LM1894M National Semiconductor, LM1894M Datasheet
LM1894M
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LM1894M Summary of contents
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... Non-complementary noise reduction, “single ended” n Low cost external components, no critical matching Typical Application * kΩ total. See Application Hints. Order Number LM1894M, LM1894N, or LM1894MT See NS Package Number M14A, N14A, or MTC14 FIGURE 1. Component Hook-Up for Stereo DNR System DNR ® registered trademark of National Semiconductor Corporation. ...
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... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage Input Voltage Range Operating Temperature (Note 2) Storage Temperature Soldering Information Dual-In-Line Package Soldering (10 seconds) Electrical Characteristics 25˚ 300 kHz, circuit shown in Figure 1 unless otherwise specified ...
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Electrical Characteristics 25˚ 300 kHz, circuit shown in Figure 1 unless otherwise specified Parameter Gain Amplifier Input Impedance Voltage Gain Peak Detector Input Impedance Voltage Gain Attack ...
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Typical Performance Characteristics Supply Current vs Supply Voltage Power Supply Rejection Ratio (Referred to the Output) vs Frequency −3 dB Bandwidth vs Frequency and Control Signal www.national.com (Referred to the Output) 00791813 00791815 Gain of Control Path 10 kHz FM ...
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Typical Performance Characteristics Main Signal Path Bandwidth vs Voltage Control Output Response (Continued) Peak Detector Response 00791803 00791805 5 00791804 www.national.com ...
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External Component Guide (Figure 1) Component Value Purpose C1 0.1 µF– May be part of power supply, 100 µF or may be added to suppress power supply oscillation. C2, C13 1 µF Blocks DC, pin 2 and pin 13 are ...
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Circuit Operation (Continued) PSYCHOACOUSTIC BASICS The dynamic noise reduction system is a low pass filter that has a variable bandwidth of 1 kHz to 30 kHz, dependent on music spectrum. The DNR system operates on three prin- ciples of psychoacoustics. ...
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FIGURE 3. Output vs Frequency FIGURE 4. −3 dB Bandwidth vs Frequency and Control Signal www.national.com Application Hints The DNR system should always be placed before tone and volume controls as shown in Figure 1. This is because any adjustment ...
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Application Hints (Continued) FIGURE 5. Bar Graph Display of Peak Detector Voltage FIGURE 6. Technique for Measuring S/N Improvement of the DNR System FOR FURTHER READING Tape Noise Levels 1. “A Wide Range Dynamic Noise Reduction System”, Black- mer, “dB” ...
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Printed Circuit Layout www.national.com DNR Component Diagram 10 00791812 ...
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... Physical Dimensions inches (millimeters) unless otherwise noted SO Package (M) Order Number LM1894M NS Package Number M14A Molded Dual-In-Line Package (N) Order Number LM1894N NS Package Number N14A 11 www.national.com ...
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... Deutsch Tel: +49 (0) 69 9508 6208 English www.national.com Français Tel: +33 ( 8790 TSSOP Package Order Number LM1894MT NS Package Number MTC14 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 affect its safety or effectiveness ...