VR SPATIALIZER® Audio Processor EMR 4.0 (AN7395S) Rin 22µF 1µF 22µF 150kΩ Lin 27nF 22µF 10nF 1µF Rout 10µF Lout 100µF 10µF 100µF 100µF 39nF 56nF 10µF 1MΩ Sout VCC 100µF 100µF