AN7397SAN7397S, Serwisówki TV, Układy Scalone
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ICs for Audio Common Use AN7397S, AN7397K Spatializer IC for I 2 C bus Overview Spatializer Audio Processor is a signal process- ing 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 AN7397S/AN7397K utilizes the innovative technology adopted in that system, and provides sound enhancement effect and sound expansion with the conventional 2-speaker stereo system. AN7397S Unit: mm 12.6±0.3 20 11 1 10 0.3 0 ° to 10 ° (0.60) 1.27 0.40±0.25 Seating plane Seating plane Features • Provides deep 3-D sound with conventional 2- speaker 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 sig- nal is achieved. • Positions and moves each sound source on 270° arc in real time. • An on-chip serial control bus (i.e., I 2 C) to vary space-effect and change modes. SOP020-P-0300B AN7397K Unit: mm 19.1±0.3 20 11 1 10 7.62±0.25 1.778 0.5±0.1 0.90±0.25 Seating plane SDIP020-P-0300 Applications • Televisions, videos, audio equipment, DVDs, per- sonal computers, and game machines Pin Assignment 1 AN7397S, AN7397K ICs for Audio Common Use Pin Descriptions Pin No. Description Pin No. Description 1 L-in 11 SDA 2 1/2 V CC 12 R-det.1 3 L-out 13 R-det.2 4 S-out 14 V CC 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 Supply voltage V CC 7.0 V Supply current I CC 100 mA Power dissipation * 2 P D 230 mW Operating ambient temperature * 1 T opr −25 to +75 °C Storage temperature * 1 T stg −55 to +125 °C Note) * 1: Except for the operating ambient temperature and storage temperature, all ratings are for T a = 25°C. * 2: The power dissipation shown is the value for T a = 75°C Recommended Operating Range Parameter Symbol Range Unit Supply voltage V CC 4.5 to 6.8 V 2 ICs for Audio Common Use AN7397S, AN7397K Electrical Characteristics at V CC = 5 V, f = 1 kHz, T a = 25 ° C ± 2 ° C Parameter Symbol Conditions Min Typ Max Unit Total circuit current I TOTAL V IN = 0 mV 18 25 32 mA Maximum output voltage * 3 V OUT1 L-in, R-in THD = 1% 0.8 1.0 V[rms] Output noise voltage 1 * 1, 4 V NO1 L-out, R-out R G = 4.7 k Ω 20 50 µ V[rms] Voltage gain 1 * 3 G V1 L-out, R-out V IN = 400 mV −2 0 2 dB Total harmonic distortion 1 * 2, 3 THD 1 L-out, R-out V IN = 400 mV 0.05 0.2 % Output noise voltage 2 * 1, 5 V NO2 S-out R G = 4.7 k Ω 80 200 µ V[rms] Voltage gain 2 * 6 G V2 S-out V IN = 60 mV 343 450 685 mV[rms] Total harmonic distortion 2 * 2, 6 THD 2 S-out V IN = 60 mV 0.15 0.3 % I 2 C interface Sink current at ACK I ACK Maximum value of sink current of 2.0 10 mA pin 11 at ACK SCL/SDA signal input high- level V IHI 2.5 3.5 V SCL/SDA signal input low- level V ILO 0 0.5 V Input-enable maximum frequency f Imax 100 Kbit/s 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 (I 2 C data: BFH) * 4 : Mode: ST, VCA (I 2 C data: BFH) * 5 : Mode: ST, VCA (I 2 C data: 80 H) * 6 : Mode: ST, VCA (I 2 C data: 80 H) for either L-in or R-in • Design reference data Parameter Symbol Conditions Min Typ Max Unit I 2 C interface Bus free before start t BUF 4.0 µ s Start condition set-up time t SU, STA 4.0 µ s Start condition hold time t HD, STA 4.0 µ s SCL/SDA low period t LO 4.0 µ s SCL high period t HI 4.0 µ s SCL/SDA rise time t R 1.0 µ s SCL/SDA fall time t F 0.35 µ s Data set-up time (Write) t SU, DAT 0.25 µ s Data hold time (Write) t HD, DAT 0 µ s Acknowledge set-up time t SU, ACK 3.5 µ s Acknowledge hold time t HD, ACK 0 µ s Stop condition set-up time t SU, STO 4.0 µ s DAC 6-bit DAC DNLE L 6 1 LSB = (Data (max.) − Data (00))/63 0.1 1.0 1.9 LSB step 3 AN7397S, AN7397K ICs for Audio Common Use Electrical Characteristics at V CC = 5 V, f = 1 kHz, T a = 25 ° C ± 2 ° C (continued) • DAC timing chart Start condition Slave address ACK Data byte ACK Stop condit ion SDA t BUF t SU.DAT t HD.DAT t SU.STO SCL t SU.STA t HD.STA t R t F t HI t LO 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 con- ventional 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 t LO ICs for Audio Common Use AN7397S, AN7397K Application Circuit Example (Basic circuitry) I 2 C GEN A B 10 nF A 47 nF GND B 47 nF 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. Remarks • Spatializer is a registered trademark of Desper Products Inc. For using this product, you are required to get approval of Desper Products Inc. • License agreement (To be agreed between you and Desper Products Inc.) 5 [ Pobierz całość w formacie PDF ] |
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