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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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LM4931 bảng dữ liệu(PDF) 9 Page - National Semiconductor (TI) |
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LM4931 bảng dữ liệu(HTML) 9 Page - National Semiconductor (TI) |
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9 / 47 page  Electrical Characteristics DV DD = 3.3V, AVDD = 5V, RLHP =32Ω,RLHF =8Ω (Notes 1, 2) (Continued) The following specifications apply for the circuit shown in Figure 1, unless otherwise specified. Limits apply for T A= 25˚C. Symbol Parameter Conditions LM4931 Units (Limits) Typical (Note 6) Limits (Note 7) V FS Full-Scale Output Voltage (Mono speaker amplifie)r 8 Ω load, 0dB gain setting 2.6 V P-P THD+N Total Harmonic Distortion + Noise f OUT = 1kHz, POUT = 400mW 0.16 % P OLS Loudspeaker Amplifier Output Power THD = 1%, f OUT = 1kHz 1.1 W PSRR Power Supply Rejection Ratio (Loudspeaker Amplifier) C B = 1.0µF V RIPPLE = 200mVPP f RIPPLE = 217Hz 56 dB SNR (Voice) Signal-to-Noise Ratio of Voice Channel (Loudspeaker Amplifier) Signal = V O at 0dBFS, f = 1kHz Noise = digital zero, A-weighted 0dB gain setting (Note 10) f MCLK = 12.288MHz, PLL disabled 70 dB f MCLK = 12MHz, PLL active 69 dB SNR (Music) Signal-to-Noise Ratio of Music Channel (Loudspeaker Amplifier) Signal = V O at 0dBFS, f = 1kHz Noise = digital zero, A-weighted 0dB gain setting (Note 10) f MCLK = 12.288MHz, PLL disabled 74 dB f MCLK = 12MHz, PLL active 73 dB A-Weighted filter, V IN= digital zero (Note 10) e N (Music) Output Noise f MCLK = 12.288MHz, PLL disabled 250 µV f MCLK = 12MHz, PLL active 320 µV V OS Offset Voltage 10 mV VCR Volume Control Range (Loudspeaker Amplifier) Minimum Gain –34.5 dB Maximum Gain 12 dB SS Volume Control Step Size 1.5 dB Headphone Amplifier V FS Full-Scale Output Voltage (Headphone Amplifier) 32 Ω stereo load, 0dB gain setting 2.6 V P-P THD+N Total Harmonic Distortion + Noise (Headphone Amplifier) f IN = 1kHz, POUT = 7.5mW 32 Ω stereo load 0.05 % P OHP Output Power (Headphone Amplifier) THD = 0.5%, f OUT = 1kHz 26 20 mW (min) PSRR Power Supply Rejection Ratio (Headphone Amplifier) C B = 1.0µF V RIPPLE = 200mVPP f RIPPLE = 217Hz 70 dB SNR (Voice) Signal-to-Noise Ratio of Voice Channel (Headphone Amplifier) Signal = V O at f = 1kHz and 1% THD+N, Noise = digital zero, A-weighted 0dB gain setting (Note 10) f MCLK = 12.288MHz, PLL disabled 75 dB f MCLK = 12MHz, PLL active 73 dB SNR (Music) Signal-to-Noise Ratio of Music Channel (Headphone Amplifier) Signal = V O at f = 1kHz and 1% THD+N, Noise = digital zero, A-weighted 0dB gain setting (Note 10) f MCLK = 12.288MHz, PLL disabled 86 dB f MCLK = 12MHz, PLL active 82 dB www.national.com 9 |
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