ICs for Audio Common Use AN7397K, AN7397S Spatializer IC for I2C bus ■ Overview AN7397K Unit: mm 19.1±0.3 20 11 1 10 0.5±0.1 0.90±0.25 ■ Features Seating plane 1.10±0.25 3.45±0.25 1.778 4.50±0.25 6.35±0.30 Spatializer Audio Processor is a signal processing technology, monopolized by Desper Products, Inc., that was developed for commercial electronics and multimedia markets, and is based on Desper's “PRO Spatializer” that is a 3-D audio production system for business use. The AN7397K, AN7397S utilizes the innovative technology adopted in that system, and provides sound enhancement effect and sound expansion with the conventional 2-speaker stereo system. 7.62±0.25 15° 3° to +0.10 0.35 – 0.05 SDIP020-P-0300 • Provides deep 3-D sound with conventional 2speaker system. • The audio signal recorded through this IC can be reproduced with usual stereo system. • Performs optimal processing to the sound source recorded with surround-effect so as not to give double effects. • Sound localization can be varied. • A pseudo stereo effect for the monaural audio signal is achieved. • Positions and moves each sound source on 270° arc in real time. • An on-chip serial control bus (i.e., I2C) to vary space-effect and change modes. AN7397S Unit: mm 12.6±0.3 11 1 10 0.15 5.4±0.3 7.7±0.3 20 1.27 (0.60) 0.40±0.25 Seating plane 0.65 0.1±0.1 1.5±0.2 0.3 0° to 10° Seating plane SOP020-P-0300B ■ Applications • Televisions, videos, audio equipment, DVDs, personal computers, and game machines SDA 11 SCL 10 R-det.1 12 D-GND 9 R-det.2 13 L-ret. 8 VCC 14 Mode 7 Space 15 Note) Spatializer and the device trademark of circle-in-square R-ret. 6 VCA 16 R-out 5 F-in 17 S-out 4 F-out 18 L-out 3 R-in 19 2 1/2 VCC 20 L-in 1 GND ■ Pin Assignment are owned by Desper Products Inc.. This product can be used with the consent of the Desper Products Inc.. Under the terms of the agreement between Matsushita Electronics and Desper Products Inc., no technical information on the Spatializer, which is applied to this product, shall be provided. 1 AN7397K, AN7397S ICs for Audio Common Use ■ Pin Descriptions Pin No. Description Pin No. Description 1 L-in 11 SDA 2 1/2 VCC 12 R-det.1 3 L-out 13 R-det.2 4 S-out 14 VCC 5 R-out 15 Space 6 R-ret. 16 VCA 7 Mode 17 F-in 8 L-ret. 18 F-out 9 D-GND 19 R-in 10 SCL 20 GND ■ Absolute Maximum Ratings Parameter Symbol Rating Unit VCC 7.0 V ICC 100 mA PD 230 mW Topr −25 to +75 °C Tstg −55 to +125 °C Supply voltage Supply current Power dissipation *2 Operating ambient temperature Storage temperature *1 *1 Note) *1: Except for the operating ambient temperature and storage temperature, all ratings are for Ta = 25°C. *2: The power dissipation shown is the value for Ta = 75°C ■ Recommended Operating Range Parameter Supply voltage 2 Symbol Range Unit VCC 4.5 to 6.8 V ICs for Audio Common Use AN7397K, AN7397S ■ Electrical Characteristics at VCC = 5 V, f = 1 kHz, Ta = 25°C ± 2°C Parameter Symbol Total circuit current Maximum output voltage Output noise voltage 1 Voltage gain 1 *3 *1, 4 *3 Total harmonic distortion 1 Output noise voltage 2 Voltage gain 2 *1, 5 *6 Total harmonic distortion 2 I2C *2, 3 *2, 6 Conditions Min Typ Max Unit ITOTAL