LM4858 NSC [National Semiconductor], LM4858 Datasheet
LM4858
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LM4858 Summary of contents
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... The LM4858 features an externally controlled, micropower consumption shutdown mode and thermal shutdown protec- tion. The unity-gain stable LM4858’s gain is set by external gain-setting resistors Connection Diagrams Top View 10 Lead MSOP ...
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Typical Application FIGURE 1. Typical Audio Amplifier Application Circuit www.national.com 2 20064731 ...
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... L THD+N = 1%; LM4858MM BTL Mode 8Ω L THD+N = 1%; LM4858MM Mode 8Ω L THD+N = 1%; LM4858MM Mode 32Ω L THD+N = 1%; LM4858MM, LD SHUTDOWN, HP-IN SHUTDOWN, HP-IN SE Mode 32Ω 1kHz L 3 194˚C/W 52˚C/W 56˚C/W 4.3˚C/W (Note 2) −40˚C ≤ to 85˚C 2.4V ≤ V ≤ ...
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... IC with no external series resistor (resistance of discharge path must be under 50Ω). Note 8: All voltages are measured with respect to the ground pin, unless otherwise specified. Note 9: Limits are guaranteed to National’s AOQL ( Average Outgoing Quality Level ). Note 10: The given θ is for an LM4858LD with the Exposed-DAP soldered to an exposed 1in JA www.national.com (Notes 3.3V 25˚ ...
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... THD+N vs Output Power Functional Description 1/(2π 1/(2π Refer to the section, Proper Selection of External Components 1/(2π 200647A5 200647A7 5 . This resistor also forms LM4858LD THD+N vs Frequency 200647A6 LM4858LD THD+N vs Output Power 200647A8 www.national.com ...
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... Typical Performance Characteristics LD Specific Characteristics LM4858LD Power Dissipation vs Output Power Typical Performance Characteristics THD+N vs Frequency THD+N vs Frequency www.national.com (Continued) Power Derating Curve 200647A9 20064763 20064765 6 LM4858LD 200647B0 THD+N vs Frequency 20064764 THD+N vs Frequency 20064766 ...
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Typical Performance Characteristics THD+N vs Frequency THD+N vs Frequency THD+N vs Output Power (Continued) THD+N vs Frequency 20064767 THD+N vs Output Power 20064739 THD+N vs Output Power 20064741 7 20064768 20064740 20064742 www.national.com ...
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Typical Performance Characteristics THD+N vs Output Power THD+N vs Output Power THD+N vs Output Power www.national.com (Continued) THD+N vs Output Power 20064743 THD+N vs Output Power 20064745 Output Power vs Load Resistance 20064747 8 20064744 20064746 20064748 ...
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Typical Performance Characteristics Output Power vs Load Resistance Output Power vs Supply Voltage Power Dissipation vs Output Power (Continued) Output Power vs Supply Voltage 20064749 Dropout Voltage vs Supply Voltage 20064771 Power Dissipation vs Output Power 20064755 9 20064769 20064772 ...
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Typical Performance Characteristics Power Derating Curve Noise Floor Supply Current vs Supply Voltage www.national.com (Continued) 20064757 Open Loop Frequency Response 20064759 Power Supply Rejection Ratio 20064761 10 Channel Separation 20064780 20064762 20064760 ...
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... Package Engineering Group under application note AN1187. V BRIDGE CONFIGURATION EXPLANATION When the LM4858 is in BTL mode, the output of amplifier A1 serves as the input to amplifier A2, which results in both amplifiers producing signals identical in magnitude, but out of phase by 180˚. Consequently, the differential gain for the ...
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... PROPER SELECTION OF EXTERNAL COMPONENTS Proper selection of external components in applications us- ing integrated power amplifiers is critical for optimum device and system performance. While the LM4858 is tolerant to a variety of external component combinations, consideration must be given to the external component values that maxi- mize overall system quality. ...
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... The high frequency pole is determined by the product of the desired high frequency pole With 150kHz which is much smaller than the LM4858 GBWP of 10MHz. This difference indicates that a designer can still use the LM4858 at higher differential gains without bandwidth limitations. OPEAK are extrapolated PCB LAYOUT AND SUPPLY REGULATION CONSIDERATIONS FOR DRIVING 3Ω ...
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Application Information decreases with increasing load current. Reduced supply voltage causes decreased headroom, output signal clipping, and reduced output power. Even with tightly regulated sup- Demonstration Board Layout www.national.com plies, trace resistance creates the same effects as poor (Continued) supply ...
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Demonstration Board Layout FIGURE 4. Recommended MM PC Board Layout: (Continued) Bottom-Side Layout 15 200647B4 www.national.com ...
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... Physical Dimensions www.national.com inches (millimeters) unless otherwise noted 10-Lead Mini SOIC, 118 Mil Wide, .5mm Pitch PKG Order Number LM4858MM NS Package Number MUB10A 16 ...
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... National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. inches (millimeters) unless otherwise noted (Continued) 14-Lead LLP, 118 Mil Wide, .8mm Pitch PKG Order Number LM4858LD NS Package Number LDA14A 2. A critical component is any component of a life ...