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TDA7438 데이터시트(PDF) 4 Page - STMicroelectronics |
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TDA7438 데이터시트(HTML) 4 Page - STMicroelectronics |
4 / 17 page ELECTRICAL CHARACTERISTICS (continued.) Symbol Parameter Test Condition Min. Typ. Max. Unit AUDIO OUTPUTS VCLIP Clipping Level d = 0.3% 2.1 2.6 VRMS RL Output Load Resistance 2 K Ω RO Output Impedance 10 40 70 Ω VDC DC Voltage Level 3.8 V GENERAL (Gain, Bass, Treble, Middle Controls Flat) ENO Output Noise All gains = 0dB; BW = 20Hz to 20KHz flat 515 µV Et Total Tracking Error (Volume + Speaker Attenuator) AV = 0 to -24dB 0 1 dB AV = -24 to -47dB 0 2 dB AV = -47 to -79dB 0 3 dB S/N Signal to Noise Ratio All gains 0dB; VO =1VRMS ; 90 106 dB SC Channel Separation Left/Right 80 100 dB d Distortion AV =0; VI =1VRMS ; 0.01 0.08 % BUS INPUT VIL Input Low Voltage 1V VIH Input High Voltage 3 V IIN Input Current VIN = 0.4V -5 5 µA 0/30dB 2dB STEP MUXOUTL INL VOLUME VOLUME TREBLE TREBLE TREBLE(L) MIDDLE MIDDLE MUXOUTR INR TREBLE(R) BOUT(L) SPKR ATT LEFT LOUT SCL SDA DIGGND ROUT D96AU490A I 2CBUS DECODER + LATCHES 5.6nF 2.2 µF 100K 100K 100K G L-IN1 L-IN2 L-IN3 0.47 µF 0.47 µF 0.47 µF 100K 100K 100K R-IN1 R-IN2 R-IN3 0.47 µF 0.47 µF 0.47 µF G INPUT MULTIPLEXER + GAIN MOUT(L) BASS BIN(L) 18nF 22nF 100nF 100nF 2.7K 5.6K BASS SPKR ATT RIGHT MOUT(R) BOUT(R) BIN(R) 5.6nF 18nF 22nF 100nF 100nF 2.7K 5.6K SUPPLY 10 µF CREF AGND V S R M R B RM RB 27 3 4 5 2 1 28 21 22 20 26 24 25 8 9 19 10 11 12 13 23 6 7 18 17 16 14 15 VREF 2.2 µF TEST CIRCUIT TDA7438 4/17 |
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