LM1973MX/NOPB National Semiconductor, LM1973MX/NOPB Datasheet
LM1973MX/NOPB
Specifications of LM1973MX/NOPB
*LM1973MX/NOPB
LM1973MX
Related parts for LM1973MX/NOPB
LM1973MX/NOPB Summary of contents
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... Typical Application FIGURE 1. Typical Audio Attenuator Application Circuit µPot ™ and Overture ™ are trademarks of National Semiconductor Corporation. © 2004 National Semiconductor Corporation Key Specifications n Total Harmonic Distortion + Noise: n Frequency response: n Attenuation range (excluding mute): n Differential attenuation: n Signal-to-noise ratio (ref. 4 Vrms): ...
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... Absolute Maximum Ratings 2) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (V – Voltage at Any Pin V SS Power Dissipation (Note 3) ESD Susceptability (Note 4) Junction Temperature Electrical Characteristics The following specifications apply for all channels with V specified. Limits apply for T = 25˚ ...
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Electrical Characteristics Note 6: Limits are guaranteed to National’s AOQL (Average Output Quality Level). Note 7: At the present time the Crosstalk measurement is specified as a typical only, which is due to a hardware limitation of the automated test ...
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Typical Performance Characteristics Supply Current vs Supply Voltage Noise Floor Spectrum by FFT Amplitude vs Frequency THD vs V OUT 1 kHz by FFT V − 12V DD SS www.national.com 01195816 01195818 at 01195820 4 Supply Current vs ...
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Typical Performance Characteristics THD + N vs Frequency and Amplitude FFT of 20 kHz THD THD + N vs Amplitude ± kHz into CH1 @ (Continued) 01195822 01195824 6V 01195826 ...
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Application Information ATTENUATION STEP SCHEME The fundamental attenuation step scheme for the LM1973 µPot is shown in Figure 3. This attenuation step scheme, however, can be changed through programming techniques to fit different application requirements. One such example would be ...
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Application Information FIGURE 6. Mono Level Control with Panning Circuit INPUT IMPEDANCE The input impedance of a µPot is constant at a nominal 40 kΩ. To eliminate any unwanted DC components from propagating through the device it is common to ...
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Application Information TABLE 1. LM1973 Micropot Attenuator Register Set Description MSB: LSB Address Register (Byte 0) 0000 0000 0000 0001 0000 0010 Data Register (Byte 1) Contents Attenuation Level dB 0000 0000 0000 0001 0000 0010 0000 0011 : : ...
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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 to ...
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Application Information FIGURE 10. Digitally-Controlled Logarithmic Gain Amplifier Circuit www.national.com (Continued) 01195813 FIGURE 11. n-µPot Daisy-Chained Circuit 10 01195812 ...
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Physical Dimensions inches (millimeters) unless otherwise noted Surface Mount Package Order Number LM1973M NS Package Number M20B Dual-In-Line Plastic Package Order Number LM1973N NS Package Number N20A 11 www.national.com ...
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... BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...