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LM4874 Fiches technique(PDF) 3 Page - National Semiconductor (TI) |
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LM4874 Fiches technique(HTML) 3 Page - National Semiconductor (TI) |
3 / 21 page Absolute Maximum Ratings (Notes 2, 3) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage 6.0V Storage Temperature -65˚C to + 150˚C Input Voltage −0.3V to V DD + 0.3V Power Dissipation (Note 4) Internally Limited ESD Susceptibility (Note 5) 2000V ESD Susceptibility (Note 6) 200V Junction Temperature 150˚C Soldering Information Small Outline Package Vapor Phase (60 sec.) 215˚C Infrared (15 sec.) 220˚C See AN-450 “Surface Mounting and their Effects on Product Reliability” for other methods of soldering surface mount devices. Thermal Resistance θ JC (typ) MXA20A 2˚C/W θ JA (typ) MXA20A 41˚C/W (Note 7) Operating Ratings Temperature Range T MIN ≤ T A ≤T MAX −40˚C ≤ TA ≤ 85˚C Supply Voltage 3.0 V ≤ V DD ≤ 5.5V Electrical Characteristics for LM4874 (Notes 2, 8) The following specifications applies to the LM4874 when used in the circuit shown in Figure 1 and operating with V DD =5Vand A V = 6dB, unless otherwise specified. Limits apply for TA = 25˚C. Symbol Parameter Conditions LM4874 Units (Limits) Typical (Note 8) Limit (Notes 9, 10) V DD Supply Voltage 3.0 5.5 V (min) V (max) I DD Quiescent Power Supply Current V IN = 0V, IO = 0A, RL = ∞ 9.0 12.0 mA (max) I SD Shutdown Current V shutdown = GND 0.1 1.0 µA (max) V OS Output Offset Voltage 7 50 mV (max) PSRR Output Supply Rejection Ratio V DD = 5V, VRIPPLE = 200mVP-P sinewave, C BYPASS = 0.47µF, R L =8 Ω 62 dB P O Output Power (Note 11) THD+N = 1% (max), f = 1kHz (Note12) R L =3 Ω R L =4 Ω R L =8 Ω 2.1 1.9 1.2 1.0 W W W (min) THD+N = 10% (max), f = 1kHz (Note12) R L =3 Ω R L =4 Ω R L =8 Ω 2.6 2.6 1.5 W W W THD+N Total Harmonic Distortion + Noise 20Hz ≤ f ≤ 20kHz R L =4 Ω,P O =2W R L =8 Ω,P O =1W 0.3 0.3 % % S/N Signal-to-Noise Ratio f = 1kHz, C BYPASS = 0.47µF, P O = 1.1W, RL =8 Ω 97 dB R IN Input Resistance Pins 5, 7, 9, and 17 See Table 1. Note 1: An LM4874MH that has been properly mounted to a circuit board with a copper heatsink area of at least 2in2 will deliver 1.9W into 4 Ω or 2.1W into 3Ω. Note 2: All voltages are measured with respect to the GND pin unless other wise specified. Note 3: 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 that 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 4: 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 LM4874, see power derating currents for more information. Note 5: Human body model, 100 pF discharged through a 1.5 k Ω resistor. www.national.com 3 |
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