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LM4898 Datasheet(PDF) 5 Page - National Semiconductor (TI) |
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LM4898 Datasheet(HTML) 5 Page - National Semiconductor (TI) |
5 / 17 page Electrical Characteristics V DD =3V (Notes 1, 2, 8) The following specifications apply for V DD = 3V, 8 Ω load and A V = 1V/V, unless otherwise specified. Limits apply for TA = 25˚C. Symbol Parameter Conditions LM4898 Units (Limits) Typical Limit (Note 6) (Note 7) I DD Quiescent Power Supply Current V IN = 0V, no load 2.5 5 .5 mA (max) V IN = 0V, RL =8 Ω 49 I SD Shutdown Current V SDMODE =VSHUTDOWN = GND 0.1 1 µA (max) P o Output Power THD = 1% (max); f = 1kHz LM4898, RL = 8 Ω 0.35 W THD+N Total Harmonic Distortion+Noise P o = 0.25Wrms; f = 1kHz 0.03 % PSRR Power Supply Rejection Ratio V ripple = 200mV sine p-p f = 217Hz (Note 9) 83 dB f = 1kHz (Note 9) 84 f = 217Hz (Note 10) 83 f = 1kHz (Note 10) 83 CMRR Common-Mode Rejection Ratio f = 217Hz V CM = 200mVPP 50 dB V OS Output Offset V IN =0V 2 mV V SDIH Shutdown Voltage Input High SD Mode = GND 0.8 V V SDIL Shutdown Voltage Input Low SD Mode = GND 0.6 V V SDIH Shutdown Voltage Input High SD Mode = V DD 0.8 V V SDIL Shutdown Voltage Input Low SD Mode = V DD 0.6 V 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. 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: Typicals are measured at 25˚C and represent the parametric norm. Note 7: Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis. Note 8: For micro SMD only, shutdown current is measured in a Normal Room Environment. Exposure to direct sunlight will increase ISD by a maximum of 2µA. Note 9: Unterminated input. Note 10: 10 Ω terminated input. Note 11: When driving 4 Ω loads from a 5V supply, the LM4898LD must be mounted to a circuit board with the exposed-DAP area soldered down to a 1sq. in plane of 1oz. copper.. External Components Description (Figure 1) Components Functional Description 1. C S Supply bypass capacitor which provides power supply filtering. Refer to the Power Supply Bypassing section for information concerning proper placement and selection of the supply bypass capacitor. 2. C B Bypass pin capacitor which provides half-supply filtering. Refer to the section, Proper Selection of External Components, for information concerning proper placement and selection of C B. 3. R i Inverting input resistance which sets the closed-loop gain in conjunction with R f. 4. R f Feedback resistance which sets the closed-loop gain in conjunction with R i. www.national.com 5 |
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