LM3089 FM Receiver IF System Y General Description The LM3089 has been designed to provide all the major functions required for modern FM IF designs of automotive, high-fidelity and communications receivers. Y Features Y Y Y Three stage IF amplifier/limiter provides 12 mV (typ) b 3 dB limiting sensitivity Balanced product detector and audio amplifier provide 400 mV (typ) of recovered audio with distortion as low as 0.1% with proper external coil designs. Y Y Four internal carrier level detectors provide delayed AGC signal to tuner, IF level meter drive current and interchannel mute control AFC amplifier provides AFC current for tuner and/or center tuning meters Improved operating and temperature performance, especially when using high Q quadrature coils in narrow band FM communications receivers No mute circuit latchup problems A direct replacement for CA3089E Connection Diagram Dual-In-Line Package TL/H/7149 – 2 Top View Order Number LM3089N See NS Package Number N16E C1995 National Semiconductor Corporation TL/H/7149 RRD-B30M115/Printed in U. S. A. LM3089 FM Receiver IF System September 1992 Toko America 1250 Feehanville Drive Mount Prospect, IL 60056 (312) 297-0070 TL/H/7149 – 1 Block Diagram 2 Absolute Maximum Ratings Power Dissipation (Note 2) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. Supply Voltage Between Pin 11 and Pins 4, 14 Storage Temperature Range Lead Temperature (Soldering, 10 seconds) a 16V DC Current Out of Pin 12 DC Current Out of Pin 13 DC Current Out of Pin 15 1500 mW Operating Temperature Range 5 mA 5 mA 2 mA b 40§ C to a 85§ C b 65§ C to a 150§ C 260§ C Electrical Characteristics (TA e 25§ C, VCC e a 12V, see Test Circuit) Symbol Parameter Conditions Min Typ Max Units 16 1.2 5.0 5.0 5.0 5.0 4.2 23 1.9 5.6 5.6 5.6 5.4 0 4.7 30 2.4 6.0 6.0 6.0 6.0 0.5 5.3 mA V V V V V V V 12 55 400 25 45 300 DC CHARACTERISTICS (VIN e 0, NOT MUTED) I11 V1, 2, 3 V6 V7 V10 V12 V13 V15 Supply Current IF Input and Bias Audio Output AFC Output Reference Bias Mute Control IF Level Delayed AGC DYNAMIC CHARACTERISTICS fo e 10.7 MHZ, Df e g 75 kHz VIN(LIM) AMR VO(AF) THD S a N/N V12 V13 V13 V15 V15 VO(AF) Input Limiting b3 dB AM Rejection Recovered Audio Total Harmonic Distortion Single Tuned (Note 1) Double Tuned (Note 1) Signal to Noise Ratio Mute Control IF Level IF Level Delayed AGC Delayed AGC Audio Muted @ 400 Hz VIN e 100 mV, AM: 30% VIN e 10 mV VIN VIN VIN VIN VIN VIN VIN VIN VIN e e e e e e e e e 100 mV 100 mV 100 mV 100 mV 100 mV 500 mV 100 mV 30 mV 100 mV, V5 e a 2.5V 60 4.0 1.0 0.5 0.1 70 0 5.0 1.5 0.1 2.5 60 mV b dB 500 mVrms 1.0 0.3 % % dB V V V V V b dB 0.5 6.0 2.0 0.5 Note 1: Distortion is a function of quadrature coil used. Note 2: For operation in ambient temperatures above 25§ C, the device must be derated based on a 150§ C maximum junction temperature and a thermal resistance of 80§ C/W junction to ambient. Typical Performance Characteristics Typical S a N/N and IF Limiting Sensitivity vs IF Input Signal Typical AGC (Pin 15) and Meter Output (Pin 13) vs IF Input Signal AM Rejection (30% Mod) vs IF Input Signal TL/H/7149 – 3 3 TL/H/7149 – 4 Schematic Diagram 4 Typical Performance Characteristics Supply Current (I11) vs Supply Voltage (V11) Reference Voltage, AGC and Meter Output vs Supply Voltage Mute Control Output (Pin 12) vs IF Input Signal TL/H/7149 – 5 Typical Audio Attenuation (Pin 6) vs Mute Input Voltage (Pin 5) DC Test Circuit TL/H/7149 – 6 TL/H/7149 – 7 AC Test Circuit *For single tuned dectector coil: LO tunes with 100 pF at 10.7 MHz QUL (unloaded) j 75 QL (loaded) j 13 for V9 j 150 mVrms KAC-K2318HM **For double tuned detector coil: QULPRI e QULSEC j 75 kQ j 0.7 for V9 j 150 mVrms Note: The recovered audio output voltage will be approximately 0.5 dB less when using the double tuned detector coil. For proper operation of the mute circuit, the RF voltage at pin 9 should be 150 mVrms g 30 mV. TL/H/7149 – 8 5 LM3089 FM Receiver IF System AC Test Circuit (Continued) TL/H/7149 – 9 Physical Dimensions inches (millimeters) Dual-In-Line Package (N) Order Number LM3089N See NS Package Number N16E LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. National Semiconductor Corporation 1111 West Bardin Road Arlington, TX 76017 Tel: 1(800) 272-9959 Fax: 1(800) 737-7018 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. National Semiconductor Europe Fax: (a49) 0-180-530 85 86 Email: cnjwge @ tevm2.nsc.com Deutsch Tel: (a49) 0-180-530 85 85 English Tel: (a49) 0-180-532 78 32 Fran3ais Tel: (a49) 0-180-532 93 58 Italiano Tel: (a49) 0-180-534 16 80 National Semiconductor Hong Kong Ltd. 13th Floor, Straight Block, Ocean Centre, 5 Canton Rd. Tsimshatsui, Kowloon Hong Kong Tel: (852) 2737-1600 Fax: (852) 2736-9960 National Semiconductor Japan Ltd. Tel: 81-043-299-2309 Fax: 81-043-299-2408 National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.