LM4858LD National Semiconductor, LM4858LD Datasheet
LM4858LD
Specifications of LM4858LD
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LM4858LD Summary of contents
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... Portable computers n Desktop computers n PDA’s n Handheld games 20064729 See NS Package Number LDA14A DS200647 May 2003 1.9W (typ) 1.7W (typ) 1.5W (typ) 1.1W (typ) 300mW (typ) 95mW (typ) 1% (typ) 2.4 to 5.5V 18µA (typ) 20064728 Top View 14 Lead LLP Order Number LM4858LD www.national.com ...
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Typical Application FIGURE 1. Typical Audio Amplifier Application Circuit www.national.com 2 20064731 ...
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... Mode SHUTDOWN DD BTL Mode BTL OUT+ to BTL OUT− BTL Mode 3Ω L THD+N = 1%; LM4858LD BTL Mode 4Ω L THD+N = 1%; LM4858LD BTL Mode 4Ω 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 ...
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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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... Typical Performance Characteristics LD Specific Characteristics LM4858LD THD+N vs Frequency LM4858LD 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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Typical Performance Characteristics Application Information BRIDGED AND SINGLE-ENDED OPERATION As shown in Figure 1, the LM4858 contains three operational amplifiers (A1-A3). These amplifiers can be configured for SE or BTL modes. In the SE mode, the LM4858 operates as a ...
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Application Information amplifier’s closed-loop gain without causing excessive out- put signal clipping, please refer to the Audio Power Ampli- fier Design section. A bridge configuration, such as the one used in LM4858, also creates a second advantage over single-ended amplifi- ...
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Application Information The LM4858’s unity-gain stability allows a designer to maxi- mize system performance. The LM4858’s gain should be set no higher than necessary for any given application. A low gain configuration maximizes signal-to-noise performance and minimizes THD+N. However, a ...
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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 ...