LM1973N National Semiconductor, LM1973N Datasheet
LM1973N
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LM1973N Summary of contents
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... Sound reinforcement systems n Electronic music (MIDI) n Personal computer audio control Connection Diagram Dual-In-Line Plastic or Surface Mount Package DS011958-1 Top View Order Number LM1973M or LM1973N See NS Package Number M20B or N20A December 1994 0.003% (max) 100 kHz (−3dB) (min) 76dB (typ) ± 0.25dB (max) ...
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... Vpk kHz Pins < < @ Pins 9, 10 Pins 9, 10 Pins JMAX or the number given in the Absolute Maximum Ratings, whichever is lower. For the LM1973N, T resistor. 2 +260˚C −65˚C to +150˚C (Notes MIN A MAX 0˚C T +70˚C A − 4.5V to 12V DD SS LM1973 ...
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Electrical Characteristics (Notes 1, 2) (Continued) Pin Description Signal Ground (1, 5, 17): Each input has its own indepen- dent ground, GND1, GND2, and GND3. Signal Input (2, 4, 18): There are 3 independent signal in- puts, IN1, IN2, and ...
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Typical Performance Characteristics Supply Current vs Supply Voltage DS011958-16 THD vs Freq by FFT = 12V V − DS011958-19 THD + N vs Frequency and Amplitude DS011958-22 www.national.com Supply Current vs Temperature DS011958-17 THD ...
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Typical Performance Characteristics THD + N vs Amplitude ± Hz into CH1 DS011958-25 Application Information ATTENUATION STEP SCHEME The fundamental attenuation step scheme for the LM1973 µPot is ...
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Application Information LM1973 Channel Attenuation vs Digital Step Value (Programmed 2.0dB Steps) FIGURE 5. LM1973 2.0dB Attenuation Step Scheme FIGURE 6. Mono Level Control with Panning Circuit INPUT IMPEDANCE The input impedance of a µPot is constant at a nominal ...
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Application Information (Continued) FIGURE 7. Serial Data Format Transfer Process TABLE 1. LM1973 Micropot Attenuator Register Set Description MSB: LSB Address Register (Byte 0) 0000 0000 Channel 1 0000 0001 Channel 2 0000 0010 Channel 3 Data Register (Byte 1) ...
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Application Information DAISY-CHAIN CAPABILITY Since the µPot’s digital interface is essentially a shift register, multiple µPots can be programmed utilizing the same data and load/shift lines. As shown in Figure 11 , for an n-µPot daisy-chain, there are 16n bits ...
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Application Information (Continued) FIGURE 10. Digitally-Controlled Logarithmic Gain Amplifier Circuit FIGURE 11. n-µPot Daisy-Chained Circuit DS011958-13 9 DS011958-12 www.national.com ...
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... Physical Dimensions inches (millimeters) unless otherwise noted www.national.com Surface Mount Package Order Number LM1973M NS Package Number M20B Dual-In-Line Plastic Package Order Number LM1973N NS Package Number N20A 10 ...
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... 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 AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...