KA9270 Samsung, KA9270 Datasheet
KA9270
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KA9270 Summary of contents
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... KA9270 INTRODUCTION The KA9270 is a monolithic integrated circuit designed for audio filter used in compact disc player, digital audio tape recorder, etc. FEATURES Functions: * Buffer for impedence matching * Low pass filter * De - emphasis control * Mute control * Reference voltage circuit ( 1/2 V Gain adjustable of audio output Minimum number of external parts required Recommand operation supply voltage range : 5 ...
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... KA9270 ABSOLUTE MAXIMUM RATINGS Characteristic Supply Voltage Power Dissipation Operating Temperature Storage Temperature ELECTRICAL CHARACTERISTICS ( 8V 1KHz 10K , De-emphasis; off, Mute; off, S1 & S2; off, unless otherwise specified Characteristic Symbol Quiescent Circuit Current I CC Maximum Output Voltage V OM Total Harmonic Distortion THD Frequency Characteristics ...
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... KA9270 TEST CIRCUIT CH2 3.3§Þ OUTPUT (Vo) 10K 0.0015§Þ 47§Þ 5.6K 0.01§Þ Vcc 330pF + 5.6K 5. LPF2 - + + - LPF1 5.6K 330pF 5.6K + CH1 3.3§Þ OUTPUT (Vo) 0.0015§Þ 10K 1/2 Vcc 1M 0.0012§Þ 12K + 4.7§ ...
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... KA9270 APPLICATION INFORMATION 1. BUFFER INPUT + (from D/A Converter - Output used for impedance matching, between D/A converter output and de-emphasis input. 2. DE-EMPHASIS a) De-emphasis operation condition Control Input High Low b) De-emphasis characteristic at the de-emphasis Fig. 4 Equevalent Circuit of De-emphasis ON Mode The de-emphasis charcteristics is dependent on the external parts value. ...
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... KA9270 3. MUTE R6 Vi Fig. 5 Equivalent Circuit of Mute Switch ON Mode Mute attenuation [M (att)] ratio is as follow (att log QON = 20 log (dB LOW PASS FILTER R3 Vi Cut off frequency ( QON - Fig. 6 Equivalent Circuit of LPF ) is as follow: C (Hz AUDIO FILTER Where internal TR QON ON resistance ...
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... KA9270 APPLICATION CIRCUIT 3.3 §Þ CH2 OUTPUT R L 10K Vcc C10 330p 20 19 LPF2 - + + - LPF1 330p + CH1 C5 OUTPUT 3.3 ¥ì (Vo 10K 1/2 Vcc C9 1M R12 5.6K 120uP 1500p 4.7 ¥ì 5.6K 5.6K R11 R10 10 ¥ì Vcc - + MUTE ...
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... KA9270 (PCB PATTERN) AUDIO FILTER ...