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LM4857GR Datasheet(PDF) 9 Page - National Semiconductor (TI) |
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LM4857GR Datasheet(HTML) 9 Page - National Semiconductor (TI) |
9 / 38 page Audio Amplifier Electrical Characteristics V DD = 3.0V (Notes 1, 2) (Continued) The following specifications apply for V DD = 3.0V, unless otherwise specified. Limits apply for TA = 25˚C. Symbol Parameter Conditions LM4857 Units (Limits) Typical (Note 6) Limits (Notes 7, 8) P O Output Power Speaker; THD+N = 1%; f = 1kHz; 8 Ω BTL 400 320 mW (min) Headphone; THD+N = 1%; f = 1kHz; 32 Ω SE 25 20 mW (min) Earpiece; THD+N = 1%; f = 1kHz; 32 Ω BTL; CD4 = 0 30 22 mW (min) Earpiece; THD+N = 1%; f = 1kHz; 32 Ω BTL; CD4 = 1 30 mW THD+N Total Harmonic Distortion Plus Noise LD5=RD5=0 Speaker; P O= 200mW; f = 1kHz; 8 Ω BTL 0.05 % Headphone; P O= 10mW; f = 1kHz; 32 Ω SE 0.04 % Earpiece; P O=10mW; f = 1kHz; 32 Ω BTL; CD4 = 0 0.06 % Line Out; V O=1VRMS; f = 1kHz; 5k Ω SE 0.015 % V OS Offset Voltage Speaker; LD5 = RD5 = 0 5 40 mV (max) Earpiece; LD5 = RD5 = 0 5 30 mV (max) N OUT Output Noise A-weighted; 0dB gain; (Note 11) LD5 = RD5 = 0; All Inputs Terminated Speaker; Mode 2, 3, 7, 8 27 µV Speaker; Mode 12, 13 38 µV Headphone; Mode 3, 4, 8, 9 10 µV Headphone; Mode 13, 14 14 µV Earpiece; Mode 1 13 µV Earpiece; Mode 6 18 µV Earpiece; Mode 11 21 µV Line Out; Mode 5 11 µV Line Out; Mode 10 14 µV Line Out; Mode 15 17 µV PSRR Power Supply Rejection Ratio f = 217Hz, V rip = 200mVpp;CB = 2.2µF; 0dB gain; (Note 11) LD5 = RD5 = 0; All Audio Inputs Terminated Speaker; Mode 2, 3, 7, 8 70 dB Speaker; Mode 12, 13, 65 55 dB (min) Headphone; Mode 3, 4, 8, 9 87 dB Headphone; Mode 13, 14 75 62 dB (min) Earpiece; Mode1 76 dB Earpiece; Mode 6 70 dB Earpiece; Mode 11 67 57 dB (min) Line Out; Mode 5 88 dB Line Out; Mode 10 74 dB Line Out; Mode 15 71 58 dB (min) www.national.com 9 |
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