LM387AN

LM387 LM387A Low Noise Dual Preamplifier March 1987 LM387 LM387A Low Noise Dual Preamplifier General Description The LM387 is a dual preamplifier for the amplification of low level signals in applications requiring optimum noise performance Each of the two amplifiers is completely independent with an internal power supply decoupler-regulator providing 110 dB supply rejection and 60 dB channel separation Other outstanding features include high gain (104 dB) large output voltage swing (VCC b 2V)p-p and wide power bandwidth (75 kHz 20 Vp-p) The LM387A is a selected version of the LM387 that has lower noise in a NAB tape circuit and can operate on a larger supply voltage The LM387 operates from a single supply across the wide range of 9V to 30V the LM387A operates on a supply of 9V to 40V The amplifiers are internally compensated for gains greater than 10 The LN387 LM387A is available in an 8-lead dualin-line package The LM387 LM387A is biased like the LM381 See AN-64 and AN-104 Features Y Y Y Y Y Y Y Y Y Y Y Low noise 1 0 mV total input noise High gain 104 dB open loop Single supply operation Wide supply range LM387 9 to 30V LM387A 9 to 40V Power supply rejection 110 dB Large output voltage swing (VCC b 2V)p-p Wide bandwidth 15 MHz unity gain Power bandwidth 75 kHz 20 Vp-p Internally compensated Short circuit protected Performance similar to LM381 Schematic and Connection Diagrams Dual-In-Line Package TL H 7845 – 2 Top View Order Number LM387N or LM387AN See NS Package Number N08E TL H 7845 – 1 Typical Applications TL H 7845 – 3 FIGURE 1 Flat Gain Circuit (AV e 1000) TL H 7845 – 4 FIGURE 2 NAB Tape Circuit C1995 National Semiconductor Corporation TL H 7845 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 LM387 LM387A a 30V a 40V Power Dissipation (Note 1) Operating Temperature Range Storage Temperature Range Lead Temperature (Soldering 10 sec ) 1 5W 0 C to a 70 C b 65 C to a 150 C 260 C Electrical Characteristics TA e 25 C Parameter Voltage Gain Supply Current Input Resistance Positive Input Negative Input Input Current Negative Input Output Resistance Output Current Output Voltage Swing Unity Gain Bandwidth Large Signal Frequency Response Maximum Input Voltage Supply Rejection Ratio Input Referred Channel Separation Total Harmonic Distortion Total Equivalent Input Noise (Flat Gain Cricuit) Output Noise NAB Tape Playback Circuit Gain of 37 dB Open Loop Source Sink Peak-to-Peak VCC e 14V unless otherwise stated Min Typ 160 000 10 10 50 100 200 05 150 8 2 VCCb2 15 31 Max Units VV mA mA kX kX mA X mA mA V MHz kHz 300 110 40 60 01 10 400 05 12 700 mVrms dB dB % mVrms mVrms Conditions Open Loop f e 100 Hz LM387 VCC 9V–30V RL e % LM387A VCC 9V–40V RL e % 20 Vp-p (VCC l 24V) THD s 1% Linear Operation f e 1 kHz f e 1 kHz 60 dB Gain f e 1 kHz 10 Hz–10 000 Hz LM387 Figure 1 Unweighted LM387A Figure 2 75 Note 1 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 Applications (Continued) Two-Pole Fast Turn-ON NAB Tape Preamplifier Frequency Response of NAB Circuit of Figure 2 TL H 7845 – 6 TL H 7845–5 2 Typical Performance Characteristics VCC vs ICC Gain and Phase Response Large Signal Frequency Response PSRR vs Frequency (Input Referred) Channel Separation Distortion vs Frequency Non-Inverting Amplifier Noise Voltage vs Frequency Noise Current vs Frequency Distortion vs Frequency Inverting Amplifier TL H 7845 – 7 3 LM387 LM387A Low Noise Dual Preamplifier Typical Applications (Continued) Inverting Amplifier Ultra-Low Distortion Typical Magnetic Phono Preamplifier TL H 7845 – 8 TL H 7845 – 9 Physical Dimensions inches (millimeters) Molded Dual-In-Line Package (N) Order Number LM387N or LM387AN NS Package Number N08E 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 Fran ais 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