LM4897 National Semiconductor, LM4897 Datasheet
LM4897
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LM4897 Summary of contents
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... BTL load with less than 1% distortion (THD+N) from a +5V power supply. The LM4897 contains advanced pop and click circuitry that eliminate noises which would otherwise occur during turn-on and turn-off transitions. It also contains a fade-in/fade-out feature that eliminates unnatural sound generated by asserting/de-asserting the SHUTDOWN pin ...
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Typical Application FIGURE 1. Typical Audio Amplifier Application Circuit www.national.com 2 20050901 ...
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... A LM4897 Typical Limit (Note 6) (Notes (max) 0.1 2 µA (max) 350 320 mW (min (max) 0 1kHz 217Hz) 1.4 0.4 26 www.national.com 150˚C 56˚ ...
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... C = 1.0µF B Input terminated with 10Ω to GND –T )/θ or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4897, see power derating maximum of 2µA. SD exceeds 6V (to a max then most of the excess current will flow through the ESD protection circuits. ...
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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 Power Supply Rejection Ratio (PSRR 8Ω 1kHz 1µ Vripple = 200mVpp, Input terminated with 10Ω Power Supply Rejection Ratio (PSRR 8Ω 1kHz, ...
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Typical Performance Characteristics Power Derating - MSOP P = 670mW DMAX 8Ω Output Power vs Load Resistance Supply Current vs Shutdown Voltage (Continued) 200509B2 Clipping (Dropout) Voltage 200509B4 Shutdown Hysterisis Voltage 200509B6 7 ...
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Typical Performance Characteristics Shutdown Hysterisis Voltage Open Loop Frequency Response Fade- 5V 8Ω 1kHz 100kΩ 100kΩ www.national.com (Continued) Shutdown Hysterisis Voltage 200509B8 ...
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Typical Performance Characteristics Fade- 5V 8Ω 1kHz 47kΩ 47kΩ Fade- 5V 8Ω 1kHz 10kΩ ...
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... P DMAX can be added to any of the leads connected to the LM4897 especially effective when connected to V the output pins. Refer to the application information on the LM4897 reference design board for an example of good heat sinking still exceeds 150˚ ...
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... Supply Voltage curve in the Typical Performance Characteristics section standard voltage, in most applications, chosen for the supply rail. Extra supply voltage creates headroom that al- lows the LM4897 to reproduce peaks in excess of 1W with- ). This out producing audible distortion. At this time, the designer DD ...
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... Application Information LM4897 FADE-IN / FADE-OUT www.national.com (Continued) FIGURE 2. Fade-In Behavior FIGURE 3. Fade-Out Behavior 12 20050931 20050932 ...
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... Application Information LM4897 MSOP DEMO BOARD ARTWORK Top Overlay Bottom Layer (Continued) 20050999 200509A1 13 Top Layer 200509A0 www.national.com ...
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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 MSOP Order Number LM4897MM NS Package Number MUB10A 2. A critical component is any component of a life ...