LM4880 National Semiconductor, LM4880 Datasheet
LM4880
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LM4880 Summary of contents
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... LM4880 Dual 250 mW Audio Power Amplifier with Shutdown Mode General Description The LM4880 is a dual audio power amplifier capable of deliv- ering typically 250 mW per channel of continuous average power load with 0.1% (THD) using a 5V power sup- ply. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components using surface mount packaging ...
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... Connection Diagram www.national.com Small Outline and DIP Packages DS012343-2 Top View Order Number LM4880M or LM4880N See NS Package Number M08A for Package Number N08E for DIP 2 ...
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... mW kHz = 1.0 µ 200 mVrms 100 Hz V RIPPLE , JMAX or the number given in the Absolute Maximum Ratings, whichever is lower. For the LM4880 resistor. 3 37˚C/W 107˚C/W 35˚C/W 170˚C/W −40˚C T +85˚C A 2. 25˚C. ...
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Automatic Shutdown Circuit Automatic Switching Circuit External Components Description Components 1. R Inverting input resistance which sets the closed-loop gain in conjunction with R i also forms a high pass filter with Input coupling capacitor which blocks ...
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External Components Description Components 4. C Supply bypass capacitor which provides power supply filtering. Refer to the Application S Information section for proper placement and selection of the supply bypass capacitor Bypass pin capacitor which provides half-supply filtering. ...
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Typical Performance Characteristics THD + N vs Frequency DS012343-14 Output Power vs Supply Voltage DS012343-17 Clipping Voltage vs Supply Voltage DS012343-20 www.national.com (Continued) Output Power vs Load Resistance DS012343-15 Output Power vs Supply Voltage DS012343-18 Clipping Voltage vs Supply Voltage ...
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Typical Performance Characteristics Channel Separation DS012343-23 Power Supply Rejection Ratio DS012343-26 Frequency Response vs Output Capacitor Size DS012343-29 (Continued) Output Attenuation in Shutdown Mode DS012343-24 Open Loop Frequency Response DS012343-27 Frequency Response vs Output Capacitor Size DS012343-30 7 Noise Floor ...
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... L AUTOMATIC SHUTDOWN CIRCUIT As shown in Figure 2 , the LM4880 can be set up to automati- cally shutdown when a load is not connected. This circuit is based upon a single control pin common in many head- phone jacks. This control pin forms a normally closed switch with one of the output pins. The output of this circuit (the volt- age on pin 5 of the LM4880) has two states based on the state of the switch ...
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... LM4861 shutdown pin is low and the voltage at the LM4880 pin is high. This results in the LM4880 being shutdown and the LM4861 being enabled. Only one channel of this circuit is shown in Figure 3 to keep ...
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... GBWP = 135 kHz which is much smaller than the LM4880 GBWP of 12.5 MHz. This figure displays that if a designer has a need top design an amplifier with a higher gain, the LM4880 can still be used without running , create first or- L into bandwidth limitations. ...
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... Physical Dimensions inches (millimeters) unless otherwise noted 8-Lead (0.150" Wide) Molded Small Outline Package, JEDEC 8-Lead (0.300" Wide) Molded Dual-In-Line Package Order Number LM4880M NS Package Number M08A Order Number LM4880N NS Package Number N08E 11 www.national.com ...
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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 ...