LM4540VHX National Semiconductor, LM4540VHX Datasheet
LM4540VHX
Specifications of LM4540VHX
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LM4540VHX Summary of contents
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... AC ’97 architecture allows for system design flexibility and in- creased overall performance. Block Diagram FIGURE 1. LM4540 Block Diagram © 1999 National Semiconductor Corporation DS100906 Key Specifications n Analog Mixer Dynamic Range n D/A Dynamic Range n A/D Dynamic Range Features n Audio Codec ’ ...
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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 Storage Temperature Input Voltage ESD Susceptibility (Note 5) pins 27, 28 pin 3 ESD Susceptibility (Note 6) pin 3 Junction Temperature Soldering Information Electrical Characteristics The following specifications apply for AV for 0dB is 1Vrms unless otherwise specified ...
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Electrical Characteristics The following specifications apply for AV DD for 0dB is 1Vrms unless otherwise specified. Symbol Parameter Analog to Digital Converters Dynamic Range (Note 2) Frequency Response Digital to Analog Converters Resolution Dynamic Range (Note 2) THD Total Harmonic ...
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Electrical Characteristics The following specifications apply for AV for 0dB is 1Vrms unless otherwise specified. Symbol Parameter Digital Timing Specifications (Note 2) T SYNC active high pulse width SH T SYNC inactive to BIT_CLK start up SYNC2CLK T Setup to ...
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Timing Diagrams Clocks DS100906-10 Data Setup and Hold DS100906-11 Digital Rise and Fall DS100906-12 Cold Reset DS100906-13 Warm Reset DS100906-14 5 www.national.com ...
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Typical Application FIGURE 2. LM4540 Typical Application Circuit www.national.com 6 DS100906-3 ...
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Connection Diagram Pin Description Analog I/O Name Pin Functional Description This is a mono input which gets summed into the stereo line output after the National 3D PC_BEEP 12 I Sound block. The PC_BEEP level can be ...
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Pin Description (Continued) Analog I/O (Continued) Name Pin Functional Description This line level input can be routed through the Input Mux and recorded by the right ADC. In addition, this analog input gets summed into the right ...
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Pin Description (Continued) Digital I/O and Clocking Name Pin 24.576 MHz crystal input. Use a fundamental-mode type crystal. When operating from a XTL_IN 2 I crystal 24.576 MHz crystal output. When operating from a crystal, ...
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Typical Performance Characteristics ADC Noise Floor DS100906-15 ADC Frequency Response DS100906-19 www.national.com DAC Noise Floor DS100906-16 DAC Frequency Response DS100906-20 10 Analog Loopthru Noise Floor DS100906-18 ...
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Application Information AC Link Serial Interface Protocol AC Link Output Frame The audio output frame (output from AC ’97 Controller) con- tains control and PCM data targeted for the LM4540 control registers and stereo DAC. The Tag slot, slot 0, ...
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Application Information (Continued) Bit Description Comment Right 11 Playback 1 = Valid slot PCM Data SD_OUT Slot 1: Control Address Slot 1 is used both to write to the LM4540 registers as well as read back a register’s current value. ...
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Application Information FIGURE 7. Start of Audio Input Frame Bit Description Comment Codec Ready 15 0=Not Ready, 1=Ready Bit Slot 1 data 14 Status Address is valid valid Slot 2 data 13 Status Data is valid valid Slot 3 data ...
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Application Information (Continued) Mixer Input Volume Registers (Index 0Ch - 12h, 18h) These registers control the input volume controls including mute. Each volume control is 5 bit which provides from a range of +12dB gain to 34.5dB attenuation. For stereo ...
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... National Semiconductor Asia Pacific Customer Fax: +49 (0) 1 80-530 85 86 Response Group Email: europe.support@nsc.com Tel: 65-2544466 Fax: 65-2504466 Tel: +49 (0) 1 80-532 78 32 Email: sea.support@nsc.com Tel: +49 (0) 1 80-534 16 80 National Semiconductor Japan Ltd. Tel: 81-3-5639-7560 Fax: 81-3-5639-7507 ...