lm4543 National Semiconductor Corporation, lm4543 Datasheet
lm4543
Related parts for lm4543
lm4543 Summary of contents
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... LM4543 AC ’97 Codec with National 3D Sound General Description The LM4543 is an audio codec for PC systems which per- forms the analog-intensive function of the Analog Codec ’97 Rev 1.03 architecture. Using 18-Bit A/D and D/A convert- ers, the LM4543 provides 90dB of dynamic range. The LM4543 was designed specifically to provide a high quality audio path and provide all analog functionality audio system. It features full duplex stereo A/D’ ...
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... L CD Left to Right CD Left to Right 0dB to 22.5dB +12dB to -34.5dB 2 215˚C 220˚C 74˚C/W −40˚C T 85˚C MAX A 4.2V AV 5.5V DD 3. 25˚C. The reference A Units LM4543 (Limits) Typical Limit (Note 7) (Note 8) 4.2 V (min) 5.5 V (max) 3.0 V (min) 5.5 V (max 1 ...
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... SDATA_IN, SDATA_OUT to falling edge of BIT_CLK Hold time of SDATA_IN, SDATA_OUT from falling edge of BIT_CLK BIT_CLK, SYNC, SDATA_IN or SDATA_OUT BIT_CLK, SYNC, SDATA_IN or SDATA_OUT For cold reset For cold reset 3 = 25˚C. The reference A Units LM4543 (Limits) Typical Limit (Note 7) (Note (min) 20 kHz 18 Bits 89 ...
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... Limits apply for Conditions For warm reset For warm reset For ATE Test Mode For ATE Test Mode JMAX or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4543 resistor 25˚C. The reference A Units LM4543 (Limits) ...
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Timing Diagrams Clocks DS100907-10 Data Setup and Hold DS100907-11 Digital Rise and Fall DS100907-12 Cold Reset DS100907-13 Warm Reset DS100907-14 5 www.national.com ...
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... Typical Application FIGURE 2. LM4543 Typical Application Circuit www.national.com 6 DS100907-3 ...
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... The amount of AUX_R AUX_R 15 I signal mixed in the right output stream can be adjusted from +12dB to −34.5dB in 1.5dB steps as well as muted via register 16h. Top View Order Number LM4543VH See NS Package Number VBH48A 7 DS100907-2 www.national.com ...
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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 left ADC. In addition, this analog input gets summed into the left ...
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... This data stream contains both control data and ADC audio data. This output is clocked out SDATA_IN the LM4543 on the rising edge of BIT_CLK. 48kHz sync pulse which signifies the beginning of both the SDATA_IN and SDATA_OUT SYNC 10 I serial streams. SYNC must be synchronous to BIT_CLK. ...
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Typical Performance Characteristics ADC Noise Floor DS100907-15 ADC Frequency Response DS100907-19 www.national.com DAC Noise Floor DS100907-16 DAC Frequency Response DS100907-20 10 Analog Loopthru Noise Floor DS100907-18 ...
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... The first bit of slot 0 is designated the Valid Frame bit. If this bit indicates that the current data frame contains at least one slot of valid data and the LM4543 will further sampled the next four bits to determine which frames do in fact have valid data. Valid slots are signified their re- spective slot bit position ...
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... Reserved Set to 0 SD_OUT Slot 2: Control Data Slot 2 is used to transmit 16 bit control data to the LM4543 in the event that the current operation is a write operation. The least significant four bits should be stuffed with zeros by the AC ’97 controller. If the current operation is a register read, the entire slot, bits 19 through 0 should be stuffed with zeros ...
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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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... ADC/DAC loopback Powerdown Control / Status Register (26h) This read/write register is used to monitor subsystem readi- ness and program LM4543 powerdown states. The lower half of this register is read only with a 1 indicated the sub- section is ready. Writing to the lower 8 bits will have no effect. ...
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... 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. 48-Lead , TQFP 1.4mm, JEDEC (M) Order Number LM4543VH NS Package Number VBH48A 2 ...