lmc835 National Semiconductor Corporation, lmc835 Datasheet
lmc835
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lmc835 Summary of contents
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... The LMC835 is used with external resonator circuits to make a stereo equalizer with seven bands dB gain range and 25 steps each Only three digital inputs are needed to control the equalization The LMC835 makes it easy to build a mP-controlled equalizer The signal path is designed for very low noise and distor- ...
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Block Diagram 2 ...
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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 b Supply Voltage Allowable Input Voltage (Note 1) b Storage Temperature T stg Lead ...
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Electrical Characteristics SIGNAL PATH SECTION Symbol Parameter E Gain Error THD Total Harmonic A Distortion Maximum Output Voltage A O Max S N Signal to Noise Ratio A ...
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Truth Tables DATA I (Band Selection ...
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Test Circuits FIGURE 3 Test Circuit for AC Measurement FIGURE 4 Test Circuit for Leakage Current Measurement 6753 – 6753 – 6 ...
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Test Circuits (Continued) Typical Performance Characteristics Supply Current vs Supply Voltage TL H 6753 – 7 FIGURE Converter FIGURE 6 Simple Word Generator Supply Current vs Temperature 6753 – 8 Input Capacitance vs ...
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Typical Performance Characteristics Maximum Output Voltage vs Supply Voltage Distortion vs Frequency Range Distortion vs Output Voltage 6 dB Range g Gain vs Frequency 6 dB Range (Boost) g (Continued) Maximum Output Voltage Nominal Resistor vs Temperature ...
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Typical Applications TABLE I Tuned Circuit Elements 12dB Z1 f (Hz) C ( 100k Z2 160 0 47m 0 ...
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... LMC835 Gain vs Frequency Range (All Boost or Cut) LMC835 Gain vs Frequency Range (All Boost or Cut) LMC835 Gain vs Frequency Range (1 kHz Boost or Cut) LMC835 Gain vs Frequency Range (1 kHz Boost or Cut) FIGURE 9 12-Band Equalizer 6753 – 6753 – 14 ...
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... FIGURE 10 Tuned Circuit for 680 12-Band Equalizer ( Figure 9 ) 510 LMC835 12 Band E Q Application Gain vs Frequency (1 kHz Boost or Cut) LMC835 12 Band E Q Application Gain vs Frequency (1 kHz Boost or Cut ...
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Typical Applications (Continued) FIGURE 11 Single Supply Stereo Equalizer TL H 6753 – The output is used to bias the gyrators ...
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... Typical Applications (Continued) FIGURE 12 Stereo 7-Input 1-Output Mixers (THD is not as low as equalizer circuit) FIGURE 14 LMC835-COP404L CPU Interface TL H 6753 – 18 FIGURE 13 Stereo Volume Control Very Low THD 6753 – 6753 – 20 ...
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... MM74HC165 from 8 toggle switches The bits are shifted out to the DATA input of the LMC835 in sync with the clock When all data bits have been loaded CLOCK is inhibited and a STROBE pulse is generated this sequence is initiated by a START pulse ...
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Application Hints (Continued) MODEL REDUCING EXTERNAL COMPONENTS The typical application shown in Figure 7 is switching noise free The DC-coupled circuit in Figure 16 is also switching noise free except switch turn ON OFF This ...
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... Physical Dimensions inches (millimeters) Order Number LMC835N NS Package N28B 17 ...
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... Fax (81-41) 35-1 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 Order Number LMC835V NS Package V28A 2 A critical component is any component of a life ...