LM1868 Datasheet | National Semiconductor

Description The bination of the LM1868 and an FM tuner will provide all the necessary functions for a 0 5 watt AM FM radio Included in the LM 1868 are the audio power amplifier FM IF and detector and the AM converter IF and detector The device is suitable for both line operated and 9V battery applications Features DC selection of AM FM mode Regulated supply Audio amplifier bandwidth decreased in AM mode reducing amplifier noise in the AM band AM converter AGC for excellent overload characteristics Low current internal AM detector for low tweet radiation Block Diagram Data Shee . TL H 7909 - 1 Order Number LM1868N See NS Package Number N20A Note See table for coil data C1995 National Semiconductor Corporation TL H 7909 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 (Pin 19) Package Dissipation Above TA e 25 C Derate Based on TJ(MAX) e 150 C and i JA e 60 C W 15V 2 0W Storage Temperature Range Operating Temperature Range Lead Temperature (Soldering 10 sec ) b 55 C to a 150 C 0 C to a 70 C 260 C Electrical Characteristics Test Circuit Parameter STATIC CHARACTERISTICS e AM e 0 e FM e 0 Supply Current Regulator Output Voltage (Pin 16) Operating Voltage Range TA e 25 C VS e 9V RL e 8X (unless otherwise noted) Min Typ Max Units Conditions AM Mode S1 in Position 1 35 45 22 39 30 48 15 m A V DYNAMIC CHARACTERISTICS AM MODE f AM e 1 MHz fmod e 1 k Hz 30% Modulation S1 in Position 1 PO e 50 m W unless noted Maximum Sensitivity Signal-to-Noise Detector Output Overload Distortion Total Harmonic Distortion (THD) DYNAMIC CHARACTERISTICS b 3 d B Limiting Sensitivity Measure e AM for PO e 50 m W Maximum Volume e AM e 10 m V e AM e 1 m V Measure at Top of Volume Control e AM e 50 m V 80% Modulation e AM e 10 m V 8 40 40 50 60 2 11 16 m V d B 85 10 2 m V % % FM MODE f FM e 10 7 MHz...