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LM4666SDA bảng dữ liệu(PDF) 4 Page - National Semiconductor (TI) |
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LM4666SDA bảng dữ liệu(HTML) 4 Page - National Semiconductor (TI) |
4 / 15 page Electrical Characteristics V DD =3V (Notes 1, 2) The following specifications apply for V DD = 3V and RL =15µH+8 Ω + 15µH unless otherwise specified. Limits apply for T A = 25˚C. Symbol Parameter Conditions LM4666 Units (Limits) Typical Limit (Note 6) (Notes 7, 8) I DD Quiescent Power Supply Current V IN = 0V, No Load V IN = 0V, RL =15µH+8 Ω + 15µH 6.5 7.0 10 mA (max) I SD Shutdown Current V SD = GND (Note 9) 0.02 2.0 µA (max) V SDIH Shutdown Voltage Input High 1.0 1.4 V (min) V SDIL Shutdown Voltage Input Low 0.8 0.4 V (max) V GSIH Gain Select Input High 1.0 1.4 V (min) V GSIL Gain Select Input Low 0.8 0.4 V (max) A V Closed Loop Gain V Gain Select =VDD 6 5.25 6.75 dB (min) dB (max) A V Closed Loop Gain V Gain Select = GND 12 11.25 12.75 dB (min) dB (max) V OS Output Offset Voltage 10 35 mV (max) T WU Wake-up Time 6 ms P o Output Power THD = 1% (max); f = 1kHz, 22kHz BW 450 400 mW (min) THD+N Total Harmonic Distortion+Noise P O = 100mWRMS/Channel, f IN = 1kHz, 22kHz BW, Both channels in phase 0.65 % X TALK Channel Separation P O = 100mWRMS, f = 1kHz 57 dB R IN Differential Input Resistance V Gain Select =VDD 90 k Ω V Gain Select = GND 60 k Ω PSRR Power Supply Rejection Ratio V ripple = 100mVRMS sine wave, f RIPPLE = 217Hz, Inputs terminated to AC GND 60 dB V Ripple = 100mVRMS sine wave, f RIPPLE = 217Hz, P OUT = 10mW,1kHz 65 dB CMRR Common Mode Rejection Ratio V Ripple = 100mVRMS, f Ripple = 217Hz, Input referred 48 dB SNR Signal to Noise Ratio P O = 400mWRMS, A-Weighted Filter 83 dB e OUT Output Noise A-Weighted filter, V in = 0V 125 µV Note 1: All voltages are measured with respect to the ground pin, unless otherwise specified. Note 2: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which guarantee specific performance limits. This assumes that the device is within the Operating Ratings. Specifications are not guaranteed for parameters where no limit is given, however, the typical value is a good indication of device performance. Note 3: The maximum power dissipation must be derated at elevated temperatures and is dictated by TJMAX, θJA, and the ambient temperature TA. The maximum allowable power dissipation is PDMAX =(TJMAX–TA)/θJA or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4666, TJMAX = 150˚C. The typical θJA is 63˚C/W and the typical θJC is 12˚C/W for the SDA package. Note 4: Human body model, 100pF discharged through a 1.5k Ω resistor. Note 5: Machine Model, 220pF – 240pF discharged through all pins. Note 6: Typical specifications are specified at 25˚C and represent the parametric norm. Note 7: Tested limits are guaranteed to National’s AOQL (Average Outgoing Quality Level). Note 8: Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis. Note 9: Shutdown current is measured in a normal room environment. Exposure to direct sunlight will increase ISD by a maximum of 2µA. The Shutdown pin should be driven as close as possible to GND for minimal shutdown current and to VDD for the best THD performance in PLAY mode. See the Application Information section under SHUTDOWN FUNCTION for more information. Note 10: The performance graphs were taken using the Audio Precision AUX–0025 Switching Amplifier Measurement Filter in series with the LC filter on the demo board. www.national.com 4 |
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