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LM4756 Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LM4756 Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 17 page  LM4756 Dual 7W Audio Power Amplifier w/Mute, Standby and Volume Control General Description The LM4756 is a stereo audio amplifier capable of delivering 7W/channel at 10% distortion into a 4 Ω or 8Ω load. The power amp has an internally set gain of 30dB. A 0V–5V DC controlled volume block provides 80dB of attenuation from input to line-out. Line outputs are available after the volume control for signal routing. The amplifier has a smooth transition fade-in/out mute and a power conserving standby function which are controlled through TTL or CMOS logic. Both functions provide over 75dB of attenuation. The LM4756 maintains an excellent Signal-to-Noise ratio of greater than 70dB with a low noise floor less than 2mV. The IC also maintains above 50dB of channel separation. The LM4756 is available in a 15-lead non-isolated plastic package and is designed for use in TV applications requiring single supply operation. Key Specifications n Output power into 4 Ω or 8Ω at 10% THD 7W (typ) n Maximum operating voltage 28V (max) n Power output stage Noise floor 2mV (typ) n Line output Noise floor 55µV (typ) n 0V–5V DC controlled volume attenuation 80dB (typ) n Mute attenuation 75dB (typ) n Standby-mode supply current 7mA (typ) Features n Quiet fade-in/out mute function n Stereo variable line-out pins n AC output short circuit protection n Thermal shutdown protection Applications n Audio amplifier for stereo TVs n Audio amplifier component stereo n Audio amplifier compact stereo Connection Diagrams Plastic Package Plastic Package 20064433 Top View Order Number LM4756TA See NS Package Number TA15A 90 Degree Lead Bend Order Number LM4756TA Spec. LB10 See NS Package Number TA15D 20064444 Top View U - Wafer Fab Code Z - Assembly Plant Code XY - Date Code TT - Die Traceability LM4756TA - LM4756TA September 2003 © 2003 National Semiconductor Corporation DS200644 www.national.com |
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