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LM1800

National Semiconductor
Part Number LM1800
Manufacturer National Semiconductor
Description LM1800 Phase-Locked Loop FM Stereo Demodulator
Published Mar 22, 2005
Detailed Description LM1800 Phase-Locked Loop FM Stereo Demodulator April 1987 LM1800 Phase-Locked Loop FM Stereo Demodulator General Descr...
Datasheet PDF File LM1800 PDF File

LM1800
LM1800

Overview
LM1800 Phase-Locked Loop FM Stereo Demodulator April 1987 LM1800 Phase-Locked Loop FM Stereo Demodulator General Description The LM1800 is a second generation integrated FM stereo demodulator using phase locked loop techniques to regenerate the 38 kHz subcarrier The numerous features integrated on the die make possible a system delivering high fidelity sound while still meeting the cost requirements of inexpensive stereo receivers More information available in AN-81 Features Y Y Y Y Y Y Automatic stereo monaural switching 45 dB power supply rejection No coils all tuning performed with single potentiometer Wide operating supply voltage range Excellent channel separation Emitter follower output buffers Connection Diagram Order Number LM1800N See NS Package Number N16A TL H 7888 – 1 Top View Typical Application TL H 7888 – 2 C1995 National Semiconductor Corporation TL H 7888 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 Power Dissipation (Note 3) 18V 1500 mW Operating Temperature Range Operating Supply Voltage Range Storage Temperature Range Lead Temperature (Soldering 10 sec) 0 C to a 70 C a 10V to a 18V b 65 C to a 150 C 260 C Electrical Characteristics (Note 1) Parameter Supply Current Lamp Driver Saturation Lamp Driver Leakage Pilot Level for Lamp ‘‘ON’’ Pilot Level for Lamp ‘‘OFF’’ Stereo Lamp Hysteresis Stereo Channel Separation 100 Hz (Note 2) 1000 Hz (Note 2) 10000 Hz (Note 2) 200 mVrms 1000 Hz Input 200 mVrms 400 Hz Input 500 mVrms 1000 Hz Input 500 mVrms 1000 Hz Input 1800A Only 25 mVrms of Pilot 200 mVrms of 200 Hz Ripple g2 0 Conditions Lamp ‘‘Off’’ 100 mA Lamp Current Min Typ 21 13 10 Max 30 18 Units mA V nA Pin 11 Adjusted to 19 00 kHz Pin 11 Adjusted to 19 00 kHz 30 30 30 15 70 60 40 45 45 03 140 200 04 01 20 mVrms mVrms dB dB dB dB Monaural Channel Unbal...


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