VIN = 0 mV 18 25 32 mA VOUT1 L-in, R-in THD = 1% 0.8 1.0 V[rms] VNO1 L-out, R-out RG = 4.7 kΩ 20 50 µV[rms] GV1 L-out, R-out VIN = 400 mV −2 0 2 dB THD1 L-out, R-out VIN = 400 mV 0.05 0.2 % VNO2 S-out RG = 4.7 kΩ 80 200 µV[rms] GV2 S-out VIN = 60 mV 343 450 685 mV[rms] THD2 S-out VIN = 60 mV 0.15 0.3 % Maximum value of sink current of pin 11 at ACK 2.0 10 mA interface Sink current at ACK IACK SCL/SDA signal input high- level VIHI 2.5 3.5 V SCL/SDA signal input low- level VILO 0 0.5 V Input-enable maximum frequency fImax 100 Kbit/s Min Typ Max Unit tBUF 4.0 µs Start condition set-up time tSU, STA 4.0 µs Start condition hold time tHD, STA 4.0 µs SCL/SDA low period tLO 4.0 µs SCL high period tHI 4.0 µs SCL/SDA rise time tR 1.0 µs SCL/SDA fall time tF 0.35 µs Data set-up time (Write) tSU, DAT 0.25 µs Data hold time (Write) tHD, DAT 0 µs Acknowledge set-up time tSU, ACK 3.5 µs Acknowledge hold time tHD, ACK 0 µs Stop condition set-up time tSU, STO 4.0 µs 0.1 1.0 1.9 LSB step Note) *1 : In measuring, the filter with A-characteristic curve is used. *2 : In measuring, the filter for the range of 15 Hz to 30 kHz (12 dB/OCT) is used. *3 : Mode: ST, L-in + R-in, VCA (I2C data: BFH) *4 : Mode: ST, VCA (I2C data: BFH) *5 : Mode: ST, VCA (I2C data: 80 H) *6 : Mode: ST, VCA (I2C data: 80 H) for either L-in or R-in • Design reference data Parameter I2C Symbol Conditions interface Bus free before start DAC 6-bit DAC DNLE L6 1 LSB = (Data (max.) − Data (00))/63 3 AN7397K, AN7397S ICs for Audio Common Use ■ Electrical Characteristics at VCC = 5 V, f = 1 kHz, Ta = 25°C ± 2°C (continued) • DAC timing chart Start condition Slave address Data byte ACK Stop ACK condition SDA tBUF tSU.DAT tLO tSU.STO tHD.DAT SCL tSU.STA tHD.STA tR tF tHI ■ Conceptual Explanation of Spatializer Operation • Normal stereo All sounds are heard from only between two speakers, right and left. • Conventional surround The sound expands toward the outside of the speaker system, but the sound position comes apart mostly in the conventional systems. • Spatializer The sound expands toward the outside of the two speakers, and yet their positions are stable and an expanded, deep sound are gotten. 4 tLO ICs for Audio Common Use AN7397K, AN7397S GND 47 nF 11 SDA A SCL 10 10 µF 12 R-det.1 B D-GND 9 10 µF 13 R-det.2 L-ret. 8 22 µF * VCC 14 7 Mode 16 VCA 5 2.2 µF A I2C GEN B R-out S-out L-out 2.2 µF 2.2 µF R-ret. 6 17 F-in 4 15 Space 150 kΩ 1 µF 18 F-out 3 100 nF 10 nF 47 nF 33 µF 19 1/2 VCC 2 L-in 1 µF 20 1 1 µF GND R-in ■ Application Circuit Example (Basic circuitry) Note) When switching noise occurs at mode switching, insert a capacitor between pin 7 and GND. *: For the capacitor of 22 µF, use that of a non-polar type. 5 Request for your special attention and precautions in using the technical information and semiconductors described in this material (1) An export permit needs to be obtained from the competent authorities of the Japanese Government if any of the products or technologies described in this material and controlled under the "Foreign Exchange and Foreign Trade Law" is to be exported or taken out of Japan. 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