LM4811MM National Semiconductor, LM4811MM Datasheet

Page 1

... The unity-gain stable LM4811 also features an externally controlled, active-high, micropower consumption shutdown mode. It also has an internal thermal shutdown protection mechanism. Connection Diagrams MSOP Package Top View Order Number LM4811MM See NS Package Number MUB10A Boomer ® registered trademark of National Semiconductor Corporation. © 2002 National Semiconductor Corporation Key Specifications n THD+N at 1kHz, 105mW continuous average output power into 16Ω ...

Page 2

Typical Application *Refer to the Application Information Section for information concerning proper selection of the input and output coupling capacitors. FIGURE 1. Typical Audio Amplifier Application Circuit www.national.com 2 20006101 ...

Page 3

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage Storage Temperature ESD Susceptibility (Note 3) ESD Susceptibility Machine model (Note 6) Junction Temperature ( Soldering Information Small Outline Package Vapor Phase (60 sec.) ...

Page 4

Electrical Characteristics The following specifications apply for V Symbol Parameter I Supply Current DD I Shutdown Current SD V Output Offset Voltage OS P Output Power o THD+N Total Harmonic Distortion PSRR Power Supply Rejection Ratio V (CLOCK, UP/DN, SHUTDOWN) ...

Page 5

Electrical Characteristics The following specifications apply for V Symbol Parameter Shutdown Attenuation Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Note 2: Operating Ratings indicate conditions for which the device is functional, but ...

Page 6

Typical Performance Characteristics THD+N vs Frequency THD+N vs Frequency THD+N vs Frequency www.national.com (Continued) THD+N vs Frequency 20006105 THD+N vs Frequency 20006107 THD+N vs Frequency 20006109 6 20006106 20006108 20006110 ...

Page 7

Typical Performance Characteristics THD+N vs Frequency THD+N vs Output Power THD+N vs Output Power (Continued) THD+N vs Output Power 20006111 THD+N vs Output Power 20006113 THD+N vs Output Power 20006115 7 20006112 20006114 20006116 www.national.com ...

Page 8

Typical Performance Characteristics THD+N vs Output Power THD+N vs Output Power Output Power vs Load Resistance www.national.com (Continued) THD+N vs Output Power 20006117 THD+N vs Output Power 20006119 Output Power vs Load Resistance 20006122 8 20006118 20006120 20006123 ...

Page 9

Typical Performance Characteristics Output Power vs Load Resistance Output Power vs Power Supply Dropout Voltage vs Supply Voltage (Continued) 20006124 20006126 Power Dissipation vs 20006128 9 Output Power vs Supply Voltage 20006125 Output Power vs Power Supply 20006127 Output Power ...

Page 10

Typical Performance Characteristics Power Dissipation vs Output Power Channel Separation Noise Floor www.national.com (Continued) Power Dissipation vs 20006130 Channel Separation 20006132 Power Supply Rejection Ratio 20006134 10 Output Power 20006131 20006133 20006135 ...

Page 11

Typical Performance Characteristics Power Supply Rejection Ratio Frequency Response Application Information DIGITAL VOLUME CONTROL The LM4811’s gain is controlled by the signals applied to the CLOCK and UP/DN inputs. An external clock is required to drive the CLOCK pin. At ...

Page 12

... Further detailed and specific information concerning PCB (Continued) layout, fabrication, and mounting an LD (LLP) package is available from National Semiconductor’s Package Engineer- ing Group under application note AN1187. POWER SUPPLY BYPASSING As with any power amplifier, proper supply bypassing is critical for low noise performance and high power supply rejection ...

Page 13

Application Information Selection of Input and Output Capacitor Size Besides gain, one of the major considerations is the closed loop bandwidth of the amplifier large extent, the band- width is dicated by the choice of external components shown ...

Page 14

Application Information www.national.com (Continued) FIGURE 3. Demo Board Schematic 14 20006161 ...

Page 15

Application Information FIGURE 4. Recommended MSOP PC Board Layout: FIGURE 5. Recommended MSOP PC Board Layout: FIGURE 6. Recommended MSOP PC Board Layout: (Continued) TOP Silk Screen TOP Top Layer Bottom Layer 15 20006158 20006159 20006160 www.national.com ...

Page 16

Application Information www.national.com (Continued) FIGURE 7. Recommended LD PC Board Layout: TOP Silk Screen FIGURE 8. Recommended LD PC Board Layout: TOP Top Layer FIGURE 9. Recommended LD PC Board Layout: Bottom Layer 16 20006163 20006164 20006165 ...

Page 17

Physical Dimensions inches (millimeters) unless otherwise noted Order Number LM4811LD NS Package Number LDA10A 17 www.national.com ...

Page 18

... 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) Order Number LM4811MM NS Package Number MUB10A 2 ...