LM4900 National Semiconductor, LM4900 Datasheet
LM4900
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LM4900 Summary of contents
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... LM4900 265mW at 3.3V Supply Audio Power Amplifier with Shutdown Mode General Description The LM4900 is a bridged audio power amplifier capable of delivering 265mW of continuous average power into an 8 load with 1% THD+N from a 3.3V power supply. Boomer ® audio power amplifiers were designed specifically to provide high quality output power from a low supply volt- age while requiring a minimal amount of external compo- nents ...
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... Connection Diagrams www.national.com MSOP and SOP Package DS200064-2 Top View Order Number LM4900MM, LM4900M See NS Package Number MUA08A, M08A LLP Package DS200064-76 Top View Order Number LM4900LD See NS Package Number LDA08B 2 ...
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... T −40˚ MAX 2.0V V LM4900 Limit Typical (Notes 7, (Note 6.0 0 675 300 0 LM4900 Limit Typical (Notes 7, (Note 0 265 0 www.national.com 35˚C/W 170˚C/W 56˚C/W 190˚C/W 67˚C/W +85˚C A 5.5V DD ...
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... THD = 1% (max 1kHz 100 mWrms < 20Hz f 20kHz, BW 80kHz V = 200mV sine p-p RIPPLE f = 217Hz (Note 11 1KHz (Note 11) − the number given in the Absolute Maximum Ratings, whichever is lower. For the LM4900 resistor. 4 LM4900 Limit Typical (Notes 7, (Note 6) 9) 2.6 4 0.1 2 130 ...
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External Components Description Components 1. R Inverting input resistance which sets the closed-loop gain in conjunction with R i high pass filter with Input coupling capacitor which blocks the DC voltage at the amplifier’s input terminals. Also ...
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Typical Performance Characteristics THD+N vs Frequency THD+N vs Frequency THD+N vs Frequency www.national.com (Continued) THD+N vs Frequency DS200064-34 THD+N vs Frequency DS200064-36 THD+N vs Frequency DS200064-38 6 DS200064-35 DS200064-37 DS200064-39 ...
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Typical Performance Characteristics THD+N vs Frequency THD+N vs Output Power THD+N vs Output Power (Continued) THD+N vs Output Power DS200064-40 THD+N vs Output Power DS200064-42 THD+N vs Output Power DS200064-44 7 DS200064-41 DS200064-43 DS200064-45 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 DS200064-46 THD+N vs Output Power DS200064-48 THD+N vs Output Power DS200064-50 8 DS200064-47 DS200064-49 DS200064-51 ...
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Typical Performance Characteristics Output Power vs Supply Voltage Output Power vs Supply Voltage Output Power vs Load Resistance (Continued) Output Power vs Supply Voltage DS200064-52 Output Power vs Supply Voltage DS200064-54 Power Dissipation vs Output Power DS200064-56 9 DS200064-53 DS200064-55 ...
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Typical Performance Characteristics Power Dissipation vs Output Power Clipping Voltage vs Supply Voltage Noise Floor www.national.com (Continued) Power Dissipation vs Output Power DS200064-58 Noise Floor DS200064-60 Frequency Response vs Input Capacitor Size DS200064-62 10 DS200064-59 DS200064-61 DS200064-71 ...
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Typical Performance Characteristics Power Supply Rejection Ratio Power Supply Rejection Ratio Power Supply Rejection Ratio vs Supply Voltage (Continued) Power Supply Rejection Ratio DS200064-63 Power Supply Rejection Ratio DS200064-65 Power Supply Rejection Ratio vs Supply Voltage DS200064-67 11 DS200064-64 DS200064-66 ...
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... Shutdown Voltage Supply Current vs Supply Voltage Open Loop Frequency Response Note 12: This curve shows the LM4900LD’s thermal dissipation ability at different ambient temperatures given the exposed-DAP of the part is soldered to a plane of 1oz. Cu with an area given in the label of each curve. www.national.com (Continued) ...
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... National Semiconductor’s Package Engineering Group under application note AN1187. BRIDGE CONFIGURATION EXPLANATION As shown in Figure 1 , the LM4900 has two operational amplifiers internally, allowing for a few different amplifier configurations. The first amplifier’s gain is externally config- urable, while the second amplifier is internally fixed in a unity-gain, inverting configuration ...
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... Extra supply voltage creates headroom that allows the LM4900 to reproduce peaks in excess of 700 mW without producing audible distortion. At this time, the de- signer must make sure that the power supply choice along ...
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... GBWP 100kHz which is much smaller than the LM4900 GBWP of 25MHz. This figure displays that if a designer has a need to design an amplifier with a higher differential gain, the LM4900 can still be used without running into bandwidth problems. (Continued) ( ...
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... Application Information FIGURE 2. Differential Amplifier Configuration for LM4900 www.national.com (Continued) 16 DS200064-74 ...
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... Physical Dimensions inches (millimeters) unless otherwise noted 8-Lead (0.118" Wide) Molded Mini Small Outline Package Order Number LM4900MM NS Package Number MUA08A 17 www.national.com ...
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... Physical Dimensions www.national.com inches (millimeters) unless otherwise noted (Continued) Order Number LM4900LD NS Package Number LDA08B SO Order Number LM4900M NS Package Number M08A 18 ...
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... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...