lm4905 National Semiconductor Corporation, lm4905 Datasheet
lm4905
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lm4905 Summary of contents
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... The LM4905 contains advanced pop & click circuitry which eliminates noise which would otherwise occur during turn-on and turn-off transitions. The LM4905 is unity-gain stable and can be configured by external gain-setting resistors. Typical Application FIGURE 1. Typical Audio Amplifier Application Circuit Boomer is a registered trademark of National Semiconductor Corporation ...
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... Connection Diagrams www.national.com LD Package Top View Order Number LM4905LD See NS Package Number LDA08A LQ Package 20050802 Top View Order Number LM4905LQ See NS Package Number LQB08A Mini Small Outline (MSOP) Package 20050801 Top View Order Number LM4905MM See NS Package Number MUA08A 2 200508E1 ...
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... Limit (Note 6) (Notes (max (max) 0.8 2 µA (max) 1.5 1 (max) 1.07 0.9 100 mS (max) 0 217Hz 1kHz) = 25˚C. A LM4905 Typical Limit (Note 6) (Notes (max (max) 0.1 1.0 µA (max) 1.3 1 (max) 390 75 mS (max) 0 217Hz 1kHz) www.national.com 57˚ ...
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... V = 200mV sine p-p ripple Input terminated with 10Ω –T )/θ or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4905, see power derating A JA exceeds 6V (to a max then most of the excess current will flow through the ESD protection circuits occurs at an output power level significantly below full output power ...
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External Components Description (Figure 1) 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 amplifiers input ...
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Typical Performance Characteristics THD+N vs Power Out 3V, 8Ω Power Supply Rejection Ratio (PSRR) vs Frequency 5V, 8Ω Input terminated with 10Ω Power Supply Rejection Ratio (PSRR) vs Frequency at ...
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Typical Performance Characteristics Power Supply Rejection Ratio (PSRR) vs Frequency 2.6V, 8Ω Input terminated with 10Ω Open Loop Frequency Response, 5V Open Loop Frequency Response, 2.6V (Continued) Power Supply Rejection Ratio (PSRR) vs Frequency L ...
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Typical Performance Characteristics Power Derating Curves Power Dissipation vs Output Power, V Shutdown Hysteresis Voltage 5V www.national.com (Continued) 20050869 =3V DD 200508C8 200508A1 8 Power Dissipation vs Output Power, 5V, 8Ω 20050897 Power Dissipation vs Output Power, V =2.6V DD ...
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Typical Performance Characteristics Shutdown Hysteresis Voltage 2.6V Output Power vs Supply Voltage, 16Ω Frequency Response vs Input Capacitor Size (Continued) 200508A5 200508A7 20050854 9 Output Power vs Supply Voltage, 8Ω 200508A6 Output Power vs Supply Voltage, 32Ω 200508A8 www.national.com ...
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... P values without thermal shutdown DMAX protection circuitry being activated. Additional copper foil can be added to any of the leads connected to the LM4905 especially effective when connected to V www.national.com output pins. Refer to the application information on the LM4905 reference design board for an example of good heat sinking ...
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... Extra supply voltage creates headroom that allows the LM4905 to reproduce peaks in excess of 1W without producing audible distortion. At this time, the de- signer must make sure that the power supply choice along with the output impedance does not violate the conditions explained in the Power Dissipation section ...
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Application Information nates possible high frequency oscillations. Care should be taken when calculating the -3dB frequency in that an incor- rect combination of R and C will cause rolloff before 3 4 www.national.com 20kHz. A typical combination of feedback resistor ...
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... Application Information DIFFERENTIAL AMPLIFIER CONFIGURATION FOR LM4905 (Continued) FIGURE 3. REFERENCE DESIGN BOARD SCHEMATIC FIGURE 4. 13 200508D5 200508D6 www.national.com ...
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... LM4905 Audio AMP Tantalum Capcitor, 1µF Ceramic Capacitor, 0.39µF Resistor, 20kΩ, 1/10W Resistor, 100kΩ, 1/10W Jumper Header Vertical Mount 2X1 0.100“ spacing www.national.com (Continued) 200508E3 200508E5 MONO LM4905 REFERENCE DESIGN BOARDS BILL OF MATERIAL Quantity Silk Screen ...
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Application Information PCB LAYOUT GUIDELINES This section provides practical guidelines for mixed signal PCB layout that involves various digital/analog power and ground traces. Designers should note that these are only "rule-of-thumb" recommendations and the actual results will depend heavily on ...
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... Physical Dimensions www.national.com inches (millimeters) unless otherwise noted LLP Package Order Number LM4905LD NS Package Number LDA08A LLP Package Order Number LM4905LQ NS Package Number LQB08A 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) MSOP Package Order Number LM4905MM NS Package Number MUA08A 2. A critical component is any component of a life ...