LM4756 Datasheet | National Semiconductor

Description The LM4756 is a stereo audio amplifier capable of delivering 7W/channel at 10% distortion into a 4Ω or 8Ω load. The power amp has an internally set gain of 30d B. A 0V- 5V DC controlled volume block provides 80d B 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 75d B of attenuation. The LM4756 maintains an excellent Signal-to-Noise ratio of greater than 70d B with a low noise floor less than 2m V. The IC also maintains above 50d B 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 n n n n n n Output power into 4Ω or 8Ω at 10% THD Maximum operating voltage Power output stage Noise floor Line output Noise floor 0V- 5V DC controlled volume attenuation Mute attenuation Standby-mode supply current 7W (typ) 28V (max) 2m V (typ) 55µV (typ) 80d B (typ) 75d B (typ) 7m A (typ) Features n n n n Quiet fade-in/out mute function Stereo variable line-out pins AC output short circuit protection Thermal shutdown protection Applications n Audio amplifier for stereo TVs n Audio amplifier ponent stereo n Audio amplifier pact stereo Connection Diagrams Plastic Package Plastic Package Top View Order Number LM4756TA See NS Package Number TA15A 90 Degree Lead Bend Order Number LM4756TA Spec. LB10 See NS Package Number TA15D Top View U - Wafer Fab Code Z - Assembly Plant Code XY - Date Code TT - Die Traceability LM4756TA - LM4756TA © 2003 National Semiconductor Corporation DS200644 .national. Typical Application FIGURE 1. Typical Audio Amplifier Application Circuit .national. Absolute Maximum Ratings 4) (Notes 3, T Package (10 sec) Storage Temperature Input...