LM831 Datasheet | National Semiconductor

Description The LM831 is a dual audio power amplifier optimized for very low voltage operation The LM831 has two independent amplifiers giving stereo or higher power bridge (BTL) operation from two- or three-cell power supplies The LM831 uses a patented pensation technique to reduce high-frequency radiation for optimum performance in AM radio applications This pensation also results in lower distortion and less wide-band noise The input is direct-coupled to the LM831 eliminating the usual coupling capacitor Voltage gain is adjustable with a single resistor Features Y Y Y Y Y Low voltage operation 1 8V to 6 0V High power 440 m W 8X BTL 3V Low AM radiation Low noise Low THD Applications Portable tape recorders Portable radios Headphone stereo Portable speakers Typical Application Dual Amplifier with Minimum Parts TL H 6754 - 1 AV e 46 d B BW e 250 Hz to 35 k Hz POUT e 220 m W Ch RL e 4X C1995 National Semiconductor Corporation TL H 6754 RRD-B30M115 Printed in U S A Absolute Maximum Ratings If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply Voltage VS Input Voltage VIN Power Dissipation (Note 1) PD Operating Temperature (Note 1) Topr 7 5V g 0 4V 1 3W (M Package) 1 4W (N Package) b 40 C to a 85 C Storage Temperature Tstg Junction Temperature Tj Lead Temp (Soldering 10 sec ) TL Thermal Resistance i JC (DIP) i JA (DIP) i JC (SO Package) i JA (SO Package) b 65 C to a 150 C a 150 C a 260 C 27 75 20 95 Electrical Characteristics Unless otherwise specified TA e 25 C VS e 3V f e 1 k Hz test circuit is dual or BTL amplifier with minimum parts Symbol VS IQ VOS RIN AV PSRR POD PODL POB POBL Sep IB En0 THD Parameter Operating Voltage Supply Current Output DC Offset Input Resistance Voltage Gain Supply Rejection Power Out Power Out Low VS Power Out Power Out Low VS Channel Separation Input Bias Current Output Noise Distortion Wide Band...